http://oceans.mit.edu
America/New_York
America/New_York
America/New_York
20171105T020000
-0400
-0500
20181104T020000
EST
20180311T020000
-0500
-0400
EDT
ai1ec-817099@oceans.mit.edu
20180502T144718Z
Cambridge, MA –MIT’s Department of Earth, Atmospheres, and Planetary Sciences (EAPS) celebrates the 10th anniversary of the Cambridge Science Festival with engaging, family-friendly science exhibits and demonstrations around Cambridge, Massachusetts on April 22nd and 23rd. All MIT events are free and open to the public.
April 22nd:
Diving into the Pale Blue Dot
Workshop: Fish ‘n’ Ships
MIT Museum Revealed: Undersea Robotics Tour
April 23rd:
MIT Open House
More on EAPS Science Festival events here.
20160422
20160424
MIT, Cambridge, MA
0
Cambridge Science Festival
ai1ec-820918@oceans.mit.edu
20180502T144718Z
Special Events,WHOI Events
Ms. Annie Doucette; 508.289.2543; adoucette@whoi.edu; http://web.whoi.edu/famos/wp-content/uploads/sites/18/2016/07/2016-Original-Meeting-Info-Package.pdf
The Forum for Arctic Ocean Modeling and Observational Synthesis (FAMOS) is an international effort to focus on enhancing collaboration and coordination among arctic marine and sea ice modelers, theoreticians and observationalists based on a set of activities starting from generating hypotheses, to planning research included both observations and modeling, and to finalizing analyses synthesizing major results from the field studies and coordinated numerical experiments.
FAMOS motivation and approach
FAMOS project is motivated by and a logical continuation of more than 10-years of AOMIP (Arctic Ocean Model Intercomparison Project, www.whoi.edu/projects/AOMIP) work demonstrating that that the arctic marine science community needs an informal forum to discuss, coordinate, plan and synthesize scientific activities. The AOMIP approach has been to leverage the existing financial support of each project participant for a comparative analysis of different models and scientific results. This approach has provided a unique opportunity to coordinate studies nationally and internationally via a set of carefully-planned numerical experiments covering the most important processes and interactions. A clear advantage is that each participant is able to work with her/his specific research theme using simulation results from more than a single model and to analyze differences and test hypotheses using a multi-model suite of outputs. The result is a synthesis that integrates observational and modeling efforts toward the overall goal of developing advanced Arctic models able to accurately reconstruct past, describe current, and predict future Arctic conditions. In this regard, FAMOS’s approach will be similar AOMIP’s one and we view FAMOS as a “collaboratory” i.e., a collaborative frame-work wherein modelers and observers discuss results, problems, and new ideas, all with the goals of model improvement and better understanding of the Arctic climate system.
Participants include several speakers from MIT and WHOI.
More information here and here.Tickets: http://web.whoi.edu/famos/meeting-5-november-1-4-2016/.
20161101
20161105
+41.526498;-70.673086
Woods Hole Oceanographic Institution @ Woods Hole, Falmouth, MA, USA
0
Forum for Arctic Modeling & Observational Synthesis
external
arctic,FAMOS,modeling,ocean,sea ice,whoi
http://web.whoi.edu/famos/meeting-5-november-1-4-2016/
bhna718bd2l6qts3jiion6vg5k@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
20171012
20171013
0
TBA
83rrcno47f5rumaeclvp2d6114@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150505T150000
20150505T160000
Clark 507
0
Amala Mahadevan, WHOI. ‘Eddy-driven subduction of particulate organic carbon and oxygen from the North Atlantic spring bloom ‘. Clark 507.
h4sofbi5ibsgevrin97kepp44k@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Abstract: A major question in how we approach climate change and its impact on the carbon cycle is at what level of granularity must we understand phytoplankton diversity. The phytoplankton that mediate CO2 uptake in the marine biosphere are tremendously diverse, non-homogeneously distributed and oftentimes physiologically ill-characterized. Additionally, they live among non-photosynthetic microbes from the three domains of life – creating a complex network of chemical exchanges and physical interactions. Microbial oceanographers frequently employ genome and environmental sequence analyses to tackle these topics, and yet many genes and features of genomes expressed in nature are of unknown function. By investigating this material in the lab and field we are discovering key, previously unidentified environmental controls and responses of phytoplankton as well as distributional information. Here, we will explore phytoplankton diversity and factors for bloom development at three levels of granularity – basic growth requirements in the context of microbial networks (in this case vitamins), evolutionary divergence (in connection to nutrient limitation), and population connectivity through deep ocean currents (using repetitive, gene-interrupting sequences). Through iterative modeling, lab, and field experiments it should be possible to test and integrate ecologically relevant levels of microbial diversity to understand primary production in transitioning ecosystems.
20150506T121000
20150506T130000
54-915
0
SLS – Alex Worden (Monterey Bay Aquarium Research Institute) Phytoplankton, microbial networks and the global carbon cycle
e9kl3qtlgunh2po6ib0kspvuto@google.com
20180502T144718Z
MIT Seminar | Microbial Systems and Beyond (Parsons Lab)
Microbial Systems Seminar
https://microbialsystems.wordpress.com/spring-2015/
Apr 29
Mathieu Groussin, Alm Lab, MIT
“Disentangling the effects of host phylogeny and diet in mammalian
microbiomes."
Seminars take place in the Parsons Laboratory for Environmental Science and Engineering [MIT building 48 room 316] on Wednesdays between 4:00-5:00PM.
20150506T160000
20150506T170000
0
Mathieu Groussin – “Disentangling the effects of host phylogeny and diet in mammalian microbiomes.”
srcsenv4qa9tj0iulgqgf37mfc@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
The evolution of crustacean metamorphosis: Integrating phylogenomics,fossils, and development
Dr. Jo Wolfe
Dept. of Earth and Planetary Sciences, MIT
and Sackler Institute for Comparative Genomics,
American Museum of Natural History
Abstract
20150507T120000
20150507T130000
Redfield Auditorium
0
Dr. Jo Wolfe
eu60niksodc53b8umgblu9hq3s@google.com
20180502T144718Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
http://eps.jhu.edu/directory/naomi-levin/
20150508T100000
20150508T110000
E25-117
0
COG3 Seminar – Naomi Levin (Johns Hopkins University)
9vmm93g6p7gf3u8an5pue6p2i4@google.com
20180502T144718Z
MIT Seminar | PAOC Houghton Lectures
David Battisti
Professor of Atmospheric Sciences
Univ. of Washington
20150508T140000
20150508T153000
MIT, 54-915
0
Houghton Lecture – Quantifying climate forcings and feedbacks in coupled climate simulations of the last millennium.
ub84g3og21o7js7ossrvn7saig@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
The Brazil Current is probably the least known and explored of the western boundary currents of the world ocean. In this talk, we offer an overview of research carried out at the Oceanographic Institute of the University of São Paulo (IOUSP) on this current system's pattern, water masses and mesoscale variability. By blending small quasi-synoptic data sets, mooring data and simple process-oriented modeling, we propose an extension of the seminal work by Henry Stommel (1965). The BC system is described from its site of origin (~15S) to where its starts to separate from the continental margin, south of 35S.
20150512T150000
20150512T160000
Clark 507
0
Ilson da Silveira, Universidade de São Paulo. ‘The Brazil Current revisited: Beyond Stommel’s (1965) pioneering insights’. Clark 507.
e0lr5udf6dcsor5o2cbs9fui2o@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
The Antarctic Slope Front (ASF) almost completely encircles the Antarctic continent, separating cold shelf waters from relatively warm Circumpolar Deep Water (CDW) at mid-depth offshore. Exchanges across the ASF transport CDW toward marine-terminating glaciers, and export Antarctic Bottom Water (AABW) to the abyssal ocean. Recent studies indicate that this exchange may be modulated by mesoscale eddies, which facilitate cross-slope exchanges via stirring along isopycnals and eddy bolus transports. In this seminar I will discuss physical controls over the rates of cross-slope water mass exchange, and examine the dynamical balances governing cross-slope eddy transfer.
I will first present a recently-developed eddy-resolving process model of the Antarctic continental shelf and slope. The model enforces realistic offshore ocean stratification over idealized shelf/slope bathymetry, in order to provide a realistic representation of the water masses in a configuration that can be analyzed cleanly. The model forcing includes a westward wind stress over the continental slope and buoyancy loss on the continental shelf, consistent with prevailing Antarctic easterly winds and brine rejection in coastal polynyas.
I will use this model to explore the sources of eddy kinetic energy (EKE) over the continental slope, and its resulting impact on the cross-slope transport of mass and tracers. I will show that the upper-ocean dynamics resemble the Antarctic Circumpolar Current, with wind-driven northward shoaling of the pycnocline resisted by baroclinic conversion of potential energy to EKE. By contrast, close to the ocean bed (at the CDW/AABW interface) potential energy is removed by both the wind-driven mean overturning and the generation of baroclinic eddies, and is instead sourced from the buoyancy loss on the continental shelf. This EKE source turns out to be sensitive to variations in the model surface forcing and bathymetry. Consequently, relatively small changes in the forcing and geometry can produce a substantial rearrangement of the water mass pathways and volume transports across the continental slope. These findings suggest that shoreward eddy transport of CDW should be localized to a few favorable locations around the Antarctic shelf break, and that future changes in the easterly wind strength or coastal polynya productivity could significantly alter the shoreward heat transport and the properties of the outflowing AABW.
20150513T121000
20150513T130000
54-915
0
SLS – Andrew Stewart (UCLA) – Eddy transport and mixing across the Antarctic continental slope
ogg9r5fr7ahv706t7amre146f8@google.com
20180502T144718Z
MIT Seminar | Microbial Systems and Beyond (Parsons Lab)
Microbial Systems Seminar
https://microbialsystems.wordpress.com/spring-2015/
May 13
Jennifer Talbot, Boston University
“Microbial diversity and the carbon cycle: insights from soil fungal communities”
Seminars take place in the Parsons Laboratory for Environmental Science and Engineering [MIT building 48 room 316] on Wednesdays between 4:00-5:00PM.
20150513T160000
20150513T170000
15 Vassar Street, Cambridge, MA 02139
0
CANCELLED – Jennifer Talbot – “Microbial diversity and the carbon cycle: insights from soil fungal communities”
pr7hbd1l3ko37qtqmml8huqa7k@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Molecular Physiology of Calanus finmarchicus
Dr. Ann Tarrant
Associate Scientist
WHOI Biology Department
Abstract
20150514T120000
20150514T130000
Redfield Auditorium
0
Dr. Ann Tarrant
fifj494qb1lu2nt5j49v9jala0@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Abstract: Fixed nitrogen availability can regulate atmospheric carbon dioxide concentrations and climate as a whole. Its loss via two anaerobic microbial processes – anammox and denitrification – only occurs where oxygen is sufficiently depleted. Field experiments in the tropical Pacific oxygen minimum zone resolve two long-standing debates critical to understanding global climate. While very low oxygen concentrations are required for fixed nitrogen loss by either anammox or denitrification, organic matter quantity and quality determine the magnitudes of these rates and the partitioning between the two pathways. Dissolved oxygen concentrations also decouple the denitrification steps, allowing for net production of nitrous oxide and accentuating the importance of the oxygen and nitrogen cycles in regulating climate.
20150514T133000
20150514T143000
54-915
0
SLS – Andrew Babbin (MIT) Anaerobic cycling of marine nitrogen
f9n7q1clvrqar5vn39me4mnrtk@google.com
20180502T144718Z
MIT Seminar | PAOC Houghton Lectures
Dr. William Randel
Senior Scientist and Head for Remote Sensing, Atmospheric Chemistry
Observations and Modeling Laboratory, NCAR
The global upper troposphere - lower stratosphere (UTLS) is a transition region of strong dynamical and chemical variability, with contrasts in circulation and chemical behavior between the troposphere and stratosphere. This region exhibits complex dynamical, radiative, and chemical characteristics that place stringent requirements on observing and modeling systems. These lectures will focus on a series of topics related to the observed behavior of UTLS circulation, transport and chemical variability, as derived from satellite measurements combined with meteorological data sets.
20150519T110000
20150519T120000
MIT, 54-915
0
Houghton Lecture – Overview and Global Circulation
giej4fotj8s93pcbu6239r3et8@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
The impact of the North Atlantic Oscillation (NAO) on the Atlantic Meridional Overturning Circulation (AMOC) and large-scale climate is assessed using simulations with three different climate models. Perturbation experiments are conducted in which a pattern of anomalous heat flux corresponding to the NAO is added to the model ocean; in companion experiments no such flux is added. Differences between the experiments illustrate how the model ocean and climate system respond to the NAO. A positive phase of the NAO tends to strengthen the AMOC by extracting heat from the subpolar gyre, thereby increasing deepwater formation, horizontal density gradients, and the AMOC. The flux forcings have the spatial structure of the observed NAO, but the amplitude of the forcing varies sinusoidally in time with distinct periods varying from 2 to 200 years. The response of the AMOC to NAO variations is small at short time scales, but increases up to the dominant time scale of internal AMOC variability (20-30 years for the models used). The amplitude of the response of the AMOC, and associated oceanic heat transport, is approximately constant as the timescale of the forcing is increased further. In contrast, the response of other properties, such as hemispheric surface air temperature or Arctic sea ice, continues to increase as the time scale of the forcing becomes progressively longer. The larger response of temperature and sea ice at progressively longer time scales is associated with an increased impact of radiative feedback processes. The impact of the NAO-induced AMOC variations extends to the Southern Ocean as well, inducing variations in surface and interior ocean properties. This relationship results in some skill in decadal prediction of aspects of the Southern Ocean.
20150519T150000
20150519T160000
Clark 201
0
Tom Delworth, GFDL. ‘The impact of the North Atlantic Oscillation on climate through its influence on the Atlantic Meridional Overturning Circulation’. Clark 201.
g3ehmberbdu54vh6631pnu10ug@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Abstract: During the termination of the last ice age, atmospheric CO2 increased by ~30% and global temperature rose by several degrees, yet the mechanism(s) driving these major changes remain elusive. Marine and terrestrial records indicate that the amount of CO2 stored in the deep sea is greater during glacial periods than interglacial periods. The implied net transfer of carbon into and out of the ocean is likely the result of changes in ocean circulation and/or the efficiency of the biologic pump. The resulting atmospheric CO2 fluctuations may play some role in amplifying temperature shifts across ice age cycles. In this study, we reconstruct past variations in seawater carbonate ion concentration in order to gain insight into the relative roles of different oceanic CO2 storage mechanisms and to place constraints on the timing, magnitude, and location of subsequent deep ocean ventilation. Our reconstruction is based on the trace element and stable isotopic composition of calcite shells of the epi-benthic foraminifer Cibicidoides wuellerstorfi from a sediment core in New Zealand's Bay of Plenty. The sediment core site (1,627 m water depth) lies within the upper limit of modern Circumpolar Deep Water (CDW), ~500 m below the local Antarctic Intermediate Water (AAIW) salinity minimum. A record of ΔCO32- derived from the foraminiferal boron to calcium ratio (B/Ca) provides evidence for greater ice-age storage of respired CO2 and also reveals abrupt deglacial shifts in inorganic carbon chemistry up to 30 µmol/kg (5 times larger than the difference between average LGM and Holocene values). The rapidity of these deglacial changes in the ocean interior suggests 1) fluctuations in the intermediate-deep water boundary near the core site, and/or 2) rapid changes in deep water composition. Additional records are currently being reconstructed to probe these possibilities.
20150520T121000
20150520T130000
54 915
0
SLS – Katherine Allen (Rutgers University) The Ocean’s Role in Ending an Ice Age: A View from the South Pacific
0c20di68jierltgmugq4quf6pc@google.com
20180502T144718Z
MIT Seminar | Microbial Systems and Beyond (Parsons Lab)
Microbial Systems Seminar
https://microbialsystems.wordpress.com/spring-2015/
May 20
"Metabolic inference: Can we bridge the gap between microbial community structure and ecosystem function?"
Jeff Bowman
Postdoctoral Fellow
Lamont-Doherty Earth Observatory
www.polarmicrobes.org
Seminars take place in the Parsons Laboratory for Environmental Science and Engineering [MIT building 48 room 316] on Wednesdays between 4:00-5:00PM.
20150520T160000
20150520T170000
15 Vassar Street, Cambridge, MA 02139
0
Jeff Bowman – “Metabolic inference: Can we bridge the gap between microbial community structure and ecosystem function?”
nomjqudjmlgo5l9q72orgmks5o@google.com
20180502T144718Z
MIT Seminar | PAOC Houghton Lectures
Dr. William Randel
Senior Scientist and Head for Remote Sensing, Atmospheric Chemistry
Observations and Modeling Laboratory, NCAR
The global upper troposphere - lower stratosphere (UTLS) is a transition region of strong dynamical and chemical variability, with contrasts in circulation and chemical behavior between the troposphere and stratosphere. This region exhibits complex dynamical, radiative, and chemical characteristics that place stringent requirements on observing and modeling systems. These lectures will focus on a series of topics related to the observed behavior of UTLS circulation, transport and chemical variability, as derived from satellite measurements combined with meteorological data sets.
20150521T110000
20150521T120000
MIT, 54-915
0
Houghton Lecture – Stratospheric Temperature Trends
t3bv4b3p5a7r3ke93mf97b0nm8@google.com
20180502T144718Z
MIT Seminar | PAOC Houghton Lectures
Dr. William Randel
Senior Scientist and Head for Remote Sensing, Atmospheric Chemistry
Observations and Modeling Laboratory, NCAR
The global upper troposphere - lower stratosphere (UTLS) is a transition region of strong dynamical and chemical variability, with contrasts in circulation and chemical behavior between the troposphere and stratosphere. This region exhibits complex dynamical, radiative, and chemical characteristics that place stringent requirements on observing and modeling systems. These lectures will focus on a series of topics related to the observed behavior of UTLS circulation, transport and chemical variability, as derived from satellite measurements combined with meteorological data sets.
20150526T110000
20150526T120000
MIT, 54-915
0
Houghton Lecture – Asian monsoon anticyclone
6ccmrqqsetuqttr3b0u5iohm7o@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150526T150000
20150526T160000
Clark 507
0
Ken Brink, WHOI. ‘Continental shelf baroclinic instability with fluctuating wind forcing’. Clark 507
vvbkd9tl87kjotiqupdb4ao140@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
20150527T121000
20150527T130000
54-915
0
SLS
mm9hojplisf5pp3g1ptkpsfflk@google.com
20180502T144718Z
MIT Seminar | PAOC Houghton Lectures
Dr. William Randel
Senior Scientist and Head for Remote Sensing, Atmospheric Chemistry
Observations and Modeling Laboratory, NCAR
The global upper troposphere - lower stratosphere (UTLS) is a transition region of strong dynamical and chemical variability, with contrasts in circulation and chemical behavior between the troposphere and stratosphere. This region exhibits complex dynamical, radiative, and chemical characteristics that place stringent requirements on observing and modeling systems. These lectures will focus on a series of topics related to the observed behavior of UTLS circulation, transport and chemical variability, as derived from satellite measurements combined with meteorological data sets.
20150528T110000
20150528T120000
MIT, 54-915
0
Houghton Lecture – Stratopheric water vapor
2vd8fahrdi36qot6mkdk84k9cg@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Physical Control of the Distributions of a
Key Arctic Copepod in the Northeast
Chukchi Sea
Mr. Stephen Elliott
MIT-WHOI Joint Program
and U.S. Coast Guard
Abstract
20150528T120000
20150528T130000
Redfield Auditorium
0
Mr. Stephen Elliott
pvh55vrk3hj3fp22qqs9ptn7c0@google.com
20180502T144718Z
MIT Seminar | PAOC Houghton Lectures
Dr. William Randel
Senior Scientist and Head for Remote Sensing, Atmospheric Chemistry
Observations and Modeling Laboratory, NCAR
The global upper troposphere - lower stratosphere (UTLS) is a transition region of strong dynamical and chemical variability, with contrasts in circulation and chemical behavior between the troposphere and stratosphere. This region exhibits complex dynamical, radiative, and chemical characteristics that place stringent requirements on observing and modeling systems. These lectures will focus on a series of topics related to the observed behavior of UTLS circulation, transport and chemical variability, as derived from satellite measurements combined with meteorological data sets.
20150601T110000
20150601T120000
MIT, 54-915
0
Houghton Lecture – Tropical tropopause layer
1mhk2k6n73243epihbavrpp13c@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150602T150000
20150602T160000
Clark 507
0
Uriel Zajaczkovski, Scripps. ‘Southern Ocean eddies: propagation, energy sources and the role of topography’. Clark 507.
ff8acuj0ouic1ga8g808v7meo0@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
20150603T121000
20150603T130000
54-915
0
SLS
0s95uep1qshbtthh4mjo86v934@google.com
20180502T144718Z
MIT Seminar | PAOC Houghton Lectures
Dr. William Randel
Senior Scientist and Head for Remote Sensing, Atmospheric Chemistry
Observations and Modeling Laboratory, NCAR
The global upper troposphere - lower stratosphere (UTLS) is a transition region of strong dynamical and chemical variability, with contrasts in circulation and chemical behavior between the troposphere and stratosphere. This region exhibits complex dynamical, radiative, and chemical characteristics that place stringent requirements on observing and modeling systems. These lectures will focus on a series of topics related to the observed behavior of UTLS circulation, transport and chemical variability, as derived from satellite measurements combined with meteorological data sets.
20150603T133000
20150603T143000
MIT, 54-915
0
Houghton Lecture – Tropical variability observed in GPS data
cavlmq4vhjc0akk4uq7euepp3o@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Enhancing the conservation of river herring through ecological investigation
Dr. Andrew Jones
Postdoctoral Scholar
WHOI Biology Department
Abstract
20150604T120000
20150604T130000
Redfield Auditorium
0
Dr. Andrew Jones
poltmskhe21j1ic87v76rhesf8@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150609T150000
20150609T160000
Clark 201
0
Young-Oh Kwon, WHOI. ‘Year-to-year re-outcropping of Eighteen Degree Water in an eddy-resolving ocean simulation’. Clark 201.
0dgmiq693qkgb4m0iotgb1sib8@google.com
20180502T144718Z
MIT Seminar | Microbial Systems and Beyond (Parsons Lab)
Microbial Systems Seminar
https://microbialsystems.wordpress.com/spring-2015/
June 10
*** Note unusual time: 1:00-2:00 PM"
"Exploiting Anaerobes for Biomass Breakdown and Sustainable Chemistry"
Michelle O'Malley
University of California, Santa Barbara
http://omalleylab.weebly.com/
Seminars take place in the Parsons Laboratory for Environmental Science and Engineering [MIT building 48 room 316] on Wednesdays .
20150610T130000
20150610T140000
0
Michelle O’Malley – “Exploiting Anaerobes for Biomass Breakdown and Sustainable Chemistry”
9ivhkfp07e5p4n8cvqmj3ai6v0@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Tune in, turn on, drop out: Soundscapes as a larval settlement cue for reef-building marine invertebrates
Dr. Ashlee Lillis
Postdoctoral Scholar
WHOI Biology Department
Abstract
20150611T120000
20150611T130000
Redfield Auditorium
0
Dr. Ashlee Lillis
daes58s3elgu9tgm8pvh74aa30@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150616T150000
20150616T160000
Clark 507
0
Tom Connolly, WHOI. ‘Surface waves and exchange across the inner shelf’. Clark 507.
bqa9bbg5pik429ss56tsoauhv4@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Who you hang out with matters: Indirect genetic effects on cooperation in guppies, Poecilia reticulata
Dr. Bronwyn Heather Bleakley
Assistant Professor of Biology
Stonehill College
Abstract
20150618T120000
20150618T130000
Redfield Auditorium
0
Dr. Bronwyn Heather Bleakley
41i45du12hj9p5elhg8b88rab8@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150618T140000
20150618T150000
Clark 201
0
Sanjeeva Balasuriya, University of Adelaide. ‘Flow barriers and flux in unsteady flows’. Clark 201
rt5o22uqg1jm1jk48nkek6b99c@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150623T150000
20150623T160000
Clark 507
0
Larry Pratt, WHOI. ‘Resonant stirring and mixing in an idealized model of an eddy’. Clark 507.
cc2ukdhr849h4q2tqrjfg1l190@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Social behaviour: linking the individual
to group function
Sofia Ibarraran, Ph.D.
Guest Researcher
Virginia Edgcomb Lab, WHOI
Abstract
20150625T120000
20150625T130000
Redfield Auditorium
0
Dr. Sofia Ibarraran
54vndurckkf737eknmjqml0j58@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150625T140000
20150625T150000
Clark 507
0
Pierre-Yves Passaggia, UNC. ‘Bifurcation and global stability analysis of horizontal convection.’ Clark 507
ehlikb3q0cnm611oo4gq9jvj70@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150630T150000
20150630T160000
Clark 507
0
Raffaele Ferrari, MIT. ‘Turning ocean mixing upside down’. Clark 507.
vgk0clshhmbn65nmbifavs0518@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Ecosystem evolution in the wake of ice
shelf disintegration along the
NW Weddell Sea, Antarctica
Dr. Mattias Cape
Postdoctoral Scholar
WHOI
Abstract
20150702T120000
20150702T130000
Redfield Auditorium
0
Dr. Mattias Cape
v64t7cuibqlarnl27an3i6beb4@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150707T150000
20150707T160000
Clark 507
0
Tom Sanford and Ren-Chieh Lien, APL-UW. ‘The Hunt for the Elusive Vortical Mode’. Clark 507
rkpfl4jp1temrr3g10gbt6gcns@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Interactions between jellyfish and marine fish and fisheries:
insights into fisheries sustainability
Dr. Richard Brodeur
Senior Scientist
Northwest Fisheries Science Center, NOAA
Abstract
20150709T120000
20150709T130000
Redfield Auditorium
0
Dr. Richard Brodeur
8ruuglad8cl6d9snsskla1o4d8@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
Mixing in near-integrable flows with a clear separation of time or spacial scales is notoriously difficult to achieve. In many flows the intrinsic symmetries create invariant surfaces that act as barriers to chaotic advection and mixing. Thus, a key to efficient mixing is to add to the original (symmetric) flow a certain kind of perturbation that destroys those symmetries. In the present talk we discuss a quantitative long-time theory of mixing due to the presence of resonances in 3-D near-integrable Stokes flows. The resonance phenomena, such as scattering on resonance, capture into resonance, and separatrix crossings, involving different components of the original flow and the perturbation may destroy the invariant surfaces, paving a way to the large-scale mixing in a big fraction of the fluid flow. We explain the extend and the rate of mixing in terms of the evolution of the adiabatic invariants of the system. We show that when the leading phenomenon is scattering on resonances or separatrix crossings, the resulting mixing can be described in terms of a single 1-D diffusion-type equation, with parameters of the diffusion equation defined by the averaged statistics of a single passage through resonance or separatrix.
20150709T140000
20150709T150000
Clark 201
0
Dmitri Vainchtein, Temple University. ‘Resonances and Mixing in Multi-scale Flows’. Clark 201
k2a6v78es75p0tkb85oep69808@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150714T150000
20150714T160000
Clark 507
0
Laura Slivinski, WHOI. ‘Applications of Lagrangian Data Assimilation to Katama Bay, MA’. Clark 507.
qmea5cild7c37mqh7ietcl8vcg@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Asking the Auks About Atlantic Arctic Abnormalities
Dr. Nina Karnovsky
Associate Professor, Pomona College and
Visiting Scientist, MBL
Abstract
20150716T120000
20150716T130000
Redfield Auditorium
0
Dr. Nina Karnovsky
trl8okotv6pj6iin45vtmlc4jo@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150716T140000
20150716T150000
Clark 201
0
Alex Soloviev, Nova Southeastern U. ‘3D Dynamics of the Near-Surface Layer of the Ocean: Field and Computational Fluid Dynamics Experiments’. Clark 201
dmbu7fjup8o2vqslmj9ambf1j4@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
The interaction between an Antarctic Circumpolar Current-like channel flow and a continental shelf break is considered using eddy-permitting simulations of a quasi-geostrophic and a primitive equation model. The experimental setup is motivated by the continental shelf of the West Antarctica Peninsula. Numerical experiments are performed to study how the width and slope of an idealized continental shelf topography affect the characteristics of the flow. The main focus is on the regime where the shelf break width is slightly greater than the eddy scale. In this regime, a strong baroclinic jet develops on the shelf break due to the locally stabilizing effect of the topographic slope. The velocity of this jet is set at first order by the gradient of the background barotropic geostrophic contours, which is dominated by the slope of the topography. At statistical equilibrium, an aperiodic cycle is observed. Initially, over a long stable period, an upper-layer jet develops over the shelf break. Once the vertical shear reaches the critical condition for baroclinic instability, the jet becomes unstable and drifts away from the shelf break. The cross-shelf mixing is intrinsically linked with the jet drifting, as most of the meridional flux occurs during this instability period. Investigation of the zonal momentum budget reveals that a strong Reynolds stress divergence inversion across the jet is associated with a drifting event, accelerating one flank of the jet and decelerating the other. The hypothesis that jet drifting may be due to one flank of the jet being more baroclinically unstable than the other, is tested using topographic profiles with variable curvatures.
20150721T150000
20150721T160000
Clark 201
0
Alon Stern, GFDL/Princeton U. ‘Instability and mixing of zonal jets along an idealized continental shelf break’. Clark 201
4f5ihduahg5bhbga9um5b86788@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150728T150000
20150728T160000
Clark 507
0
Georgy Manucharyan, WHOI. ‘Wind-driven halocline dynamics of the Beaufort Gyre’. Clark 507.
kbkeqvribk81n1cvjg7quj5npk@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Entanglement in North Atlantic right whales: sublethal impacts on drag, movement, and energetic cost
Ms. Julie van der Hoop
Ph.D. Candidate
MIT-WHOI Joint Program
Abstract
20150730T120000
20150730T130000
Redfield Auditorium
0
Ms. Julie van der Hoop
qbhtrfh7gkrf198ofdo4clhslc@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150804T150000
20150804T160000
Clark 507
0
Alexey Fedorov, Yale. ‘The “super” El Nino of 2014 that never happened and global warming hiatus.’ Clark 507
EC1760C8-CDD6-4052-8321-B2733CCA54F8
20180502T144718Z
WHOI Seminar | Biological Oceanography
Special Biology Department Event
Redfield Auditorium, 3:30pm: Summer Student speed talks
Redfield Lobby, 4:00pm: Poster session
This event—with refreshments!—will feature the Biology Department’s Summer Student Researchers. We expect at least 12 students presenting. We will begin in the Redfield Auditorium with 1-slide, 2-minute speed talks given by each of the students to entice you to come visit their posters. The poster session will then be held in the Redfield Lobby. Please come and see the great research these students have been conducting this summer!
20150807T153000
20150807T180000
Redfield Auditorium and Lobby
0
Biology Department Summer Student Research Forum
h6ko2jrbvbfstkfmkb98v7et3c@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150811T150000
20150811T160000
Clark 507
0
Wilken-Jon von Appen, Alfred Wegener Institute. ‘Seasonal cycle of mesoscale instability of the West Spitsbergen Current’. Clark 507.
ls6o7ub8auc2jkb0g616sie9l4@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150818T150000
20150818T160000
Clark 507
0
Trevor McDougall, U. New South Wales, ‘How does the deep ocean manage to achieve upwelling since the interior diapycnal velocity is downwards? and, On the thermodynamics of seawater and frazil ice’, Clark 507
23gbqk88ctred6ivk8qibqcr10@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Please, …, I Want Some More - A Perspective on WHOI's "Business" Model
Dr. Bernhard Peucker-Ehrenbrink
Senior Scientist
WHOI Marine Chemistry and Geochemistry Department
20150820T120000
20150820T130000
Redfield Auditorium
0
Dr. Bernhard Peucker-Ehrenbrink
kiuh038rfcblv51dkiso35vac0@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150824T140000
20150824T150000
Clark 201
0
Louis Clement, LDEO. ‘Generation of internal waves by eddies impinging at the western boundary of the North Atlantic’. Clark 201.
4fir0ubk8l1knopuj9k02c8rhg@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150825T150000
20150825T160000
Clark 507
0
John Marshall, MIT. ‘Response of the ocean to volcanic eruptions’. Clark 507.
k4fnk1engv8ecrajisvvdn8nqs@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Connectivity among populations -- the never ending story?
Michael J. Kingsford, Ph.D
Distinguished Professor
College of Marine & Environmental Sciences
James Cook University, Australia
Abstract
20150903T120000
20150903T130000
Redfield Auditorium
0
Dr. Michael J. Kingsford
qlu6l9k8sm4t8otarnnb6cvmkg@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Empowering the Woman Scientist
Dr. Clarice Yentsch
Adjunct Professor
Nova Southeastern University
Abstract
**Sponsored by WHOI Women's Committee**
20150910T120000
20150910T130000
Redfield Auditorium
0
Dr. Clarice Yentsch
eoscs2ep8hvtpdm2sesnj3d350@google.com
20180502T144718Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
New Insights into Earth’s oxygenation
20150911T100000
20150911T110000
20150918T100000
20150925T100000
20151002T100000
20151009T100000
20151016T100000
20151023T100000
20151030T100000
20151106T100000
20151113T100000
20151120T100000
20151127T100000
20151204T100000
20151211T100000
20151218T100000
E25-119
FREQ=WEEKLY;COUNT=15;BYDAY=FR
0
COG3 Seminar – Noah Planavsky (Yale)
494vrr1rgff3hm9ok3dnii7u0o@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150915T150500
20150915T160000
Clark 507
0
Magdalena Andres, WHOI. ‘Line W and SYNOP: Does Deep Cyclogenesis under Gulf Stream Meanders Influence the DWBC?’. Clark 507
tjt8djodhuj2o0rs2n05q2ncn0@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
The abyssal ocean during the last glacial period is widely believed to have been
comparatively strongly salt stratified and close to the freezing point of sea water. Much
of the support for that view is based on the work of McDuff, Schrag, Adkins, M. Miller
and several others who analyzed the chlorinity and oxygen isotope ratios from the pore
waters of deep sea cores. The data represent what, in terms of control theory, is termed a
"terminal constraint". That theoretical framework is used to revisit the inferences about
the LGM abyssal properties, and in particular, to understand the degree to which they are
robust to sometimes plausible assumptions about the data.
20150916T121000
20150916T130000
54-915
0
SLS – Carl Wunsch (MIT)- Salinity and Temperature of the Abyssal Ocean at the Last Glacial Maximum (LGM)
20150918T100000-eoscs2ep8hvtpdm2sesnj3d350@google.com
20180502T144718Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20150918T100000
20150918T110000
E25-119
0
COG3 Seminar – Clara Blättler (Princeton)
jobcn33na9eg6af2iiso54alf0@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150922T150500
20150922T160000
Clark 507
0
X. San Liang, Nanjing Institute of Meteorology. ‘Rigorous causality quantification between time series and applications to ocean data analysis’. Clark 507.
sp1de2gn36rb15tpcgt2vona9k@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
20150923T121000
20150923T131000
54-915
0
SLS – Trevor McDougall (UNSW) – The thermodynamics of the turbulent ocean and of ice; what we know and what things are still a puzzle
m5tv3f6qp5dkv8o5d96s8ud6s8@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Omura’s whales (Balaenoptera omurai)
off northwest Madagascar: a first
ecological description of the species
Dr. Salvatore Cerchio
WHOI Guest Investigator
Research Scientist
New England Aquarium
Abstract
20150924T120000
20150924T130000
Redfield Auditorium
0
Dr. Salvatore Cerchio
20150925T100000-eoscs2ep8hvtpdm2sesnj3d350@google.com
20180502T144718Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20150925T100000
20150925T110000
E25-119
0
COG3 Seminar – Greg Henkes (Harvard)
nll8o321cqot543r1th5heb75c@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20150929T150500
20150929T160000
Clark 507
0
M. Dolores Pérez-Hernández, WHOI. ‘The Canary Basin contribution to the seasonal cycle of the Atlantic Meridional Overturning Circulation at 26ºN’. Clark 507.
cro8mu7efln5cf3lqf30ma4u34@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
The Brazil Current (BC) is probably the least known and explored of the western boundary currents of the world ocean. In this talk, we offer a brief overview of the research carried out at the Oceanographic Institute of the University of São Paulo (IOUSP) on this current system's general pattern, water masses and meridionally changing vertical structure. We focus here on the latitude range (21S26S) at which the BC vertical structure very closely approaches the one predicted in the seminal work by Henry Stommel (1965). We explore the spatial temporal variability and conduct some firstorder dynamical studies of this "Stommelian" BC by blending quasisynoptic data sets, mooring data and simple process oriented modeling.
20150930T121000
20150930T131000
54-915
0
SLS – Ilson Carlos Almeida da Silveira (LaDO) – A “Stommelian” Brazil Current at 21S-26S: vertical structure and mesoscale variability
20150930T160000-7spt55o3dc4vfua59bh4a2hnvs@google.com
20180502T144718Z
MIT Seminar | Microbial Systems and Beyond (Parsons Lab)
Microbial Systems Seminar
https://microbialsystems.wordpress.com
Jennifer Talbot
Boston University
"Microbial diversity and the carbon cycle: insights from soil fungal communities"
https://microbesatbu.wordpress.com/
Seminars take place in the Parsons Laboratory for Environmental Science and Engineering [MIT building 48 room 316] on Wednesdays between 4:00-5:00PM.
20150930T160000
20150930T170000
MIT building 48-316, 15 Vassar Street, Cambridge, MA 02139
0
Jennifer Talbot – “Microbial diversity and the carbon cycle: insights from soil fungal communities”
7spt55o3dc4vfua59bh4a2hnvs@google.com
20180502T144718Z
MIT Seminar | Microbial Systems and Beyond (Parsons Lab)
Microbial Systems Seminar
https://microbialsystems.wordpress.com
Speaker
Home
Title
Page
Seminars take place in the Parsons Laboratory for Environmental Science and Engineering [MIT building 48 room 316] on Wednesdays between 4:00-5:00PM.
20150930T160000
20150930T170000
20150930T160000
20151007T160000
20151014T160000
20151021T160000
20151028T160000
20151104T160000
20151111T160000
20151118T160000
20151125T160000
20151202T160000
20151209T160000
20151216T160000
MIT building 48-316, 15 Vassar Street, Cambridge, MA 02139
FREQ=WEEKLY;UNTIL=20151216T210000Z;BYDAY=WE
0
Microbial Systems Seminar
j10prucs4o1nimnteutbtuefb0@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
The capital-income breeding
continuum in fishes
Richard S. McBride, Ph.D.
Supervisory Research Fishery
Biologist, Northeast Fisheries
Science Center, National Marine
Fisheries Service, Woods Hole, MA
Abstract
20151001T120000
20151001T130000
0
Dr. Richard S. McBride
u4umqbrbhtpeipp8vktes60ics@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
Clark 507
20151006T150500
20151006T160000
the western Nordic Seas under changing atmospheric conditions'. Clark 507
0
Kjetil Våge, U. Bergen. ‘Wintertime convection in the western Nordic Seas under changing atmospheric conditions’. Clark 507
hsqb5mfg6baavv7utsoo79kv20@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
With the explosion of exoplanet discoveries and atmospheric characterization over the last decade, there is now the hope that in the near future, it will be possible to study the atmospheres of low mass, possibly Earthlike exoplanets. Interpreting these observations will be a grand challenge, because the diversity of rocky planet climates is likely to be enormous. Here I discuss the role that theory and idealized modeling can play in advancing our understanding of the possibilities. I present results on two key problems in exoplanet climate evolution: the loss of a planet’s water to space and the circulation (and possible nightside collapse) of atmospheres on tidally locked planets. I show that in both cases, scaling analysis allows the fundamentals of the problem to be understood in a robust and general way. I discuss the implications of these results for exoplanet habitability and the future search for biosignatures by groundand spacebased telescopes.
20151007T121000
20151007T131000
54-915
0
SLS – Robin Woodsworth (Harvard) – What can theory teach us about the climates of low-mass exoplanets?
20151009T100000-eoscs2ep8hvtpdm2sesnj3d350@google.com
20180502T144718Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
A New Perspective on the Indian Monsoon from Paleogene to Holocene
20151009T100000
20151009T110000
E25-119
0
COG3 Seminar – Livu Giosan (WHOI)
87t795erdc0ok67ga6as2sgk2o@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20151013T150500
20151013T160000
Clark 507
0
Kerry Cook, U. Texas Austin. ‘The West African Monsoon: Dynamics of the monsoon jump and recent trends’. Clark 507.
q08g85divlio3s4ek47ihnfoog@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
In situ cosmogenic nuclides are produced in surface materials exposed to cosmic radiation - cover a landscape with ice and production ceases; erode down into a landscape and nuclide concentrations quickly decrease. We used these simple observations to explore a new proxy for reconstructing past ice sheet variability- the 10Be concentration of sand in marine sediments adjacent to glaciated continents, which should reflect the exposure and erosion history on land before the sediment was deposited in the deep sea.
This talk will present cosmogenic nuclide records from two Ocean Drilling Program cores off east Greenland and the ANDRILL-1B core next to the East Antarctic Ice Sheet spanning the past 8 Myr, as well as 10Be measurements on contemporary sediments emanating from the southern Greenland Ice Sheet today. Notable features of the Greenland record include a 50-fold long-term decline in 10Be concentration reflecting late Cenozoic ice-sheet growth, pronounced 10Be dips coincident with major ice-rafted debris pulses, considerable variability during the early Pleistocene, and low concentrations indistinguishable from contemporary sediments throughout the past 1 Myr. The Antarctic record, on the other hand, exhibits very low 10Be concentrations over its entire length, suggesting little to no subaerial exposure of land where the sediment was sourced from during the past 8 Myr.
20151014T121000
20151014T131000
54-915
0
SLS – Jeremy Shakun (Boston College)- Using cosmogenic isotopes in marine sediment cores to decipher long-term Greenland and Antarctic Ice Sheet behavior
20151014T160000-7spt55o3dc4vfua59bh4a2hnvs@google.com
20180502T144718Z
MIT Seminar | Microbial Systems and Beyond (Parsons Lab)
Microbial Systems Seminar
https://microbialsystems.wordpress.com
Frederique Le Roux
Station Biologique
"Oyster as a model to investigate the functional units of Vibrio pathogenesis”
http://www.sb-roscoff.fr/fr/le-roux-frederique/54
Seminars take place in the Parsons Laboratory for Environmental Science and Engineering [MIT building 48 room 316] on Wednesdays between 4:00-5:00PM.
20151014T160000
20151014T170000
MIT building 48-316, 15 Vassar Street, Cambridge, MA 02139
0
Frederique Le Roux – “Oyster as a model to investigate the functional units of Vibrio pathogenesis”
mei5e2dv5n7tve4rmlg1f0fkic@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20151015T140000
20151015T150000
Clark 201
0
Femke de Jong, Duke. ‘Eddies in the Labrador Sea: Part 2’ Clark 201
20151016T100000-eoscs2ep8hvtpdm2sesnj3d350@google.com
20180502T144718Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Deglaciation to dam removal: climatic and land-use controls on New England river processes
20151016T100000
20151016T110000
E25-119
0
COG3 Seminar – Noah Snyder (Boston College)
br1kst6f32gqppv5fj4969cdhg@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20151020T150500
20151020T160000
Clark 201
0
Ali Mashayek, MIT. ‘Topographic Enhancement of Vertical Mixing in the Southern Ocean’. Clark 201
j02i76ignm8l356jekcpoq13i8@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Many aspects of how natural phytoplankton communities change through time remain poorly understood, in large part because traditional organism-level sampling strategies are not amenable to high frequency, long duration application. To overcome aspects of this limitation, we developed the FlowCytobot series of automated submersible flow cytometers capable of rapid, unattended analysis of individual plankton cells for long periods of time. FlowCytobot and Imaging FlowCytobot use a combination of laser-based scattering and fluorescence measurements and video imaging of individual particles to enumerate and characterize cells ranging from picocyanobacteria to chaining-forming diatoms. When combined with automated processing and image classification, these observations make it possible to characterize taxonomic composition of plankton communities with unprecedented temporal resolution, ranging from hours to years. Multi-year time series from FlowCytobot and Imaging FlowCytobot are now being used to study bloom dynamics and community structure in US coastal waters. The high temporal resolution observations of single cell properties make it possible not only to characterize taxonomic composition and size structure, but also to quantify taxon-specific growth rates. Emerging results provide a wide range of insights including links between climate factors and interannual variability in seasonal blooms, decadal-scale shifts in community composition, ecologically important roles for taxon-specific parasites, and detection and characterization of harmful algal blooms.
20151021T121000
20151021T131000
54-915
0
SLS – Heidi Sosik (WHOI) – Bloom dynamics to climate change: Multi-scale observations of phytoplankton with autonomous flow cytometry
20151021T160000-7spt55o3dc4vfua59bh4a2hnvs@google.com
20180502T144718Z
MIT Seminar | Microbial Systems and Beyond (Parsons Lab)
Microbial Systems Seminar
https://microbialsystems.wordpress.com
Assaf Vardi
Weizmann Institute of Science
Title coming
http://wwo.weizmann.ac.il/weizsites/vardi/
Seminars take place in the Parsons Laboratory for Environmental Science and Engineering
*****Note unusual time & location for this event in the series:
Time: 11:00-12:00
Location: MIT building 48 room 308
20151022T110000
20151022T120000
MIT building 48-308, 15 Vassar Street, Cambridge, MA 02139
0
Assaf Vardi – Microbial Systems Seminar
19jflmm840agd1ivjdikaag9b4@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Dr. Helen Poynton
Assistant Professor
University of Massachusetts, Boston
Emerging tools and frameworks for
monitoring marine mussels, key
indicators of coastal pollution
Abstract
20151022T120000
20151022T130000
0
Dr. Helen Poynton
mba735734800bulmbrcdtbpe9g@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20151027T150500
20151027T160000
Clark 507
0
Joern Callies, MIT. ‘The Role of Mixed Layer Instabilities in Submesoscale Turbulence’. Clark 507
vm82n0tt1i4ag6ja9dn5eut410@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Fjords form a key link in the climate system by connecting glaciers of the Greenland Ice Sheet to the ocean. They are the gateways for importing oceanic heat to melt ice and for exporting meltwater into the ocean. Submarine melting in fjords has been implicated as a driver of dynamic glacier changes in the past several decades. However, there are no direct measurements of this melting, and little is known about the fjord processes that modulate melt rates and export meltwater. Here, we explore the drivers of fjord circulation and heat transport in Sermilik Fjord, near the terminus of Helheim Glacier. We investigate the competing roles of buoyancy forcing from the glacier and remote forcing from the shelf. Building on estuarine studies of salt fluxes, we assess the fluxes of heat and salt through the fjord and develop a new framework for inferring submarine melt rates from glacial fjord budgets.
20151028T121000
20151028T131000
54-915
0
SLS – Rebecca Jackson (MIT/WHOI) – Ocean-glacier interactions in Greenland: fjord dynamics and heat transport
20151028T160000-7spt55o3dc4vfua59bh4a2hnvs@google.com
20180502T144718Z
MIT Seminar | Microbial Systems and Beyond (Parsons Lab)
Microbial Systems Seminar
https://microbialsystems.wordpress.com
Kat Coyte
University of Oxford
Title coming
https://www.maths.ox.ac.uk/people/katharine.coyte
Seminars take place in the Parsons Laboratory for Environmental Science and Engineering [MIT building 48 room 316] on Wednesdays between 4:00-5:00PM.
20151028T160000
20151028T170000
MIT building 48-316, 15 Vassar Street, Cambridge, MA 02139
0
Kat Coyte – “The ecology of the microbiome: networks, competition, and stability”
7ocknho75j7gsp6urits4iufkk@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
The evolutionary ecology of pond-
breeding amphibians: From local
populations to regional landscapes
Dr. Jonathan Richardson
Assistant Professor
Providence College
Abstract
20151029T120000
20151029T130000
Redfield Auditorium
0
Dr. Jonathan Richardson
20151030T100000-eoscs2ep8hvtpdm2sesnj3d350@google.com
20180502T144718Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20151030T100000
20151030T110000
E25-119
0
COG3 Seminar – Molly McCanta (Tufts)
ia3l3itiv88dpcsbmjid098k84@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20151103T150500
20151103T160000
Clark 201
0
PO postdocs, ‘5 minute introductions.’ Clark 201.
npqli52ji7mdgvlfa620c1bg58@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
During the daytime, under conditions of relatively low winds and high solar insolation, the nearsurface ocean warms. This stratified diurnal warm layer traps momentum from the wind near the surface, generating shear across the layer. Horizontal advection associated with this diurnal warm layer shear is likely responsible for observed nearsurface freshening in the upper meter of the ocean during the SPURSI field campaign.
This shear associated with the diurnal warm layer, a fractional depth of the deeper mixed
layer, horizontally displaces water near the surface during the daytime converting horizontal gradients into vertical ones. At night, convection vertically mixes the horizontally displaced water throughout the deeper mixed layer. This cycle of advection and then vertical mixing is a mechanism for effective submesoscale lateral diffusion on the scale of 110 km. We will discuss a simplified representation of the mechanism, and estimates of effective submesoscale horizontal diffusivity for the mixed layer. The calculated effective diffusivity associated with this mechanism is 1100 m2/s, depending on the advective timescale, and depth and speed of the diurnal warm layer current.
The importance of the daily cycle as a mechanism for smoothing lateral inhomogeneities within the mixed layer will be considered. Additionally, we examine how the advection associated with the diurnal warm layer may locally enhance or suppress the diurnal warming observed at a location. The frequency of occurrence of diurnal warm layers and global perspectives will be discussed.
20151104T121000
20151104T130000
54-915
0
SLS – Alec Bogdanoff (MIT/WHOI)- Submesoscale lateral mixing by diurnal warm layer shear
20151104T160000-7spt55o3dc4vfua59bh4a2hnvs@google.com
20180502T144718Z
MIT Seminar | Microbial Systems and Beyond (Parsons Lab)
Microbial Systems Seminar
https://microbialsystems.wordpress.com
Xinning Zhang Paulot
Princeton University
“Trace metals in the nitrogen cycle."
http://scholar.princeton.edu/xinningz/home
Seminars take place in the Parsons Laboratory for Environmental Science and Engineering [MIT building 48 room 316] on Wednesdays between 4:00-5:00PM.
20151104T160000
20151104T170000
MIT building 48-316, 15 Vassar Street, Cambridge, MA 02139
0
Xinning Zhang Paulot – “The importance of alternative nitrogenases in N2 fixation in the past and present”
j5b88on15farmvqji9nr4g1lds@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Fish responses to environmental chemicals: genotype to phenotype
Dr. Jed Goldstone
Research Specialist
WHOI Biology Department
Abstract
20151105T120000
20151105T130000
Redfield Auditorium
0
Dr. Jed Goldstone
20151106T100000-eoscs2ep8hvtpdm2sesnj3d350@google.com
20180502T144718Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20151106T100000
20151106T110000
E25-119
0
COG3 Seminar – Ben Kocar (MIT)
klvkq3t4adb3j87tla2e1i55to@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20151110T150500
20151110T160000
Clark 507
0
Susan Wijffles, CSIRO. ‘Detecting the footprint of anthropogenic climate forcing in the ocean’. Clark 507.
h7groh3m547b89r8c6t3joqhuo@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20151112T140000
20151112T150000
Clark 201
0
Hedinn Valdimarsson, Marine Research Institute. ‘Oceanography in Icelandic waters’. Clark 201
20151113T100000-eoscs2ep8hvtpdm2sesnj3d350@google.com
20180502T144718Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Mantle pyroxenites: from asthenosphere to lithosphere
20151113T100000
20151113T110000
E25-119
0
COG3 Seminar – Veronique Le Roux (WHOI)
m5o658pdgk6iqnnhfrkdh1s7to@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20151117T150500
20151117T160000
0
Robert Todd, WHOI. ‘Potential vorticity structure in the North Atlantic western boundary current from underwater glider observations’ Clark 507
9g2sb4helvoome98emc9t6fva8@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
I will present a suite of records from a 950 m-depth sediment core from the western North Atlantic, a site influenced by Antarctic Intermediate Water (AAIW) in the modern ocean. The data suggest that northern sourced waters dominated the water mass mixture during the LGM, and that AAIW was shallower than ~850m. A d18O decrease early in Heinrich Stadial 1 (HS1) is attributed to the incorporation of deglacial meltwater into the northern sourced waters that continued to influence the site. Two interpretations for the mid-to-late HS1 data will be discussed, having opposite implications for the vigor of the Atlantic Meridional Overturning Circulation (AMOC) during this interval. After HS1, the data conform to the consensus view of AMOC variability – increased AAIW presence during the Bolling-Allerod and the Holocene, when the AMOC was strong, and reduced AAIW presence during the Younger Dryas when the AMOC was weak.
20151118T120000
20151118T130000
54-915
0
SLS – Delia Oppo (WHOI) – Deglacial Atlantic circulation:evidence from multiproxy records from shallow western north Atlantic sediment cores
20151120T100000-eoscs2ep8hvtpdm2sesnj3d350@google.com
20180502T144718Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Shallow Landslide Hazards in a Changing Climate.
(note the change in COG3 seminar time and location this week)
20151119T100000
20151119T110000
54-915
0
COG3 Seminar – Dino Bellugi (MIT)
ru39o5vlt6rgs0me84l36b37m0@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Evolution and development of stinging nettle jellyfish
Dr. Rebecca Helm
Postdoctoral Researcher, Tarrant Lab
WHOI Biology Department
Abstract
20151119T120000
20151119T130000
Redfield Auditorium
0
Dr. Rebecca Helm
hrpjs445bd351fal8s4ns2n4vs@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20151119T140000
20151119T150000
Clark 201
0
Gaetan Lerisson, Ecole Polytechnique. ‘Effect of mean current on the stability of internal gravity waves’. Clark 201
8jlf3c11org5b01aqc8irt4u5g@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Diapycnal turbulent mixing in the Southern Ocean is believed to play a role in setting the rate of the ocean Meridional Overturning Circulation (MOC), an important element of the global climate system. Whether this role is important, however, depends on the strength of this mixing, which remains poorly qualified on global scale. To address this question, a passive tracer was released upstream of the Drake Passage in 2009 as a part of the Diapycnal and Isopycnal Mixing Experiment in the Southern Ocean (DIMES). While the mixing rates inferred from vertical dispersion of the tracer are large and imply a key role played by mixing in setting the MOC, those based on localized microstructure measurements seem to suggest otherwise. In this work we use a high resolution numerical model of the Drake Passage region, sampled in the DIMES experiment and tuned to its observations, to explain that the difference between the two estimates arise from the large values of mixing encountered by the tracer when it flows close to the bottom topography. We conclude that enhanced bottom mixing, in combination with large lateral stirring and mixing by mesoscale eddies, is sufficiently strong to play an important role in setting the Southern Ocean branch of the MOC below 2 km.
20151125T120000
20151125T130000
54-915
0
SLS – Ali Mashayek (MIT) – Topographic Enhancement of Vertical Mixing in the Southern Ocean
e6rv273dmrbnm36gt5jtusdf8o@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Using a dynamically consistent state estimate, the vertical redistribution of oceanic heat is investigated over a 20-year period (1992-2011). The 20-year mean vertical heat flux shows strong variations both horizontally and vertically, consistent with the ocean being a dynamically active and spatially complex heat exchanger. Between mixing and advection, the two processes determining the vertical heat transport in the deep ocean, advection plays a more important role in setting the spatial patterns of vertical heat exchange. The global integral of vertical heat flux shows an upward heat transport in the deep ocean, suggesting an abyssal cooling trend over 1992-2011.
The bidecadal change of the ocean vertical heat flux is also examined and provides dynamical insights into the global ocean heat content change. Preliminary results show that above 1500 m more heat is transported downward during 2002 2011 than 1992-2001. The spatial pattern of the vertical heat flux change shows consistent features with previous studies, such as more downward heat transport in the tropical Pacific and the North Atlantic during the last decade. Whereas the spatial pattern of vertical heat flux change is closely related to the advection change, its global integral is largely determined by the change in mixing, indicating a crucial role of ocean mixing in explaining the long-term change of ocean vertical heat exchange.
20151202T120000
20151202T130000
54-915
0
SLS – Xinfeng Liang (MIT) – Global Ocean Vertical Heat Flux and Its Bidecadal
c7pliilcasbpm17nlvp8am53q8@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Dr. T. Aran Mooney
Associate Scientist
WHOI Biology Department
Sounds to warm you on a cold winter’s day:
Using coastal soundscapes to quantify coral reef
communities and anthropogenic activities
Abstract
***SPECIAL ACOUSTICS SEMINAR***
Sponsored by NMFS/NEFSC, CINAR, and the
WHOI AOP&E and Biology Departments
20151202T121500
20151202T131500
NEFSC Stephen H. Clark Conference Room, NOAA Aquarium Building
0
Dr. T. Aran Mooney
nls4iuq7l8nmmgr1hjuf3oabi0@google.com
20180502T144718Z
MIT Seminar | Microbial Systems and Beyond (Parsons Lab)
Microbial Systems Seminar
https://microbialsystems.wordpress.com
Sean Gibbons
MIT
“Protein expression levels constrain evolutionary trajectories during genome streamlining”
http://almlab.mit.edu/sean_gibbons.html
Seminars take place in the Parsons Laboratory for Environmental Science and Engineering [MIT building 48 room 316] on Wednesdays between 4:00-5:00PM.
20151202T160000
20151202T170000
MIT building 48-316, 15 Vassar Street, Cambridge, MA 02139
0
Sean Gibbons – “Protein expression levels constrain evolutionary trajectories during genome streamlining”
jujo1pden2a0fc03a4lf43e1f4@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20151203T140000
20151203T150000
Clark 201
0
Jesse Cusack, National Oceanography Center Southampton. ‘Isopycnal spice variance in the deep ACC’. Clark 201.
20151204T100000-eoscs2ep8hvtpdm2sesnj3d350@google.com
20180502T144718Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Accelerated Late Cretaceous exhumation in the White Mountains, NH: circum-Atlantic tectonism or climate change?
20151204T100000
20151204T110000
E25-119
0
COG3 Seminar – Will Amidon (Middlebury)
vavb7716jhdup6bbspjogo9668@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20151208T150500
20151208T160000
Clark 507
0
Viviane Menezes, WHOI. ‘The circulation of the Indian Ocean: Unusual effect of salinity’. Clark 507.
depq9vqumhk21urf23fh7g7qbc@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
There is considerable interest in determining how the full distribution of surface temperature changes with warming. Model ensembles project that extratropical land temperature variability will decrease in the future, consistent with simple physical arguments related to polar amplification. However, observational studies have thus far come to conflicting conclusions. Several analytical pitfalls in interpreting observational records lead to these discrepancies, and highlight the importance of accounting for non-normality and the effects of filtering, time-averaging, gridding, and smoothing. I will present a set of methods designed to overcome these challenges, which I apply to a large set of daily temperature observations to show that a decrease in temperature variability is already robustly detectable in the extratropics.
20151209T121000
20151209T131000
54-915
0
SLS- – Andy Rhines (UofWashington) – Observations and Dynamics of Decreasing Variability of Winter Temperatures
20151209T160000-7spt55o3dc4vfua59bh4a2hnvs@google.com
20180502T144718Z
MIT Seminar | Microbial Systems and Beyond (Parsons Lab)
Microbial Systems Seminar
https://microbialsystems.wordpress.com
Nichola Hill
MIT
“Evidence of seasonality in a host-pathogen system: Influenza across the annual cycle of wild birds”
http://runstadlerlab.mit.edu/people/nichola-hill
Seminars take place in the Parsons Laboratory for Environmental Science and Engineering [MIT building 48 room 316] on Wednesdays between 4:00-5:00PM.
20151209T160000
20151209T170000
MIT building 48-316, 15 Vassar Street, Cambridge, MA 02139
0
Nichola Hill – “Evidence of seasonality in a host-pathogen system: Influenza across the annual cycle of wild birds”
msglabmg6h3ukkeh4ehcalhkgk@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
The effect of elevated carbon dioxide on the
shells, swimming, and sinking of a shelled
pteropod from the Gulf of Maine
Mr. Alexander Bergan
Ph.D. Candidate
MIT-WHOI Joint Program in
Biological Oceanography
Abstract
20151210T120000
20151210T130000
Redfield Auditorium
0
Mr. Alex Bergan
f5lefkd12pr2nsoo70jpmp46ks@google.com
20180502T144718Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
The Southern Ocean is one of the most energetic regions of the world ocean due to intense winds and storm forcing, strong currents in the form of the Antarctic Circumpolar Current (ACC) interacting with steep topography, and enhanced mesoscale activity. Consequently, the Southern Ocean is believed to be a hotspot for enhanced oceanic mixing. Previous work based on finestructure parameterizations has suggested that strong mixing is also ubiquitous below the mixed layer.
Results from a US/UK field program, however, showed that enhanced internal wave finestructure and turbulence levels are not widespread, but limited to frontal zones where strong bottom currents collide with steep largeamplitude
topography. Direct measurements of turbulence showed that previous estimates of mixing rates in the upper 1km are biased high by up to two orders of magnitude. Despite the prevalence of energetic wind events, turbulence driven by downward propagating nearinertial wave shear is weak below the mixed layer. Inefficient wind forcing at nearinertial frequencies and seasonally varying upper ocean stratification likely contribute to the observed weak mixing rates. Double diffusive processes and turbulence both contribute to buoyancy flux, elevating the effective mixing efficiency above the canonical value of 0.2 in the upper 1km. Ultimately, this work informs largescale modeling efforts through parameterizations of mixing processes in the highly undersampled Southern Ocean.
20151216T121000
20151216T131000
54-915
0
Sophia Merrifield (MIT/WHOI) – Mechanisms for enhanced turbulence in the Drake Passage region of the Southern Ocean
20151216T160000-7spt55o3dc4vfua59bh4a2hnvs@google.com
20180502T144718Z
MIT Seminar | Microbial Systems and Beyond (Parsons Lab)
Microbial Systems Seminar
https://microbialsystems.wordpress.com
Mark Smith
OpenBiome
“Microbiome Engineering: from current practice to future therapy”
http://www.openbiome.org/
Seminars take place in the Parsons Laboratory for Environmental Science and Engineering [MIT building 48 room 316] on Wednesdays between 4:00-5:00PM.
20151216T160000
20151216T170000
MIT building 48-316, 15 Vassar Street, Cambridge, MA 02139
0
Mark Smith – “Microbiome Engineering: from current practice to future therapy”
jkvphj4f0rrhnamens1g11fe2k@google.com
20180502T144718Z
WHOI Seminar | Biological Oceanography
Ecological interactions and adaptations to
seasonality: the Arctic as a laboratory
Dr. Øystein Varpe, Associate Professor
The University Centre in Svalbard, Longyearbyen, Norway
Adjunct Senior Scientist, Akvaplan-niva, Fram Centre, Tromsø, Norway
Abstract
20160114T120000
20160114T130000
Redfield Auditorium
0
Dr. Øystein Varpe
u5uvgtcmulcp7lehapbrqe3h6c@google.com
20180502T144718Z
WHOI Seminar | Physical Oceanography
20160119T150500
20160119T160000
Clark 507
0
Jim Bisagni, U Mass Dartmouth. ‘Salinity variability along the eastern continental shelf of the Unites States and Canada, 1973-2013’. Clark 507.
qsd42fm5fdv44u8bhftg3p48es@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Hydrothermal plumes and deep-sea
pelagic biology: insights, challenges,
and a new bioluminescence-based
method for observing zooplankton
distribution
Mr. Brennan Phillips
Ph.D. Candidate, Univ. of Rhode Island
Graduate School of Oceanography
Abstract
20160121T120000
20160121T130000
0
Mr. Brennan Phillips
6ak8j8naldca65bnmt2ehch300@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160126T150500
20160126T160000
Clark 507
0
Maike Sonnewald, MIT. ‘Ocean model utility dependence on horizontal resolution’. Clark 507.
72e5ghv5n9g00bhqf9h4v4i0a0@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Dr. John Stegeman, Senior Scientist,
WHOI Biology Department
Evolution of chemical-biological interactions:
stochasticity and serendipity
Dr. Samuel Laney, Associate Scientist,
WHOI Biology Department
Phytoplankton blooms in high latitude systems
and - incidentally - what happens when you
christen a vessel with water instead of champagne
20160128T153000
20160128T163000
Redfield Auditorium
0
Pint of Science – 20-minute Talks
gag64q6k4rppibofnun8nmvlno@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160202T150500
20160202T160000
Clark 507
0
Tom Haine, Johns Hopkins. ‘Denmark Strait overflow kinematics’. Clark 507.
a2ekjra8t0jbckpkddqqo1uvm4@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Quantitative and mechanistic understanding of the changes in atmospheric CO2 concentrations and ocean carbon content between glacial and interglacial periods remains lacking. An increase in the efficiency of the biological pump has been hypothesized to contribute to higher ocean carbon storage during glacial periods. Here we use a model of the ocean's biogeochemical cycles that includes both carbon (13C) and nitrogen (15N) isotopes but no sediment interactions. We present results from one present day simulation and six simulations of the Last Glacial Maximum (LGM, ~20 ka before the present). The LGM simulations are idealized sensitivity experiments that explore effects of changes in maximum phytoplankton growth rates (mmax). Increasing mmax in the model leads to a more efficient biological pump, more carbon storage, and lower d13CDIC and oxygen concentrations. The resulting increase of denitrification stimulates additional nitrogen fixation and increases the spatial variance of d15NNO3, while decreasing the ocean’s fixed nitrogen inventory. Increased nitrogen fixation lowers surface d15NNO3 in most of the tropics. In the model’s Southern Ocean modest increases in mmax result in higher d15NNO3 due to enhanced local nutrient utilization, consistent with reconstructions, but larger mmax cause declining values there owing to the poleward transport of low tropical d15NNO3. Comparison to reconstructions from LGM sediments indicates that models with moderately increased mmax (by 16 - 33 %) fit both isotope data best, whereas large increases are inconsistent with nitrogen isotopes although they still fit the carbon isotopes reasonably well. The best fitting models reproduce major features of the glacial d13CDIC, d15N, and oxygen reconstructions, while simulating reduced carbon storage, compared with the pre-industrial ocean, due to lower preformed carbon concentrations. We conclude that the biological pump was more efficient during the LGM. However, sediment interactions and whole ocean alkalinity changes may be required to increase ocean carbon storage. Our analysis illustrates interactions between the carbon and nitrogen cycles as well as the complementary constraints provided by their isotopes.
20160203T120000
20160203T130000
54-915
0
SLS – Andreas Schmittner (Oregon State University) – Complementary Constraints from Carbon (13C) and Nitrogen (15N) Isotopes on the Efficiency of the Glacial Ocean’s Biological Pump
48ns06qmk86uukgfrei1om9fb4@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
The influence of sea ice and hydrography on phytoplankton blooms in the rapidly changing Chukchi Sea (Arctic Ocean)
Ms. Kate E. Lowry
Ph.D. Candidate, Stanford University
Abstract
20160204T120000
20160204T130000
0
Ms. Kate E. Lowry
2h34vavglqdue109palq439p3k@google.com
20180502T144719Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Investigating past climate-biosphere links: Speleothem-based climate reconstructions to constrain controls on Late Holocene forest expansion in South America
20160205T100000
20160205T110000
E25-119
0
COG3 Seminar – Corinne Wong (BC)
5fnr4l7t9jcg1cq0nvcksbs8qg@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160209T150500
20160209T160000
Clark 507
0
Anthony Kirincich, WHOI. ‘The importance of lateral variability on exchange across the inner shelf’. Clark 507
uksifljdddbbdn74o6ph44l3pk@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
The accuracy of ocean components of climate models is thought to increase with resolution, and we examine this associated change in utility on a range of model fields. A 30-year integration (1978 to 2007) of the NEMO model at 1o, 1/4o and 1/12o is used to investigate the impact of modelling choices associated with horizontal resolution. Changes in degrees of freedom associated with the increasing resolution allow alternative energy dissipation pathways and their impact is assessed.
A distinct strengthening of the anti-clockwise component of the overturning is found in the Southern Ocean, primarily owing to the baroclinic component. The mixed layer does not change significantly with resolution, with results comparable to observations. Minor changes with resolution are attributed to increased numbers of fronts with better resolution. In the interior, steric height variability, specifically its covariance between the surface (2000m) does change owing to eddy effects not captured by the Gent-McWilliams parametrization. Topographic interactions are assessed in terms of vortex stretching in the bottom pressure torque term. Major changes are found in the baroclinic component in the Southern Ocean. Low resolution appears appropriate for fields such as the mixed layer depth, but higher resolution is increasingly required for large scale features through allowing eddy activity.
20160210T120000
20160210T130000
54-915
0
SLS- Maike Sonnewald (MIT) – Ocean model utility dependence on horizontal resolution
40aal7a8ke2ji4r7vm5pot8j54@google.com
20180502T144719Z
MIT Seminar | Microbial Systems and Beyond (Parsons Lab)
Microbial Systems Seminar
https://microbialsystems.wordpress.com
Ewen Cameron
"Synthetic biology tools to study microbial systems and engineer probiotic bacteria”
Seminars take place in the Parsons Laboratory for Environmental Science and Engineering [MIT building 48 room 316] on Wednesdays between 4:00-5:00PM.
20160210T160000
20160210T170000
MIT building 48-316, 15 Vassar Street, Cambridge, MA 02139
0
Ewen Cameron – “Synthetic biology tools to study microbial systems and engineer probiotic bacteria”
p8hlu2i1n7oa7e9d4k529jikvk@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Darcy Taniguchi, Ph.D.
Postdoctoral Researcher
MIT
The influence of predator:prey ratios on planktonic
community diversity in a size-structured model
of phyto- and microzooplankton
Abstract
20160211T120000
20160211T130000
Redfield Auditorium
0
Darcy Taniguchi
14m4uvkacp2gos6n7mfqp63tv0@google.com
20180502T144719Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Using Thallium Isotopes to Track Sediment Transport from Slab to Surface in the Aleutian Arc
20160212T100000
20160212T110000
E25 @ 119
0
COG3 Seminar – Sune Nielsen (WHOI)
tnsjcpeh5qpej4g2icjak6f0u8@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160216T150500
20160216T160000
Clark 507
0
‘Meet the PO students’. Clark 507.
8fmq0u02dfbgsq7o8fasosd454@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
We investigate how sea surface temperatures (SSTs) around Antarctica respond to the Southern Annular Mode (SAM) on multiple timescales. To that end we examine the relationship between SAM and SST within unforced preindustrial control simulations of coupled general circulation models (GCMs) included in the Climate Modeling Intercomparison Project phase 5 (CMIP5). We develop a technique to extract the response of the Southern Ocean SST to a hypothetical step increase in the SAM index. We demonstrate that in many GCMs, the expected SST step response function is nonmonotonic in time. Following a shift to a positive SAM anomaly, an initial cooling regime can transition into surface warming around Antarctica. However, there are large differences across the CMIP5 ensemble. In some models the step response function never changes sign and cooling persists, while in other GCMs the SST anomaly crosses over from negative to positive values only three years after a step increase in the SAM. This intermodel diversity can be related to differences in the models' climatological thermal ocean stratification in the region of seasonal sea ice around Antarctica. Exploiting this relationship, we use observational data for the time-mean meridional and vertical temperature gradients to constrain the real Southern Ocean response to SAM on fast and slow timescales.
20160217T120000
20160217T130000
54-915
0
SLS- Yavor Kostov (MIT) – Fast and slow responses of Southern Ocean SST to SAM in coupled climate models
aobp2r0b268m51n9iso0sdo5vc@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Population genomics of the rapidly invading lionfish, Pterois volitans
Ms. Eleanor K. Bors
Ph.D. Candidate, Biological Oceanography
WHOI Biology Department
Abstract
20160218T120000
20160218T130000
Redfield Auditorium
0
Ms. Eleanor K. Bors
pd83a411shko775gr35jaqg9fc@google.com
20180502T144719Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
The underground economy (bioenergetics of subseafloor sedimentary life)
20160219T100000
20160219T110000
E25-119
0
COG3 Seminar – Steve D’Hondt (URI)
9m1u51acc0ha532q6dquijc7ds@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160223T150500
20160223T160000
0
Canceled
d0slspp5961tntgtd19c85mbos@google.com
20180502T144719Z
MIT Seminar | Microbial Systems and Beyond (Parsons Lab)
Microbial Systems Seminar
https://microbialsystems.wordpress.com
Stefan Thiele
“LOHAFEX – Lessons from the last iron fertilization experiment”
Seminars take place in the Parsons Laboratory for Environmental Science and Engineering [MIT building 48 room 316] on Wednesdays between 4:00-5:00PM
20160224T160000
20160224T170000
MIT building 48-316, 15 Vassar Street, Cambridge, MA 02139
0
Stefan Thiele – “LOHAFEX – Lessons from the last iron fertilization experiment”
8t1ep6q888abq17kie34nomf4g@google.com
20180502T144719Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
How did plate tectonics begin?
20160226T100000
20160226T110000
54 @ 915
0
COG3 Seminar – Michael Brown (University of Maryland)
4ae98dvnh95t652m37nklmqlfc@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160301T150500
20160301T160000
0
Debasis Sengupta, Indian Inst. Sci. ‘Monsoon rain, river runoff, and Bay of Bengal salinity’. Clark 507
rpqjccranqb6v7lfuffo3h6rm4@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
20160302T120000
20160302T130000
54-915
0
SLS-Lorenzo Polvani (Columbia)- zone extremes in the Arctic, and their impact on surface climate
vapf7nju7qg6vd4b0bedvhi634@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Coral reef soundscapes: spatiotemporal variability is linked to reef biota
Mr. Max Kaplan
Ph.D. Candidate, Biology Department
WHOI
Abstract
20160303T120000
20160303T130000
Redfield Auditorium
0
Mr. Max Kaplan
s4j6kjemhi47ev09qa7prtjtm0@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160307T110000
20160307T120000
Clark 507
0
Shota Katsura, U Tokyo. ‘Structure and variation of upper ocean salinity in the subtropical Pacific: North Pacific tropical water and barrier layer.’ Clark 507.
22hu9k0u8jjgnrpu4lg2gkdiag@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160308T150500
20160308T160000
Clark 507
0
Joseph D’Addezio, U. South Carolina. ‘Air-sea interactions in the Seychelles-Chagos thermocline ridge’. Clark 507.
u24hh7d4d0vvru16l1rum83b1k@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
We describe and interpret in situ observations of tidally driven turbulence that were obtained in the vicinity of a small channel that transects the crest of the Mendocino Ridge in the north-eastern Pacific. Flows are funneled through the channel and have tidal excursion lengths comparable to the width of the ridge crest. Once per day, energetic turbulence is observed in the channel, with overturns spanning almost half of the full water depth. A high resolution, nonhydrostatic, 2.5-dimensional simulation is used to interpret the observations in terms of the advection of a breaking tidal lee wave past the site location, and subsequent development of a hydraulic jump. During this phase of the tide the strong transports were associated with full depth flows, however, during the weaker beat of the tide transports were shallow and surface-confined, generating negligible turbulence. A regional numerical model of the area finds that the subinertial K1 (diurnal) tidal constituent generates topographically trapped waves which propagate anticyclonically around the ridge, and are associated with enhanced near-topographic K1 transports. The interaction of the trapped waves with the M2 (semidiurnal) surface tide produces a baroclinic tidal flow that is alternately surface confined and full depth. Consistent with observations, full depth flows are associated with the generation of a large amplitude tidal lee wave on the northward face of the ridge, while surface confined flows are largely nonturbulent. The regional model demonstrates that nearfield dissipation over the entire ridge is diurnally modulated, despite the larger amplitude of the M2 tidal constituent, indicating that the trapped wave modulates near-field dissipation and mixing at this location.
20160309T120000
20160309T130000
54-915
0
SLS- Ruth Musgrave (MIT-MechE) – Tidally driven mixing: breaking lee waves, hydraulic jumps and the influence of subinertial trapped internal tides
grkcdmfue1ei5h3h7q2akro72k@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Ocean Sciences Redux: Talks by WHOI Biology Department Scientists at the 2016 Ocean Sciences Meeting
Heidi Sosik
"High Resolution Time Series of Plankton Communities: From Early Warning of Harmful Blooms to Sentinels of Climate Change”
Simon Thorrold
"Tracing Carbon Flow Through Food Webs on Isolated Coral Reefs in the Central Pacific Ocean Using a Compound-Specific Stable Isotope Approach"
Scott Gallager
"OceanCubes: Integrated Long-Term, High Frequency Biological, Chemical, and Physical Measurements for Understanding Mesoplankton Biodiversity and Community Structure in Coastal Ecosystems"
20160310T120000
20160310T130000
0
Ocean Sciences Redux
sc66pgbv5304ni6omomviem07g@google.com
20180502T144719Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
The chase for 247Cm and what it reveals about the stellar environment of r-process nucleosynthesis
20160311T100000
20160311T110000
E25 @ 119
0
COG3 Seminar – Francois Tissot (MIT)
r7o3ktjdrjovecuut3l7vomdk0@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160315T150500
20160315T160000
Carriage House
0
‘What are we up to? Talks by three PO faculty’. Carriage House
0ut5p5eqm7gvf41qhg299rrvf4@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Eddies in the ocean move westwards. Those shed by western boundary currents must then interact with shelf-slope topography at the western boundary.
This simple picture is complicated by the presence of other eddies and mean flows, but satellite observations show that many western boundary continental shelves are affected by mesoscale eddies translating near the shelfbreak. In this SST image, a Gulf Stream Warm Core Ring (anticyclone) transports cold fresh shelf water offshore across the Mid-Atlantic Bight shelfbreak. Using idealized numerical simulations, I address three questions:
1. Does the eddy always get to the shelfbreak, or can sloping topography stop an eddy from crossing it?
2. What is the magnitude of offshore transport driven by these eddies?
3. What is the effect of the eddy on the shelf's flow field?
20160316T120000
20160316T130000
54-915
0
SLS- Deepak Cherian (MIT/WHOI) – Eddy vs. shelf-slope topography
0aqhq605teroukthkem16k83bc@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Phytoplankton Modeling in the Western Gulf of Mexico: Taking Advantage of an Imaging FlowCytobot
Dr. Darren W. Henrichs, Assistant
Research Scentist, Campbell Lab,
Department of Oceanography,
Texas A&M University
Abstract
20160317T120000
20160317T130000
Redfield Auditorium
0
Dr. Darren W. Henrichs
0tv6c94i72uf7g41rhopctvujk@google.com
20180502T144719Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
The Geobiological Significance of Archaeal Tetraether Lipids: a preliminary investigation with analytical and biological constraints
20160318T100000
20160318T110000
E25 @ 119
0
COG3 Seminar – Xiaolei Liu (MIT)
poi0rvbl4kq6oo9cemk8l7is7c@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160322T150500
20160322T160000
Clark 507
0
Steve Lentz, WHOI. ‘The Middle Atlantic Bight cold pool revisited.’ Clark 507.
ofoqokjn4nk54q8ac5rmgrqbn4@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
20160323T120000
20160323T130000
0
no SLS – Spring break
5mj78tsgqgj4b5kmk3g4nhdhes@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
A Call to Action in Data Science and Analytics Research and Education
Dr. Peter Fox - CANCELLED
Professor of Earth and Environmental Science,
Computer Science and Cognitive Science,
Rensselaer Polytechnic Institute
20160324T120000
20160324T130000
Redfield Auditorium
0
Dr. Peter Fox
dcidnoocei3lhj90lagl45btgc@google.com
20180502T144719Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20160325T100000
20160325T110000
0
No COG3 Seminar, Spring vacation
vuc1onajs0fpct9nl84jltm95g@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Despite the major role played by mesoscale eddies in redistributing the energy of the large-scale circulation, our understanding of their dissipation is still incomplete. This study investigates the generation of internal waves by decaying eddies in the North Atlantic western boundary. The eddy presence and decay are measured from the altimetric surface relative vorticity associated with an array of full-depth current meters extending ~100 km offshore at 26.5N. In addition, internal waves are analysed over a topographic rise from 2-year high-frequency measurements of an Acoustic Doppler Current Profiler (ADCP), which is located 13 km offshore in 600 m deep water. Despite an apparent polarity independence of the eddy decay observed from altimetric data, the flow in the deepest 100 m is enhanced for anticyclones (25.2 cm/s) compared with cyclones (-4.7 cm/s). Accordingly, the internal wave field is sensitive to this polarity-dependent deep velocity. This is apparent from the eddy-modulated enhanced dissipation rate, which is obtained from a finescale parameterization and exceeds 10^-9 W/kg for near-bottom flows greater than 8 cm/s. The present study underlines the importance of oceanic western boundaries for removing the energy of low-mode westward-propagating eddies to higher-mode internal waves.
20160330T120000
20160330T130000
54-915
0
SLS-LOUIS CLEMENT (LDEO) – Generation of internal waves by eddies impinging on the western boundary of the North Atlantic
2b0bcld95dv70frkma0p6spqi4@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Engineering fish genomes to understand environmental interactions
Dr. Matthew Salanga
Postdoctoral Investigator
WHOI Biologoy Department
Abstract
20160331T120000
20160331T130000
Redfield Auditorium
0
Dr. Matthew Salanga
7ob465cn2h83e00ngtea7pn4r8@google.com
20180502T144719Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Variability in stable potassium isotopes in geological and biological systems
20160401T100000
20160401T110000
E25 @ 119
0
COG3 Seminar – Leah Morgan (USGS Denver)
523p1g4f1vs8mkp1i8dv84q2n8@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160405T150500
20160405T160000
Clark 507
0
Anna FitzMaurice, Princeton U. ‘The Southern Ocean overturning circulation and its relation to Antarctic sea ice extent’. Clark 507.
7f8gqhpvh8tmioqalvkb0i486k@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
The ocean is populated by an intense geostrophic eddy field that is unresolved in most numerical ocean models used for climate prediction. A geometric framework for parameterising ocean eddy fluxes will be presented that is consistent with conservation of energy and momentum. The framework involves rewriting the residual-mean eddy force as the divergence of an eddy stress tensor. The magnitude of the eddy stress tensor is bounded by the eddy energy, allowing its components to be rewritten in terms of the eddy energy and non-dimensional parameters describing the mean "shape" of the eddies, analogous to “eddy ellipses” used in observational oceanography. These non-dimensional geometric parameters have strong connections with classical stability theory, for example, the new framework preserves the functional form of the linear Eady growth rate and, with one additional ingredient, Arnold’s first stability theorem. This framework also leads to a simple model of "eddy saturation”: the relative insensitivity of the ocean circulation and stratification to the magnitude of the surface wind stress in ocean models with explicit eddies. These results offer the prospect of improved eddy parameterisations that both preserve the underlying symmetries and conservation laws inherent in the unfiltered equations, and reproduce empirical results that have been obtained with eddy-permitting models.
20160406T120000
20160406T130000
54-915
0
SLS-David Marshall (Oxford) – A geometric interpretation of eddy-mean flow interaction in the ocean
vg80snltv08i757p9eq6its0is@google.com
20180502T144719Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Supervolcanoes and their deposits: insights into the dynamics of large magma reservoirs
20160407T100000
20160407T110000
54-915
0
COG3 Seminar – Olivier Bachmann (ETH Zurich)
in3apbt93cqa2q7t3sud9q8pn0@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Dr. David Gold
Augouron Geobiology Fellow,
Department of Earth, Atmospheric &
Planetary Sciences, MIT
Abstract
20160407T120000
20160407T130000
Redfield Auditorium
0
Dr. David Gold
lfgcefe5ln0kol3j3am3qd8l3k@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160412T150500
20160412T160000
Clark 507
0
Ken Brink, WHOI. ‘Cooling, winds and eddies over the continental shelf’. Clark 507.
n46c0b7qi2hn84luvfnn1m0ho0@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
The ocean is a major sink of anthropogenic CO2 emissions. In order to predict future atmospheric CO2 levels and global climate, we must improve quantification of the ocean carbon pumps, which sequester CO2 from the atmosphere on timescales from years to millennia. In this talk, I will present field data from a quasi-Lagrangian cruise in Monterey Bay, CA and use it to demonstrate how in situ measurements of dissolved gases can be used to quantify the biological and solubility pumps. In particular, O2 concentration and isotopic composition are tracers of gross and net productivity. A persistent challenge in quantifying biological productivity from O2 measurements is the need to accurately parameterize the physical processes that also alter O2 concentration and isotopic composition (e.g., bubble-mediated gas exchange, diffusive gas exchange, and mixing). Measurements of multiple inert gases, such as the noble gases, are used to develop parameterizations for these physical processes. These parameterizations are then applied to bioactive gases such as O2 and CO2, thereby improving estimates of the ocean carbon pumps. Additionally, I will compare in situ gas tracer methods for quantifying productivity with simultaneous incubation- and sediment trap-based productivity estimates.
20160413T120000
20160413T130000
54-915
0
SLS – Cara Manning (MIT-WHOI) – What can oxygen and noble gases teach us about the ocean carbon pumps?
9lubbf5k4jk5iu15vn9rqbuo7s@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Saxitoxin gene structure and representation
in nontoxic and toxic dinoflagellate species
Ms. Kathleen J. Ptiz
Ph.D. Candidate, Biological Oceanography,
WHOI Biology Department
Abstract
20160414T120000
20160414T130000
Redfield Auditorium
0
Ms. Kathleen J. Pitz
rlvogkvcd5qun4u56asglevkts@google.com
20180502T144719Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Landscape evolution of the Channeled Scablands, eastern Washington
20160415T100000
20160415T110000
E25 @ 119
0
COG3 Seminar – Isaac Larsen (UMass)
q9ls49jii8h2tm8pej80hlu6rk@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160419T150500
20160419T160000
Clark 201
0
Mike Spall, WHOI. ‘Offshore decay scale of cold upwelled SST’. Clark 201
cvfe069npr1tlfqd734tmkb0o8@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
The talk will address the implications of a warming Arctic Ocean to the structure and ventilation of the Arctic halocline, and to the overlying sea-ice cover. In recent years, atypically warm intrusions have been observed in the halocline. These derive from intense summertime solar warming on outcropping isopycnals in expansive ice-free regions. Heat that is stored in the shallow halocline can be released in the fall and winter by shear driven mixing, and convective mixing by the release of dense plumes during sea-ice growth. On the other hand, deeper warm ocean layers remain unaffected. I'll show that under continued warming, there exists the possibility for a regime shift in halocline ventilation by these warm waters, and a subsequent cap on the storage of deep-ocean heat.
20160420T120000
20160420T130000
54-915
0
SLS – Mary-Louise Timmermans (Yale) – Summer heat overwinters in the Arctic Ocean
49ap35uofh5q6e728413ejcfb4@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Meet the Joint Program Biology Graduate Students
Six students will give short presentations on their research
Camrin Braun, Megan May, Jennifer Panlilio, Hanny Rivera, Laura Weber, Casey Zakroff
Abstract
20160421T120000
20160421T130000
Redfield Auditorium
0
Meet the Joint Program Biology Graduate Students
ptd2h63hnhj0ql1hbcn99957ek@google.com
20180502T144719Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Climate and Tectonics of the southern Central Andes, NW Argentina
20160422T100000
20160422T110000
E25 @ 119
0
COG3 Seminar – Alexander Rohrmann (Oregon State University)
549mtpoqbotab2bts869uq6fog@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160425T140500
20160425T150000
Clark 201
0
Matthew Alford, SIO. ‘Observing the generation, propagation and dissipation of internal waves in the ocean.’ Clark 201.
ai1ec-817316@oceans.mit.edu
20180502T144719Z
MIT Sea Grant College Program Brown Bag Seminar
Tuesday April, 26th
E38-3rd Floor Conference Room
12:00 – 1:00pm
For the past two decades, efforts to stem the tide of new marine invasions focused on ballast water exchange and treatment. Nonetheless, established invasive species populations are expanding their ranges and the rate of introduction is likely to increase. The role of hull fouling in spreading marine species has been underestimated, but climate-related impacts, such as increased sea temperatures, ocean acidification, changes in salinity and habitat alterations also contribute to expanding ranges and new introductions. This talk reviews changes observed in local populations and challenges the engineering community to develop innovative approaches to antifouling coatings.
We encourage attendees to bring their lunch to the seminar. The seminar is open to the public. Please pass this announcement along to interested parties. Questions can be sent to KBaltes@mit.edu.
20160426T120000
20160426T130000
+42.363585;-71.082461
E38-3rd Floor Conference Room @ Cambridge, MA 02142, USA
0
April 26th Brown Bag Seminar: Invasive Marine Species: The Guests that Stay Forever by Dr. Judy Pederson of MIT Sea Grant
3gs0l1b0k3j83gt5h6gg0gdp2o@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160426T150500
20160426T160000
Carriage House
0
Hyodae Seo, WHOI. ‘Eddy-driven air-sea interaction in the California Current System’. Carriage House.
3c7gkt0bk76i6jrn78o4tjl8qc@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Recent work has shown that turbulence in the ocean due to breaking internal gravity is one of the largest uncertainties in climate models. Knowledge of the horizontal and vertical distribution of the turbulence is crucial, which is challenging because internal waves can travel far from their sources and can break via a variety of mechanisms. In this talk I will first introduce internal waves for non-specialists, then walk through an example in the South China Sea where waves can be tracked from their source to their breaking locations, and a rough energy budget determined. Then I’ll discuss recent progress in tracking internal wave energy from generation to cross-basin propagation to dissipation on the globe, focusing on recent efforts to constrain 1) q, the fraction of locally dissipated energy and 2) the reflection coefficient which determines the partition of energy breaking over continental margins versus in the deep basins. A key thread of these analyses is the constant interplay between observations and high-resolution models.
20160427T120000
20160427T130000
54-915
0
SLS – Matthew Alford (Scripps Institute of Oceanography) – Observing the generation, propagation and dissipation of internal waves in the ocean
8p4bmlj57khnvdpmuadr4q7ga0@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Hidden layers of the genome: The role of epigenetics in organismal responses to environmental change
Dr. Neel Aluru
Assistant Scientist
WHOI Biology Department
Abstract
20160428T120000
20160428T130000
Redfield Auditorium
0
Dr. Neel Aluru
a5dfrcep1oi350iejd3gmjtuks@google.com
20180502T144719Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Strain controls on olivine crystallographic texture: a record from mantle xenoliths, West Marie Byrd Land, Antarctica
20160429T100000
20160429T110000
E25 @ 119
0
COG3 Seminar – Seth Kruckenberg (BC)
o9fe33h9rkfjhve2qpvaqem2bo@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160503T150500
20160503T160000
Clark 507
0
Susan Wijffels, CSIRO. ‘Towards understanding the Indonesian Throughflow and its variability’. Clark 507.
dbe78mrro0f3pr2cs2afptun68@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
20160504T120000
20160504T130000
54-915
0
SLS – Stephanie Dutkiewicz – MIT (EAPS)
rr2s5nbekuebsppjqm5klkvhfc@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Towards an understanding of microbial ecosystem function in the polar ocean
Dr. Jeff Bowman
Postdctoral Fellow
Lamont Doherty Earth Observatory
Abstract
20160505T120000
20160505T130000
Redfield Auditorium
0
Dr. Jeff Bowman
g7md7ulk3eourmg52pjl54te0g@google.com
20180502T144719Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
When did the continents grow?
20160506T100000
20160506T110000
E25 @ 119
0
COG3 Seminar – Stephen Parman (Brown)
a56o2mbh0vmq7j6pieu7oq0qsg@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Rapid adaptation in the sea: transcriptomic insights from a marine invader
Dr. Carolyn Tepolt
Smithsonian Environmental Research Center
Abstract
20160510T120000
20160510T130000
Redfield Auditorium
0
Dr. Carolyn Tepolt
hltebk9pl3i849e9kbv2cq7di0@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160510T150500
20160510T160000
Clark 507
0
Luca Centurioni, SIO. ‘Near-surface circulation of the North West Pacific Ocean and interaction with the China Seas’. Clark 507
086ehfu2ko34c7f70a5qn0m71k@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
20160511T120000
20160511T130000
54-915
0
SLS – Isabela Le Bras (MIT-WHOI)
r44hho7tpn9hvcu27ln9lkm450@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Linking the physiology of host-associated microbiomes to ecological interactions and ecosystem processes
Dr. Roxanne Beinart
NSF Ocean Sciences Postdoctoral Research
Fellow, WHOI Geology and Geophysics Dept.
Abstract
20160512T120000
20160512T130000
Redfield Auditorium
0
Dr. Roxanne Beinart
1l7rbp8gscpdmu2724b07a3g00@google.com
20180502T144719Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Correlative microscopy, geochronology, and atom probe tomography of metamorphosed zircon
20160513T100000
20160513T110000
E25 @ 119
0
COG3 Seminar – Emily Peterman (Bowdoin)
lgt54fubogv1d6gjt18ngh2f4o@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Does size matter for life in the ocean?
20160513T120000
20160513T130000
MIT 54-915
0
SLS – Adrian Martin (NOCS) – Does size matter for life in the ocean?
ufput6ddk748mmovk4t0stb9p8@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Is everything everywhere: Insights into the role of intra-specific diversity in the physiological ecology of phytoplankton
Dr. Harriet Alexander
Postdoctoral Research Scientist
Lamont-Doherty Earth Observatory
Columbia University
Abstract
20160516T120000
20160516T130000
0
Dr. Harriet Alexander
hq3t95rbns58me6c0dcqc97ei8@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160517T150500
20160517T160000
Clark 201
0
Nick Beaird, WHOI. ‘Fingerprints of ocean-glacier interaction around Greenland’. Clark 201.
o2m2o24hbf070rcodte1ntcpv4@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
All You Always (Secretly) Wanted to Know About Marine Fungi But Were Afraid to Ask, Especially About Those from Deep-Sea Habitats
Dr. Gaetan Burgaud
Université de Brest, Laboratoire Universitaire de Biodiversité et Ecologie Microbienne
France
Abstract
20160519T120000
20160519T130000
Redfield Auditorium
0
Dr. Gaetan Burgaud
v0tonlt37us3kd0pv7l1mquob4@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160519T140500
20160519T150000
Clark 201
0
Charlie Eriksen, U. Washington. ‘Deepglider observations of full-depth flow structure from Bermuda to the Western Boundary’. Clark 201.
695coig87s8vpkmd94tqr47cc8@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Anthropogenic climate change drives shift and shuffle in marine phytoplankton communities
Dr. Andrew Barton
Princeton University Geophysical Fluid Dynamics Laboratory
Abstract
20160523T120000
20160523T130000
Redfiled Auditorium
0
Dr. Andrew Barton
3j02b94am2l3qceptmr4qt26n0@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160524T150500
20160524T160000
Clark 201
0
Sarah Purkey, LDEO. ‘Regional and global rates of ocean mass addition between 1996-2006 from a full depth sea level rise budget’. Clark 201.
3dsmv53iq9qrj9rm821u916qvg@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Recent observations show that the Southern Ocean is dominating anthropogenic ocean heat uptake. Southern Ocean heat uptake is large because the strong northward transport of the heat content anomaly limits warming of the sea surface temperature in the uptake region. Using results from eddy-rich global climate simulations, I will discuss the processes controlling the northward heat transport away from the uptake region and the convergence of the heat content anomaly in the midlatitude Southern Ocean. Heat budget analyses reveal that different processes dominate to the north and south of the main convergence region. The heat transport northward from the high-latitude uptake region is driven primarily by passive advection of the heat content anomaly by the existing time mean circulation, with a smaller contribution from enhanced upwelling. The heat anomaly builds up in the midlatitudes due to a convergent Ekman transport anomaly, combined with limited heat transport further northward into the mode waters. To the north of the peak convergence region, eddy processes drive the warming and account for nearly 80% of the northward heat transport anomaly.
20160525T120000
20160525T125000
54-915
0
SLS – Adele Morrison (Princeton) – Mechanisms of Southern Ocean heat uptake and transport
aaig83l8ph0piup82cpfhgudfk@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
We present a new, steady-state macromolecule-based model to study light-nutrient co-limitation of phytoplankton growth. The model is based on simplified metabolic flux network and resolves key pools of macro-molecules, each of which has different roles for cellular growth. The model is used to predict and interpret the variation of cellular stoichiometry of fresh water Synechococcus sp. under different light and nutrient environment over a range of dilution rates (averaged growth rates) in a steady state culture. The model explains the different response of cellular nitrogen and phosphorus quota to the various light-nutrient environments, predicting protein and RNA as most influential molecules on nitrogen and phosphorus quotas respectively. The model indicates that, though total nitrogen storage is larger than phosphorus storage, relative to requirements, many times more phosphorus can be stored. It accurately predicts the maximum possible growth rate based on the limits of resource allocation within the cell. Finally, the model predicts nutrient-light co-limitation of cell population density under different dilution rates. While the nutrient has a direct effect on the population density, light impacts it by modifying the cellular stoichiometry. This steady-state, macromolecule based model provides bases for predicting phytoplankton growth in different dynamic environments
20160526T140000
20160526T150000
0
SLS – Keisuke Inomura (PAOC-MIT) – A macromolecular model of phytoplankton growth under light and nutrient co-limitation
9742fscbf75i0m39vma3775v9k@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160526T140500
20160526T150000
Clark 201
0
Dan Amrhein, MIT/WHOI. ‘Towards ocean state estimation at the Last Glacial Maximum’. Clark 201
ll80brjfgrjt197v2jusootht4@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
20160527T120000
20160527T130000
54-915
0
Special SLS – Joe LaCasce (U of Oslo) – The buoyancy-driven ocean circulation in idealized and realistic basins
311aue6cmfctjj86m9soa7grfk@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160531T150500
20160531T160000
Clark 507
0
Ke Chen, WHOI. ‘Heat balance and temperature variability in the Northeast US coastal ocean’. Clark 507.
37pufqcsb1t2cohqvog41humpc@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Internal hydraulic jumps in flows with upstream shear are investigated, motivated by applications such as the flow over sills in Knight Inlet and Hood Canal. The role of upstream shear has not previously been thoroughly investigated, although it is important in many natural flows, including exchange flows and flows over topography. Several two-layer theories are extended to include upstream shear, showing that solutions only exist for a limited range of upstream shear values. More realistic two-dimensional numerical simulations are guided by the two-layer theory predictions, and the results are used to evaluate the theories. The simulations also show the qualitative types of hydraulic transitions that occur, including undular bores, fully turbulent jumps, and conjugate state-like solutions. Numerical simulations are also used to investigate the mixing, and a few 3D numerical simulations are found to be consistent with the 2D results.
When the upstream shear is increased and the basic two-layer theories no longer exhibit solutions, entrainment is required. Furthermore, the downstream structure of the flow has an important effect on the jump properties. These factors are investigated by modifying a two-layer theory to allow entrainment and account for the downstream vertical velocity structure. The resulting theory indicates that entrainment and jump structure become important factors that influence the jump height. However, the results are very sensitive to how the downstream vertical profiles of velocity and density are incorporated into the layered model, highlighting the limitations of the two-layer approximation when the shear is large.
While these two layer theories provide insight into the types of jumps that can occur and the mixing that they cause, jumps such as those that occur in Knight Inlet are significantly influenced by factors such as topography, tidal forcing, and three-dimensional effects.
20160601T121000
20160601T131000
54-915
0
Kelly Anne Ogden (MIT-WHOI) – Internal Hydraulic Jumps with Upstream Shear
gctg8bf9slnhibvua177fj2or4@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Winter chilling induces synchronous spring germination by Alexandrium fundyense cysts in the Nauset Marsh System
Ms. Alexis D. Fishcher
Doctoral Candidate, Biology Department
MIT-WHOI Joint Program
Abstract
20160602T120000
20160602T130000
0
Ms. Alexis Fischer
6csf0g15afmesb3h2b8lpmpp7k@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160602T140500
20160602T150000
Clark 201
0
Emily Shroyer, OSU. ‘Seasonal connections between Nares Strait and Petermann Glacier: Linking the sea ice, ocean, and ice shelf’. Clark 201.
93f9r7o5941q3i16b4f896k94g@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160607T140500
20160607T150000
Clark 507
0
Ben Harden, SEA / WHOI. ‘Upstream sources of the Denmark Strait Overflow: Observations from a high-resolution mooring array’. Clark 507
gkv4r8gf8a4et6b0j3gv6v97es@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160613T140500
20160613T150000
Clark 201
0
Aneesh Subramanian, Oxford. ‘Stochastic multi-scale atmospheric modeling: A route to improved forecasts for the tropics’. Clark 201
3raohdtt0amh0qdepqmn6fogvc@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160614T150500
20160614T160000
Clark 507
0
Allan Clarke, FSU. ‘El Nino and La Nina freshwater jets in the Western Equatorial Pacific’. Clark 507
93jr1dlnffckv68oju2j0b9nno@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Life at the Ice Edge: Does the timing of ice retreat set the table?
Dr. George L. Hunt, Jr.,
Research Professor
School of Aquatic and Fishery Sciences
University of Washington
Abstract
20160616T120000
20160616T130000
Redfield Auditorium
0
Dr. George L. Hunt, Jr.
siiejfvsuusc696b9mn5d9548c@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160621T150500
20160621T160000
Clark 507
0
Eleanor Frajka-Williams, NOC Southampton. ‘Reconciling observations of the Atlantic MOC variability’. Clark 507.
1852m1pltvjfcr40v5s8dh92rs@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Understanding the structure and changes of species interaction networks
Dr. Serguei Saavedra
Assistant Professor,
Department of Civil and Environmental Engineering,
Massachusetts Institute of Technology
Abstract
20160623T120000
20160623T130000
0
Dr. Serguei Saavedra
a79mfljughfifvo6s4mdnjkhr8@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Come In, We’re Open: The Changing Culture of Research
Dr. Carly Strasser, Program Officer
Data-Driven Discovery Initiative
Gordon and Betty Moore Foundation
Abstract
20160627T120000
20160627T130000
Redfield Auditorium
0
Dr. Carly Strasser
09kcvbspgd4itfcvcjifak8hc8@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160628T150500
20160628T160000
Clark 507
0
Amy Bower, WHOI. ‘The Charlie-Gibbs Fracture Zone: A crossroads of the Atlantic Meridional Overturning circulation’. Clark 507.
o5did2a34rsot4end7n6al5nlk@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Microbial signaling in a vast ocean:
the varied roles of small molecules
Dr. Kristen Whalen, Research Associate III,
Marine Chemistry & Geochemistry, WHOI
Abstract
20160630T120000
20160630T130000
Redfield Auditorium
0
Dr. Kristen Whalen
bn7m1k9vk79tp9m7e1htbncfe8@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160705T150500
20160705T160000
0
Cancelled
prqm2si12jeq86us419i4pidrc@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Effectively infinite: how can we ask questions of environmental sequencing data sets?
Dr. C. Titus Brown
School of Veterinary Medicine
University of California, Davis
20160707T120000
20160707T130000
Redfield Auditoirium
0
Dr. C. Titus Brown
up0ef34ufndv9scjuf9klh5a40@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160707T140500
20160707T150000
Clark 201
0
Ivan Ovsyannikov, U. Bremen. ‘Cubic homoclinic tangencies and resonances in two-dimensional symplectic maps.’ Clark 201.
n47nbc41hk0kdqqln6kmpq62j0@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160712T150500
20160712T160000
Clark 507
0
Dujuan Kang, Rutgers. ‘Understanding the energetics and variability of the Gulf Stream and associated eddies’. Clark 507.
redopepthleursbksnp8dnpi7s@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
20160714T120000
20160714T130000
0
No Bioseminar today
6107q6g88bcb157akgbn3j2qb8@google.com
20180502T144719Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
The Antarctic shelf seas are at present receiving increasing amounts of freshwater from the melting of the Antarctic Ice Sheet and its fringing ice shelves. In response, the surface ocean salinity in this region has declined. The talk will investigate the effects of the freshwater input on regional sea level, using satellite measurements of sea surface height (for months with no sea-ice cover) and a global ocean circulation model. It is found that from 1992 to 2011, sea-level rise along the Antarctic coast is at least 2 ± 0.8 mm yr−1 greater than the regional mean for the Southern Ocean. Further, on the basis of the model simulations, we conclude that this sea-level rise is almost entirely related to steric adjustment, rather than changes in local ocean mass, with a halosteric rise in the upper ocean and thermosteric contributions at depth.
20160719T121000
20160719T131000
54-915
0
Special SLS – Craig Rye CUSP (UK) – Trends in Antarctic Subpolar Sea Sea Level: Evidence of Increasing Glacial Melt?
fc9e3vli5rib7om4li6igbe748@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160719T150500
20160719T160000
Clark 507
0
Leo Maas, NIOZ. ‘Wave attractors.’ Clark 507.
4b2i9tkjnaj0kj4f5oehf8tt7k@google.com
20180502T144719Z
WHOI Seminar | Biological Oceanography
Ms. Emily A. Moberg
Ph.D. Candidate, Biological Oceanography,
WHOI Biology Department
Optimal bioeconomic management of changing marine resources
Abstract
20160721T120000
20160721T130000
Redfield Auditorium
0
Ms. Emily A. Moberg
s9cm0kk8jtbvockni5mtqlqehc@google.com
20180502T144719Z
WHOI Seminar | Physical Oceanography
20160726T150500
20160726T160000
Clark 201
0
Ruth Musgrave, MIT. ‘Tidally driven mixing: breaking lee waves, hydraulic jumps and the influence of subinertial internal tides’. Clark 201
rpbeoe68bh5117nll3nteqa1os@google.com
20180502T144720Z
WHOI Seminar | Biological Oceanography
Understanding Phytoplankton Communities Using Topic Models
Mr. Arnold Kalmbach
M.Sc. Student, McGill University
Abstract
20160728T120000
20160728T130000
Smith Conference Room
0
Mr. Arnold Kalmbach
hdf4esh5ft68j02h66btncki88@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20160802T150500
20160802T160000
Clark 507
0
Robert Nazarian, Princeton U. ‘Internal wave scattering in idealized and realistic continental slope canyons’. Clark 507
b4ju5qqrm5mvejq1q9jbprlp6s@google.com
20180502T144720Z
WHOI Seminar | Biological Oceanography
Summer Student Research Forum
This event will feature the Biology Department's Summer Student Researchers. There will be approx. 12 students presenting, including the Summer Students Fellows and several Guest Students. Presentations followed by poster session.
20160805T150000
20160805T160000
Redfield Auditorium and Lobby
0
Biology Department Summer Student Research Forum
p5nnqgmsclu5vo0vka0bs9vguo@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20160809T150500
20160809T160000
0
Alexey Fedorov, Yale. ‘The Pacific meridional overturning circulation (PMOC) in past warm climates’. Clark 507.
9gdjbotdmi1p2u08hol3ikuj6s@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20160811T140500
20160811T150500
Clark 201
0
Dhruv Balwada, FSU. ‘A lagrangian view of oceanic turbulence’. Clark 201
jvp05jffnc5hpifussa90sq1i4@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20160816T150500
20160816T160000
Clark 507
0
Georgy Manucharayan, Cal Tech. ‘Emergence of a multi-decadal eddy-memory mode and its impacts on the Beaufort Gyre variability’. Clark 201
p0muc73g9jltu8kbjln3i3dpfk@google.com
20180502T144720Z
WHOI Seminar | Biological Oceanography
Hot microbes in Antarctica: geothermal activity drives taxonomic and functional diversity in Deception Island
Dr. Vivian Pellizari
Associate Professor
Oceanographic Institute, University of Sao Paulo, Brazil
Abstract
20160818T120000
20160818T130000
Redfield Auditorium
0
Dr. Vivian Pellizari – CANCELLED
tulevvipqa4u7sq6fdi56gq1uc@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20160818T140500
20160818T150500
Clark 201
0
Rui Xin Huang, WHOI. ‘Adiabatic motions in the ocean and extended isopycnal analysis’. Clark 201
fq237d0k5h4uk3569rsr532r7g@google.com
20180502T144720Z
WHOI Seminar | Biological Oceanography
2016 Biology Steinbach Scholar
**Sponsored by the WHOI Academic Programs Office**
Evolutionary conserved mechanisms for carbon dioxide, pH and bicarbonate sensing and signal transduction
Dr. Martin Tresguerres
Assistant Professor
Scripps Institution of Oceanography
UC San Diego
Abstract
20160823T120000
20160823T130000
0
Dr. Martin Tresguerres
gci0lam9v6bhe39fj9geiqplsk@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20160823T150500
20160823T160000
Clark 507
0
John Toole, WHOI. ‘Moored observations of the Deep Western Boundary Current in the northwest Atlantic: 2004-2014’. Clark 507.
u1giiat0f9n5kaeju3j1bkbnp4@google.com
20180502T144720Z
WHOI Seminar | Biological Oceanography
The two sides of the bloom
Dr. Alexandre Mignot
Postdoctoral Research Associate
Department of Earth, Atmospheric and Planetary
Sciences, MIT
Abstract
20160825T120000
20160825T130000
Redfield Auditorium
0
Dr. Alexandre Mignot
cul0rka7hkld97rbptua1p4450@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20160830T150500
20160830T160000
Clark 507
0
Cancelled
a1fg33o5c5j0q16149aamnv5pg@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20160906T150500
20160906T160000
Clark 507
0
Alain de Verneil, Mediterranean Inst. Oceanography. ‘Biological tracer structure in the surface ocean: Effects of mesoscale forcing from the regional to sub-mesoscale’. Clark 507
f5bnhheudnapm7qiq8tgtpj6e8@google.com
20180502T144720Z
WHOI Seminar | Biological Oceanography
Response of macrozooplankton to environmental
variation: Evidence from the Red Sea
Dr. Peter Wiebe
Scientist Emeritus
WHOI Biology Department
Abstract
20160908T120000
20160908T130000
Redfield Auditorium
0
Dr. Peter Wiebe
7r1v9apia8c9p6k3dqpf2bq0u8@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20160909T150000
20160909T160000
20160923T150000
20161014T150000
20161021T150000
20161104T150000
20161111T150000
20161118T150000
20161209T150000
Building E25, Room 117
FREQ=WEEKLY;UNTIL=20161209T200000Z;BYDAY=FR
0
COG3 Seminar – TBD
20160909T150000-7r1v9apia8c9p6k3dqpf2bq0u8@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20160909T150000
20160909T160000
Building E25, Room 117
0
NO COG3 Seminar
07cgr7507fgt1fefaaikgpjdm0@google.com
20180502T144720Z
Title: Delayed CO2 emissions from mid-ocean ridge volcanism as a possible cause of late-Pleistocene glacial cycles
Abstract: The coupled 100,000 year variations in ice volume, temperature, and atmospheric CO2 during the late Pleistocene are generally considered to arise from a combination of orbital forcing, ice dynamics, and ocean circulation. Also previously argued is that changes in glaciation influence atmospheric CO2 concentrations through modifying subaerial volcanic eruptions and CO2 emissions. Building on evidence that ocean ridge volcanism responds to changes in sea level, it is suggested that ocean ridges play an important role in generating late-Pleistocene 100 ky glacial cycles.
If all volcanic CO2 emissions responded immediately to changes in pressure, subaerial and ocean-ridge volcanic emissions anomalies would oppose one another. At ocean ridges, however, the egress of CO2 from the mantle is delayed by tens-of-thousands of years, or longer, owing to ascent time. A simple model involving temperature, ice, and CO2 is presented that oscillates at ~100 ky time scales when incorporating a delayed CO2 contribution from ocean ridge volcanism, even if the feedback accounts for only a small fraction of total changes in CO2.
For more information, please see our event website.
20160912T120000
20160912T130000
Ida Green Lounge (9th Floor), Building 54, Cambridge, MA, United States
0
PAOC Colloquium: Peter Huybers (Harvard)
hnv2cijmd9pglo4enh8kaghedc@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20160913T150500
20160913T160000
Clark 507
0
Malcolm Scully, WHOI. ‘Observations of the transfer of energy and momentum to the oceanic surface boundary layer beneath breaking waves.’ Clark 507.
20160916T150000-7r1v9apia8c9p6k3dqpf2bq0u8@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
The role of magmatism during continental rifting
20160916T150000
20160916T160000
Building E25, Room 117
0
COG3 Seminar – Sara Mana (Salem State University)
7j9i2205fbrlbhkkk9roqg5nd8@google.com
20180502T144720Z
Title: Ocean mixing driven by tides: breaking lee waves, hydraulic jumps and the influence of subinertial internal tides
Abstract: The dissipation of tidal energy in the abyssal ocean leads to diapycnal mixing, raising the deep cold waters that form at high latitudes, and providing an important link in the energetics of the overturning circulation. Observations of deep ocean mixing show that it is both intermittent and highly inhomogeneous, with hotspots over regions of rough topography. Determining when, where and how much the ocean mixes is of critical importance for understanding the large scale circulation, with implications for biogeochemistry, heat transport and ocean modeling in a changing climate.
In this talk, I will focus on specific processes associated with tidally driven turbulence, combining field observations and numerical modeling of flows through a small channel that transects the crest of the Mendocino Ridge in the eastern Pacific, a site of mixed (diurnal and semidiurnal) tides. At this latitude the diurnal tide is subinertial and evanescent away from the topography, in contrast to the semidiurnal tide which is superinertial and radiating. We construct two numerical simulations to interpret our observations. First, we use a two-dimensional, nonhydrostatic, high resolution simulation to examine flow through the channel, and show that the observed turbulence arises from both hydraulic jumps and breaking internal lee waves. To place the processes in a regional context, we use a second simulation of tidally driven flow in a three-dimensional domain using realistic bathymetry, demonstrating the presence of diurnal bottom-trapped waves. These energetic internal waves generate strong currents close to the topography, and their interplay with the superinertial tidal constituent is of leading order importance in determining the timing and magnitude of the observed turbulence at the ridge.
Our observations and models illustrate some of the mechanisms by which energy is transferred from the tides to the large scale circulation, and highlight the role of subinertial trapped waves at this location. We posit that these waves may be important contributors to ocean mixing, especially at climatically sensitive high latitudes.
Event link: https://eapsweb.mit.edu/paoc-colloquium-ruth-musgrave-mit
20160919T120000
20160919T130000
Ida Green Lounge (9th Floor), Building 54, Cambridge, MA, United States
0
PAOC Colloquium: Ruth Musgrave (MIT)
cs642cgnq9ccod34j0oo1ageg4@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20160920T150500
20160920T160000
Clark 507
0
Viviane Menezes, WHOI. ‘Accelerated freshening of Antarctic Bottom Waters over the last decade (2007-2016) in the Southern Indian Ocean’. Clark 507
20160923T150000-7r1v9apia8c9p6k3dqpf2bq0u8@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20160923T150000
20160923T160000
Building E25, Room 117
0
NO COG3 Seminar – Student Holiday
umfldtljfpqvk5ij10cu2f3fmo@google.com
20180502T144720Z
Title: Twenty-Years of the Global Ocean Circulation: Means and Changes
Abstract: An over-arching goal of the World Ocean Circulation Experiment (WOCE) was to describe and understand the full three-dimensional time- evolving global ocean circulation from days to about a decade. The intention was to quantify and understand its changing climate impacts. To that end, the Estimating the Ocean Circulation and Climate (ECCO) consortium was formed to exploit the global data sets that emerged from WOCE and its successor programs (Argo, altimetry, hydrography, meteorology, etc.) combined with a general circulation model. Now there exists a dynamically consistent time-evolving ocean state estimate also (almost) consistent with all of the data over 24 years. The state estimate makes possible discussion of basic budgets and their changes (heat and freshwater content, kinetic and potential energy), raises interesting questions of its meaning, accuracy and full depiction. I will emphasize the global ocean properties and their changes over 20 years with some representative regional examples. This talk constitutes an invitation to the wider community to extend the available analyses.
For more information, please see our event website.
20160926T120000
20160926T130000
Ida Green Lounge (9th Floor), Building 54, Cambridge, MA, United States
0
PAOC Colloquium: Carl Wunsch (MIT)
1s62fulcc4qrfrtkt5ajr7624g@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20160927T150500
20160927T160500
Clark 507
0
Raffaele Ferrari, MIT. ‘A model of the ocean overturning circulation with two closed basins and a reentrant channel’. Clark 507
ajbge6qvqsdsdlrer91bchadsk@google.com
20180502T144720Z
WHOI Seminar | Biological Oceanography
Drs. Bill Karp, Sofie Van Parijs , and Dvora Hart (NEFSC); Dr. Scott Gallager (WHOI)
Panel Discussion on Transitioning Technology to NMFS Operations
Abstract
**SPECIAL SEMINAR sponsored by WHOI, CINAR, and NEFSC**
20160928T121500
20160928T131500
NEFSC Stephen H. Clark Conference Room, NOAA Aquarium Building
0
Panel Discussion on Transitioning Technology to NMFS Operations
20160930T150000-7r1v9apia8c9p6k3dqpf2bq0u8@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Using gut molecular markers to reveal our ancestors' gut microbiome
20160930T150000
20160930T160000
Building E25, Room 117
0
COG3 Seminar – Ainara Sistiaga (MIT)
n8r707p72kfpibgtlusivj26lc@google.com
20180502T144720Z
Title: El Niño-climate change links from corals
Abstract: Coral reef ecosystems have been heavily damaged by the last year’s record-breaking El Niño event, and will come under increasing stress from rising temperatures and ocean acidity in coming decades. The magnitude and frequency of future ocean temperature extremes will determine the pace of reef degradation, with more frequent temperature extremes accelerating the demise of the most vulnerable reef systems. In this presentation, I will use monthly-resolved records of past ocean temperature extremes based on the geochemical analysis of coral records to argue that climate change has already translated into a fundamental change in El Niño properties, tilting the ocean-atmosphere system towards more frequent El Niño events in coming decades. The effects of such a shift on the world’s reef would be profound, as I present evidence from recent surveys of remote coral reef ecosystems across the 2015/2016 El Niño event. Our sustained study illustrates how interdisciplinary teams are required to address some of the most pressing questions about the future of coral reefs under continued climate change.
20161003T120000
20161003T130000
Ida Green Lounge (9th Floor), Building 54, Cambridge, MA, United States
0
PAOC Colloquium: Kim Cobb (Georgia Tech)
u7d38v147utkgtt0vr2lcjgffc@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20161004T150500
20161004T160500
Clark 507
0
Mohamad M. Nasr-Azadani, UCSB. ‘Gravity currents in sheared and stratified ambients: Numerical Simulations and vorticity modeling’. Clark 507
8fq7r97phuk895oaspp7ioq50s@google.com
20180502T144720Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
El Ninõ–Southern Oscillation is here considered as large (time) scale phenomenon emerging from a complex and fast general dynamical system.
This seminar has two main goals. The first one is to give a physically reasonable explanation for the use of stochastic models for mimicking the apparent random features of the El Ninõ–Southern Oscillation (ENSO) phenomenon. The second one is to show how it is possible to obtain, with the present approach, some analytical results concerning the stationary density function of the anomaly sea surface temperature, and the occurring timing of strong El Ninõ events.
These results fit well the data from observations, reproducing the asymmetry and the power law tail of the histograms of the NIÑO3 index and the timing of 2-7 years for intermediate El Ninõ events.
The approach is based on some of our recent theoretical results in the field of the dynamical origin of stochastic processes. More precisely, we apply this approach to the celebrated recharge oscillator model (ROM), weakly interacting by a multiplicative term with a general deterministic system (Madden-Julian Oscillations, westerly wind burst, etc.), and we obtain a Fokker-Planck Equation that describes the statistical behavior of the ROM.
For more details
— M. Bianucci, Geophysical Res. Lett., 43(1), 386-394 http://dx.doi.org/10.1002/2015GL066772
— M. Bianucci, Journal of Statistical Mechanics: Theory and Experiment 2015, P05016 (2015), http://stacks.iop.org/1742-5468/2015/i=5/a=P05016;
— M. Bianucci, Int. Journal of Mod. Phys. B 0, 1541004 (2015), http://www.worldscientific.com/doi/abs/10.1142/S0217979215410040
20161005T120000
20161005T130000
54-915
0
SLS – Marco Bianucci (ISMAR – CNR) – Modeling El Nino–Southern Oscillation: analytical results
tjfsr9r4kl5sajoin114ke60s4@google.com
20180502T144720Z
WHOI Seminar | Biological Oceanography
Spatial and temporal change in zooplankton size in the North Atlantic
Dr. Claudi Castellani, Research Fellow
Sir Alister Hardy Foundation for Ocean Science
Plymouth, UK
Abstract
20161006T120000
20161006T130000
Redfield Auditorium
0
Dr. Claudia Castellani
gnvb5p0kei47uaoqlvlq4n5tuo@google.com
20180502T144720Z
MIT Seminar | PAOC Houghton Lectures
The contemporary global carbon budget.
The global carbon cycle plays a key role in regulating climate and climate change. Natural reservoirs on land and in the ocean hold large quantities of carbon, which is exchanged with the atmosphere on time scales ranging from seconds to hundreds of thousands of years. This first lecture will explain what we know about the contemporary carbon cycle. It will detail the processes that regulate the storage of carbon in the terrestrial biosphere and in the ocean and present the latest data on the trends and variability in these ‘carbon sinks’. The observed changes in the carbon sinks will be discussed in the context of a changing climate.
20161007T090000
20161007T100000
54-915
0
Houghton Lecture – Corrine Le Quere
20161007T150000-7r1v9apia8c9p6k3dqpf2bq0u8@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20161007T150000
20161007T160000
Building E25, Room 117
0
NO COG3 Seminar
j9on34pntp5s1upjojfldlb080@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20161011T150500
20161011T160500
Clark 507
0
Jian Zhao, WHOI. ‘Mesoscale process in the Iceland Basin’. Clark 507
di719bd44rdc10pg1jv5hlmvhg@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20161013T140500
20161013T150500
0
Masatoshi Miyamoto, U. Tokyo. ‘Characteristics and mechanisms of deep mesoscale variability south of the Kuroshio Extension’. Clark 201
ai1ec-819063@oceans.mit.edu
20180502T144720Z
Special Events
Allison Provaire; provaire@mit.edu
The John Carlson Lecture communicates exciting new results in climate science to the general public. Free of charge and open to the general public, the lecture is made possible by a generous gift from MIT alumnus John H. Carlson to the Lorenz Center in the Department of Earth, Atmospheric and Planetary Sciences, MIT.
Speaker:
Richard Alley, Penn State
Event website:
http://bit.ly/2aWlCd2
ical
Date:
Thursday, October 13,
7:00pm to 9:00pm
Location:
Simons IMAX Theatre, New England Aquarium
"Big Ice: Antarctica, Greenland, and Boston"
An ice sheet is a two-mile-thick, continent-wide pile of old snow, spreading under its own weight and sculpting the land beneath. The ice sheet that buried Boston 20,000 years ago melted when slowly acting features of Earth’s orbit raised summer sunshine and atmospheric CO2, warming the climate. The history of that Ice Age can still be read in Boston Harbor, and in the layers of the surviving ice sheets on Antarctica and Greenland. But, more warming may melt those ice records, as break-off of huge icebergs and outburst floods speed sea-level rise.
About the Speaker
Dr. Richard Alley is an Evan Pugh Professor of Geosciences in Penn State's College of Earth and Mineral Sciences. His research interests focus on glaciology, sea level change and abrupt climate change, and he frequently discusses earth sciences on major media outlets, including NPR, BBC and PBS. He is widely credited with showing that the earth has experienced abrupt climate change in the past—and likely will again, based on his meticulous study of ice cores from Greenland and West Antarctica.
For more information contact: Allison Provaire, provaire@mit.edu
More about previous Carlson Lectures here.
Tickets: https://eapsweb.mit.edu/sixth-annual-john-h-carlson-lecture-new-england-aquarium.
20161013T190000
20161013T210000
Simons IMAX Theatre @ New England Aquarium
0
Sixth Annual John H. Carlson Lecture at the New England Aquarium
Car
https://eapsweb.mit.edu/sixth-annual-john-h-carlson-lecture-new-england-aquarium
qeu1ldeocd0j7r30qpn9vin87s@google.com
20180502T144720Z
MIT Seminar | PAOC Houghton Lectures
Marine ecosystems and ocean acidification.
The ocean holds 50 times more carbon than the atmosphere. Because of its large buffer capacity, the ocean will eventually absorb 60 to 85% of the carbon dioxide emitted to the atmosphere on a time scale of 1000 years or longer. However the uptake of carbon dioxide by the ocean has the side effect of acidifying the water, with negative consequences for marine ecosystems and unclear implications for the functioning of the marine carbon cycle. This lecture will detail the linkages between marine ecosystem processes (from bacteria to jellyfish) and the carbon cycle. It will show how ecosystem processes can be understood through their biogeochemical functionality, and explain the knowns and unknowns of the impacts of ocean acidification. The lecture will end with a discussion of how changes in marine ecosystems could have knock on effects on climate regulation.
20161014T090000
20161014T100000
54-915
0
Houghton Lecture – Corrine Le Quere
20161014T150000-7r1v9apia8c9p6k3dqpf2bq0u8@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
A view of the Hadean Earth: petrogenesis of the oldest rocks within the Acasta Gneiss Complex
20161014T150000
20161014T160000
Building E25, Room 117
0
COG3 Seminar – Jesse Reimink (Carnegie)
tqot1h0n30brahq5lruqdg0ggo@google.com
20180502T144720Z
Title: The response of tropical low clouds to climate change
Abstract: Uncertainties in how tropical low clouds respond to climate change continue to dominate climate projections. They have resisted reduction for decades. Because of a convergence of what is feasible computationally on large scales (general circulation models) and small scales (large-eddy simulations), and because of the wealth of detailed observations that are now available, substantial progress on the low-cloud problem is now within reach. In this talk, I will describe recent progress in:
(a) constraining the low-cloud response to climate change observationally,
(b) understanding how the large-scale energy balance controls the low-cloud response, and (c) simulating the low-cloud response with large-eddy simulations that are driven in a way that respects the large-scale energy balance.
The results consistently indicate a positive feedback from tropical low clouds on global warming.
For more information, please see our PAOC Colloquium event page at:
https://paocweb.mit.edu/events/calendars/colloquium
20161017T120000
20161017T130000
Ida Green Lounge (9th Floor), Building 54, Cambridge, MA, United States
0
PAOC Colloquium: Tapio Schneider (Caltech)
rdql31vrbpqiqslenbmvlupcj4@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20161018T150500
20161018T160500
Clark 507
0
Chris Piecuch, Atmospheric and Environmental Research. ‘Inter annual sea level changes on the North American Northeast Coast: Influence of local atmospheric forcing’. Clark 507
er737t0tcc2jp3q2kbke0fbopc@google.com
20180502T144720Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Ocean Property Fluxes: a Pseudo-Lagrangian Approach
Lagrangian methods can provide insight into complex stirring and transport processes. These methods can provide a skeleton or template that allows one to identify regions of rapid stirring, transport, and transport barriers. 'Lobe dynamics', one of the most beautiful techniques in the toolbox, provides for the measurement and visualization of transport and exchange across moving boundaries. Other methods allow for the identification of natural barriers such as the material boundary of a coherent eddy. The focus is entirely on fluid 'material' transport (volume transport) and fluxes of oceanographically important properties such as heat, salt, vorticity and chemical and biological tracers are relevant only to the extent that they are conserved following fluid motion. In addition, lobe dynamics can become cumbersome when the flow field is complex. I will talk about a generalize approach that enables consideration of a variety of property fluxes, provides a simplified application to complex flow fields, and attempts to preserves the beauty of the original approach.
20161019T120000
20161019T130000
54-209
0
SLS – Larry Pratt (WHOI)
tii3h3gdpv5kcfvfff1f2jfato@google.com
20180502T144720Z
WHOI Seminar | Biological Oceanography
Trait-based modeling of larval dispersal in the Gulf of Maine
Mr. Benjamin T. Jones
Doctoral Candidate, MIT/WHOI Joint Program
WHOI Biology Department
Abstract
20161020T120000
20161020T130000
0
Benjamin T. Jones
hnppmp72jfa5kt129out5evpsg@google.com
20180502T144720Z
MIT Seminar | PAOC Houghton Lectures
Potential and risks of Carbon Geoengineerin.
Multiple options have been proposed to deliberately enhance the storage of carbon in natural reservoirs, and thus reduce the magnitude of climate change and/or the efforts otherwise needed to reduce greenhouse gas emissions directly. These ‘Carbon Geoengineering’ options range from afforestation to bio-energy with carbon capture and storage to ocean iron fertilisation. But what is their potential (and their costs!), and what are the possible unintended consequences? This lecture will give an overview of the current understanding on this rapidly moving topic.
20161021T090000
20161021T100000
54-915
0
Houghton Lecture – Corrine Le Quere
20161021T150000-7r1v9apia8c9p6k3dqpf2bq0u8@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Megeagravel on the move: storm, waves, boulder transport, and the erosion of rocky coasts
20161021T150000
20161021T160000
Building E25, Room 117
0
COG3 Seminar – Rónadh Cox (Williams College)
06u3jhh47ojalv3ksfdf8qmeh4@google.com
20180502T144720Z
Marine microbial diversity and nitrogen: does species diversity matter?
Marine microorganisms are responsible for half of the biological productivity on Earth, but are reliant on supplies of major nutrients and trace elements. Biological availability of dissolved inorganic forms of nitrogen is one of the most critical factors that constrains productivity and biogeochemical cycling in ocean ecosystems. The nitrogen cycle is being dramatically affected by anthropogenic activities leading to known and undoubtedly as yet unknown impacts on the oceans. Marine microorganisms are key components of ocean ecosystems, and are important in food webs, as well as cycling elements, such as nitrogen, from one chemical form to another. The species of marine microorganisms in the environment are still poorly known, because many of the important species have been difficult to obtain in laboratory culture. Molecular biology and genomics approaches have identified new species, and also have shown that known taxa are comprised of surprisingly great diversity of closely related subspecies that have different ecological niches. Is this diversity important for the nitrogen cycle of the sea?
Only a few types of microorganisms are able to draw on the rich source of nitrogen in the atmosphere (78% of the atmosphere); these organisms, called nitrogen-fixing microorganisms (diazotrophs) are very important components of oceanic ecosystems, are very difficult to study, and are likely to be sensitive to changes in climate and nitrogen perturbations. Technological advances have made it possible to study how the complex microbial communities respond to changes in nitrogen availability, including the use of remotely deployed robotic laboratories. Only within the past few decades, using these cultivation-independent approaches, a novel unicellular symbiosis between 2 single-celled microorganisms was discovered that now appears to be one of the most abundant nitrogen-fixing microorganisms, and plays a key role in global oceanic nitrogen cycling. I will discuss how technological advances are needed to determine how microbial communities respond to global climate change, and whether species diversity is important in how microbial communities respond to nitrogen, using the discovery of a very unusual nitrogen-fixing cyanobacteria called UCYN-A as an example.
20161024T120000
20161024T130000
Ida Green Lounge (9th Floor), Building 54, Cambridge, MA, United States
0
PAOC Colloquium: Jonathan Zehr (UC Santa Cruz)
ai1ec-818240@oceans.mit.edu
20180502T144720Z
Special Events,Symposia
Kerry A. Emanuel, Professor of Atmospheric Science at the Massachusetts Institute of Technology, to speak at the Radcliffe Institute for Advanced Study at Harvard. More about the event here.
This event is free and open to the public. Doors open at 4:45 p.m.; lecture begins at 5 p.m. Part of the 2016–2017 Oceans Lecture Series. A larger, one-day public symposium on the topic takes place on Friday, October 28, 2016.
20161024T164500
20161024T180000
+42.376218;-71.122349
Sheerr Room, Fay House @ Fay House, 10 Garden St, Cambridge, MA 02138, USA
0
Kerry Emanuel–Harvard’s Radcliffe Institute Oceans Lecture Series
dodrmf8dhrhm3e1ubac371jveo@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20161025T150500
20161025T160500
Clark 507
0
Karl Helfrich, WHOI. ‘Instabilities of internal solitary waves’. Clark 507.
0l8inq5v99j6i45p17dim1skj0@google.com
20180502T144720Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Redox chemistry and ecological dynamics as underlying mechanisms for chemoautotrophic control of the primary nitrite maximum
The primary nitrite maximum (PNM) – the accumulation of nitrite at the base of the euphotic zone – is a ubiquitous but poorly understood oceanographic feature. I will discuss how ecological dynamics and redox chemistry can explain the formation of the PNM by chemoautotrophic nitrifying microorganisms. Theoretical descriptions of nitrifying metabolisms, reflecting their underlying redox chemistry, results in the emergence of a PNM in a marine ecosystem model. I also discuss the implications for understanding rates of new production using this more mechanistic representation of nitrification.
20161026T120000
20161026T130000
54-915
0
SLS – Emily Zakem (MIT)
6tma5vcll8l79h7vi71vdu6lag@google.com
20180502T144720Z
WHOI Seminar | Biological Oceanography
Using acoustics to prioritize management
decisions to protect coastal dolphins:
a case study using Hawaiian spinner dolphins
Dr. Heather Heenehan
Northeast Fisheries Science Center, NOAA
Abstract
20161027T120000
20161027T130000
Redfield Auditorium
0
Dr. Heather Heenehan
toa1t42k6tp04at5csb45hridc@google.com
20180502T144720Z
MIT Seminar | PAOC Houghton Lectures
Reaching net zero carbon balance in the 21st Century.
The Paris Agreement on climate change has an ambition of balancing the global emissions and sinks of greenhouse gases in the second half of this century in order to limit climate change and its impacts. This lecture will explain the scientific understanding behind the links between global temperature change and cumulative carbon emissions, and detail the underlying time scales, amplitude of change, and uncertainties. It will present a range of model projections of climate change this century and discuss their implicit assumptions about future carbon management and future response of the natural carbon cycle to climate change. The lecture will also discuss the risks of large and non-linear responses of the carbon cycle to a changing climate (so-called ‘tipping points’) and their potential consequences. It will conclude the full lecture series by suggesting ways to support societal responses to climate change that the students might like to pursue throughout their careers.
20161028T090000
20161028T100000
54-915
0
Houghton Lecture – Corrine Le Quere
20161028T150000-7r1v9apia8c9p6k3dqpf2bq0u8@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Understanding microbial ecology in the deep terrestrial biosphere: a geochemical and metagenomic approach
20161028T150000
20161028T160000
Building E25, Room 117
0
COG3 Seminar – Lily Momper (MIT)
dkp31vb6t4shfmbdu93ro3rrqc@google.com
20180502T144720Z
“Microbe-mediated trace gas fluxes—linking ecosystem genomics to atmospheric composition”
Microorganisms play a significant role in driving biogeochemical cycles. These cycles include biosphere-atmosphere exchange of trace gases (e.g., CO2, CH4) that influence atmospheric composition and climate. Soils teem with microbial life that produce and consume trace gases. Understanding microbe-environment interactions is critical for predicting the response of terrestrial ecosystems to changes in land use and climate.
In my research, I quantify the microbial imprint on atmospheric composition and climate using an interdisciplinary set of methods, ranging from genomics to micrometeorology. My work focuses on resolving the genomic underpinnings of microbe-mediated biogeochemical transformations in soils that drive significant atmospheric fluxes (e.g., H2, COS, 18O-CO2, CO2, CH4). The goal of my work is to determine when and how projections of biogeochemical transformations are improved by better representation of underlying biological drivers.
20161031T120000
20161031T130000
Ida Green Lounge (9th Floor), Building 54, Cambridge, MA, United States
0
PAOC Colloquium: Laura Meredith (UofA)
loqqebtvf9gka4i5h01a0ujl90@google.com
20180502T144720Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Scaling properties of Arctic sea ice deformation in high-resolution viscous-plastic sea ice models
Many climate models use a rheology of the viscous-plastic type to simulate sea ice dynamics. With this rheology, large scale velocity and thickness fields can be realistically simulated, but the representation of small scale deformation rates and Linear Kinematic Features (LKF) is thought to be inadequate. However, at high resolution (< 5 km) the rheology starts to produce lines of localised deformation rates. In this study we use results from a 1-km Pan-Arctic model to investigate the influence of these deformation features on the scaling properties of sea ice deformation. For evaluation the EGPS satellite data set of small-scale sea ice kinematics for the Central Arctic (successor of RGPS) is used.
The modelled sea ice deformation shows multi-fractal spatial scaling and, in this sense, agrees with the satellite data. In addition, the temporal coupling of the spatial scaling is reproduced as well. Furthermore, we examine the regional and seasonal variations of spatial scaling properties and its dependence on the ice condition, i.e. sea ice concentration and thickness, which are in agreement with previous RGPS studies.
20161031T150000
20161031T160000
54-209
0
SLS – Nils Hutter (Alfred Wegener Institute)
bpof1cjcge4mclu6vhgipc8hko@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20161101T150500
20161101T160500
Clark 201
0
Henrik Soiland, Inst. Marine Research. ‘The Lofoten Basin Eddy – a permanent feature of the Norwegian Sea’. Clark 201
6bp5skbdjcmosblm18biliepgk@google.com
20180502T144720Z
MIT Seminar | PAOC Houghton Lectures
Humidity-cloud-precipitation feedbacks and convective organization
20161103T140000
20161103T150000
54-915
0
Houghton Lecture – Chris Bretherton (Univ. of Washington)
20161104T150000-7r1v9apia8c9p6k3dqpf2bq0u8@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20161104T150000
20161104T160000
Building E25, Room 117
0
NO COG3 Seminar
dbga52fq7oqfq72ad5kj04g7b8@google.com
20180502T144720Z
Title: A metabolic constraint on the biogeography of marine species
Abstract: Oxygen played a key role in the evolution of marine ecosystems. However, oxygen has not generally been considered a major constraint on the contemporary biogeography of species outside regions of exceptionally low O2. I will present a combination of physiological, climate, and species distribution data, to argue that the limits of several diverse species ranges are governed by the ratio of oxygen supply and demand, even in the well-oxygenated Atlantic Ocean. These limits correspond to an energetic requirement for organismal activity of about 2-5 times that at rest, a ratio that is shared by most terrestrial species. This metabolic constraint is rapidly tightened in the presence of climate warming due to the combination of warmer water and less O2. I will use Earth System Models to investigate and compare the loss of aerobically viable habitat in two periods of interest – the climate change projected for the 21st century and the end-Permian mass extinction.
20161107T120000
20161107T130000
Ida Green Lounge (9th Floor), Building 54, Cambridge, MA, United States
0
PAOC Colloquium: Curtis Deutsch (UW)
rjr0jhqqa4vuokkj0ktj5bcago@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20161108T150500
20161108T160500
Clark 507
0
Xiaolin Zhang, FSU. ‘On the Dynamical Relationship Between Equatorial Pacific Surface Currents, Zonally-Averaged Equatorial Sea Level and El Nino Prediction’. Clark 507
2mkb1gkqss0ulbueppk98dal4k@google.com
20180502T144720Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
20161109T120000
20161109T130000
54-915
0
Glenn Flierl (MIT)
h9grmnc6ns368g28j58dk11g3s@google.com
20180502T144720Z
WHOI Seminar | Biological Oceanography
Temperate-subtropical transition of marine ecosystems: a synoptic case around the Ulleung Basin of the East/Japan Sea
Dr. Chang-Keun Kang
Professor, School of Earth Sciences and Environmental Engineering,
Gwangju Institute of Science and Technology, Republic of Korea
Abstract
20161110T120000
20161110T130000
Redfield Auditorium
0
Dr. Chang-Keun Kang
20161111T150000-7r1v9apia8c9p6k3dqpf2bq0u8@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20161111T150000
20161111T160000
Building E25, Room 117
0
NO COG3 Seminar – Veteran’s Day
1dvosil3l15hc01vbc4a8nrg8o@google.com
20180502T144720Z
A Tale of Two Tracers: Radiocarbon and nitrous oxide isotopologues
and their sources and sinks from recent observations
Both CO2 and N2O are long-lived atmospheric trace gases that, coincidentally, become enriched in rare, heavy isotopes in the stratosphere followed by return to the troposphere, where the stratospheric enrichments are diluted by emissions of isotopically light CO2 (e.g., fossil fuel combustion) and N2O (e.g., microbial production). In this talk, I will focus on measurements of 14CO2 and of the oxygen and intramolecular nitrogen isotopic composition of N2O in the stratosphere and troposphere. For CO2, I will show how we use new observations in the stratosphere (e.g., Ref 1) to estimate empirically the global annual mean production rate of 14C by cosmic rays and the net 14C flux from the stratosphere to the troposphere useful for carbon cycle studies, as well as to monitor stratospheric residence times to see if they are changing in response to a predicted acceleration of the Brewer-Dobson Circulation as the climate warms. For N2O, I will show how stratospheric and tropospheric isotope observations reveal a ‘smoking gun’ for increases in agricultural emissions (similar to the Suess Effect for 14CO2) and how N2O isotope measurements can be used to distinguish between the influence of the stratospheric sink and oceanic and biospheric sources, demonstrating that isotope measurements can help in the attribution and quantification of surface sources in general (e.g., Ref. 2).
1. Kanu, A. M., L. L. Comfort, T. P. Guilderson, P. J. Cameron-Smith,D. J. Bergmann, E. L. Atlas, S. Schauffler, K. A. Boering, “Measurements and modeling of contemporary radiocarbon in the stratosphere,” Geophys. Res. Lett. 43, 1399–1406, doi:10.1002/2015GL066921, 2016
2. S. Park, P. Croteau, K. A. Boering, D.M. Etheridge, D. Ferretti, P. J. Fraser, K.-R. Kim, P.B. Krummel, R.L. Langenfelds, T.D. van Ommen, L.P. Steele, and C.M. Trudinger, "Trends and seasonal cycles in the isotopic composition of nitrous oxide since 1940," Nature Geoscience 5, 261-265, doi:10/1038/NGEO1421, 2012.
20161114T120000
20161114T130000
Ida Green Lounge (9th Floor), Building 54, Cambridge, MA, United States
0
PAOC Colloquium: Kristie A. Boering (UC Berkeley)
201i0785oebclspj16qn89c9l0@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20161115T150500
20161115T160500
Clark 507
0
Sanjiv Ramachandran, U. Mass Dartmouth. ‘Submesoscale processes in shallow, stratified layers: observations from the Bay of Bengal during the winter monsoon’. Clark 507
9qn6emngpg2i831ratfv3u8p14@google.com
20180502T144720Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Deciphering deep ocean circulation changes between the present and the last glacial
The paleoclimate record indicates that the deep ocean circulation and water masses have undergone major rearrangements between glacial and interglacial climates, which have likely played an important role in the observed atmospheric carbon dioxide swings by affecting the partitioning of carbon between the atmosphere and ocean. The mechanisms by which the deep ocean circulation changed, however, are still unclear and represent a major challenge to our understanding of past and future climates.
We address this question using a hierarchy of numerical models of varying complexity, ranging from a highly idealized ocean-only model to coupled climate simulations from the Paleoclimate Modelling Intercomparison Project (PMIP). The results suggest that various inferred differences in the deep ocean circulation and stratification between glacial and interglacial climates can be attributed to increased Antarctic sea-ice formation in a colder world. Colder temperatures lead to thicker ice, which is exported by winds. The associated increased freshwater export leads to saltier and denser Antarctic Bottom Water, consistent with high abyssal salinities inferred for the Last Glacial Maximum (LGM). The enhanced deep ocean stratification moreover results in a weakening and shoaling of the inter-hemispheric overturning circulation, again consistent with proxy evidence for the LGM.
The results also highlight the importance to distinguish between the equilibrium and transient response of the ocean circulation to climatic changes. The adjustment of the deep ocean circulation is found to be highly non-monotonic, with the response on centennial time-scales differing qualitatively from the equilibrium results. This distinction is rarely observable in complex coupled climate models, which cannot be integrated for sufficiently long times.
20161116T120000
20161116T130000
54-915
0
SLS – Malte Jansen (University of Chicago)
rt96r0ojhvmsvq6tud783hsbh0@google.com
20180502T144720Z
WHOI Seminar | Biological Oceanography
Biology Department Special Seminar
Biology All-Hands Meeting
Abstract
20161117T120000
20161117T130000
Redfield Aud
0
Biology All-Hands Meeting
11nvqng7jvau2ap5u1ieapltuo@google.com
20180502T144720Z
MIT Seminar | PAOC Houghton Lectures
Insights from high-resolution simulation of cloud feedbacks
20161117T140000
20161117T150000
54-915
0
Houghton Lecture – Chris Bretherton (Univ. of Washington)
20161118T150000-7r1v9apia8c9p6k3dqpf2bq0u8@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Chemical Controls on Calcite Dissolution Kinetics in Seawater
20161118T150000
20161118T160000
Building E25, Room 117
0
COG3 Seminar – Adam Subhas (Caltech)
3r1hc60nolila09bg1n4bqiujo@google.com
20180502T144720Z
Title: Inventing Atmospheric Science: Gordian Knots and the Quest for Prevision
Abstract: Atmospheric researchers have long attempted to untie the Gordian Knot of meteorology—that intractable and intertwined tangle of observational imprecision, theoretical uncertainties, and non-linear influences—that, if unraveled, would provide perfect prevision of the weather for ten days, of seasonal conditions for next year, and of climatic conditions for a decade, a century, a millennium, or longer. This presentation, based on Inventing Atmospheric Science (The M.I.T. Press, 2016), examines the work of three interconnected generations of scientists and the influence of three families of transformative technologies in the first six decades of the twentieth century, from the dawn of applied fluid dynamics to the emergence, by 1960, of the interdisciplinary atmospheric sciences.
About the speaker: Jim Fleming is the Charles A. Dana Professor of Science, Technology, and Society at Colby College, Maine. He earned a B.S. in astronomy from Pennsylvania State University, an M.S. in atmospheric science from Colorado State University,
and a Ph.D. in history from Princeton University. He has written extensively on the history of weather, climate, technology, and the environment including social, cultural, and intellectual aspects. His books include Meteorology in America (Johns Hopkins, 1990), Historical Perspectives on Climate Change (Oxford, 1998), The Callendar Effect (AMS, 2007), Fixing the Sky (Columbia, 2010), and Inventing Atmospheric Science (MIT, 2016). He is series editor of Palgrave Studies in the History of Science and Technology, a research associate of the Smithsonian Institution, a fellow of the American Association for the Advancement of Science, and a fellow of the American Meteorological Society.
Jim is a resident of China, Maine (not Mainland China!) He enjoys fishing, good jazz, good BBQ, seeing students flourish, and building the community of historians of science and technology. "Everything is unprecedented if you don't study history."
Profile: http://www.colby.edu/directory/profile/jfleming/
20161121T120000
20161121T130000
Ida Green Lounge (9th Floor), Building 54, Cambridge, MA, United States
0
PAOC Colloquium: James Fleming (Colby)
a0cjs9f8f6q551t8rifnp5lb3c@google.com
20180502T144720Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
The vertical structure of ocean eddies
Since we began observing the ocean surface with satellites,
it's been of interest to understand how the surface fields reflect motion
at depth. A series of recent modeling studies suggest the vertical structure
is fairly well-captured by a single mode, intensified near the surface and
decaying to zero with depth. A study of 69 globally-distributed current
meters supports this, in many locations outside of the tropics. The reason
for the dominance of a surface is explored theoretically, using a simple
two layer model. The latter predicts a wavenumber frequency spectra
which resembles that in the ocean, except at small scales. The latter are
shown to be more likely to transfer energy to large scales, leaving the
(non-dispersive) large scale waves in tact. A similar conclusion was made
previously from idealized numerical experiments.
20161122T120000
20161122T130000
54-915
0
SLS – Joe Lacasce (University of Oslo)
qsqa1mgrgh6pq3droobvhhr4g4@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20161122T150500
20161122T160500
Clark 507
0
Cancelled
20161125T150000-7r1v9apia8c9p6k3dqpf2bq0u8@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20161125T150000
20161125T160000
Building E25, Room 117
0
NO COG3 Seminar – Thanksgiving Vacation
ca874dkiaemk7vqdgbq88fk3p4@google.com
20180502T144720Z
Title: First results from year-around biogeochemical float observations in the Southern Ocean
Jorge L. Sarmiento, Princeton University
Abstract: Understanding of Southern Ocean biogeochemical and carbon system processes is severely hampered by the virtual absence of wintertime observations over most of the region. I report on initial findings by the Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) Project, which will eventually deploy ~200 Argo type floats equipped with nitrate, oxygen, pH and optical sensors, of which >50 have already been launched. Initial analysis of a subset of these floats exhibits wintertime behavior that differs dramatically from what had been inferred previously, with major implications for our understanding of the ocean carbon cycle.
20161128T120000
20161128T130000
Ida Green Lounge (9th Floor), Building 54, Cambridge, MA, United States
0
PAOC Colloquium: Jorge Sarmiento (Princeton)
qn510o9eftfon0877oph272tj0@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20161129T150500
20161129T160500
Clark 507
0
Mathieu Dever, Dalhousie U. ‘Investigating the dynamics of a buoyant coastal current using observations and a simple conceptual model’. Clark 507.
pk0iqfejbpehn1plfruqhpea5o@google.com
20180502T144720Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Stability and Internal Flow Variability of Ice Sheets
Ice streams are regions of fast-flowing ice embedded within ice sheets that account for the majority of mass transport from ice sheet interiors to the ocean. Variability of ice stream flow on centennial to millennial time scales plays an important role in the present mass balance of the West Antarctic Ice Sheet. In this talk, I show how a simple model of subglacial meltwater production coupled to ice flow explains the underlying physical mechanism for millennial-scale, unforced ice stream variability and predicts the transition to steady ice stream flow. The model equally well reproduces modern ice stream variability in the Siple Coast region of West Antarctica and Heinrich events, periods of increased ice discharge from the Laurentide Ice Sheet during the last glacial period. In a more realistic, purpose-built model, the same mechanism produces variability and rapid migrations of the ice stream grounding line. These migrations are always associated with mass imbalance near the grounding line, but not necessarily in the ice stream at large, which is important to consider when interpreting modern observations of grounding line variability. Under certain conditions, this ice stream variability may cause the grounding line to slow down for hundreds to thousands of years even as it retreats onto a reverse bed slope, before readvancing. Such behavior runs counter to the conventional theories predicting the instability of ice sheets on reverse bed slopes. Determining if such behavior occurs in real ice sheets is important when evaluating the likelihood of irreversible ice sheet collapse and rapid sea level rise in the future.
20161130T120000
20161130T130000
54-915
0
SLS – Alexander Robel (California Institute of Technology & University of Chicago)
tqeqb6c8rr4q8aj6gkpl9tk79c@google.com
20180502T144720Z
WHOI Seminar | Biological Oceanography
Microbial Community Assembly and Function on Model Marine Particles
Dr. Otto X. Cordero
Doherty Assistant Professor of Ocean Utilization
Department of Civil and Environmental Engineering
Massachusetts Institute of Technology
Abstract
20161201T120000
20161201T130000
Redfield Auditorium
0
Dr. Otto X. Cordero
20161202T150000-7r1v9apia8c9p6k3dqpf2bq0u8@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20161202T150000
20161202T160000
Building E25, Room 117
0
No COG3 Seminar
b96dpbmi2e321r9umguaqj1elk@google.com
20180502T144720Z
Title: Understanding storm tracks shifts: From the seasonal cycle to future climate change
Abstract: Storm tracks dominate weather and climate in the extratropics. In response to forcing, e.g. seasonal insolation, ENSO, ozone depletion, increased CO2, storm tracks exhibit robust meridional shifts. Here we develop an energetic framework for storm track position. We apply it across a range of timescales to reveal robust regimes that help to explain why storm tracks shift meridionally.
20161205T120000
20161205T130000
Ida Green Lounge (9th Floor), Building 54, Cambridge, MA, United States
0
PAOC Colloquium: Tiffany Shaw (U Chicago)
1vqdas7rpailo65d73688bl5c4@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20161206T150500
20161206T160500
Clark 201
0
Terry Joyce, WHOI. ‘On the slowing of the Deep Western Boundary Current southeast of Cape Cod: 2004-2014’. Clark 201
5g6bl6kgr3mktf5110aik0lplk@google.com
20180502T144720Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
20161207T120000
20161207T130000
54-915
0
SLS – Oliver Andrews (Tyndall Centre for Climate Change Research, University of East Anglia)
l53b7gdo69g7pn3luhdiajrd30@google.com
20180502T144720Z
WHOI Seminar | Biological Oceanography
Top-down control of coccolithophore populations during spring in a temperate shelf sea environment
Mr. Kyle Mayers
PhD Student, Marine Biogeochemistry,
National Oceanography Centre Southampton
Abstract
20161208T120000
20161208T130000
Redfield Auditorium
0
Mr. Kyle Mayers
gljvm978hngma95e8hb8m9lea8@google.com
20180502T144720Z
MIT Seminar | PAOC Houghton Lectures
Ultraparameterization: Using large eddy simulation for global simulation of boundary layer clouds and climate
20161208T140000
20161208T150000
54-915
0
Houghton Lecture – Chris Bretherton (Univ. of Washington)
20161209T150000-7r1v9apia8c9p6k3dqpf2bq0u8@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20161209T150000
20161209T160000
Building E25, Room 117
0
NO COG3 Seminar
sji490aa80k4cd6l4v0ttdtk38@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20161213T150500
20161213T160500
0
Cancelled
enootj7h0g9qv4m68l1dpcr708@google.com
20180502T144720Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20161216T150000
20161216T160000
Building E25, Room 117
0
NO COG3 Seminar – Finals Week/AGU
41na9ve8oeu1kk3je5sdgjnagg@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20161220T150500
20161220T160500
0
Cancelled
nhrv0urv9c3lpmtbhugav1qbio@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20161227T150500
20161227T160500
0
Cancelled
dkrhgngl4lmoe03n3bqn1s1ssg@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20170103T150500
20170103T160500
Clark 507
0
Cancelled
n2a24r058dp3p713notb7hrm2g@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
20170110T150500
20170110T160500
Clark 507
0
Young-Oh Kwon, WHOI. ‘North Atlantic Blocking Variability and Role of the Atlantic Multidecadal Oscillation’. Clark 507
v2guutppqmq5fej597g9gsl9k8@google.com
20180502T144720Z
WHOI Seminar | Biological Oceanography
Oceanographic influences on benthic fjord communities in the high Arctic
Dr. Kirstin Meyer
Postdoctoral Scholar
Woods Hole Oceanographic Institution
Abstract
20170112T120000
20170112T130000
Redfield Auditorium
0
Dr. Kirstin Meyer
diijpup835rtbtl3bb36rfguso@google.com
20180502T144720Z
WHOI Seminar | Physical Oceanography
Lateral mixing by mesoscale eddies is widely recognized as a crucial mechanism for the global ocean circulation and the associated heat/salt/tracer transports. The Salinity in the Upper Ocean Processes Study (SPURS) confirmed the importance of eddy mixing for the surface salinity fields even in the center of the subtropical gyre of the North Atlantic. We focus on the global salinity maxima due to their role as indicators for global changes in the hydrological cycle as well as providing the source water masses for the shallow overturning circulation.
We introduce a novel approach to estimate the contribution of eddy mixing to the global sea surface salinity maxima. Using a global 2D tracer experiments in a 1/10 degree MITgcm setup driven by observed surface velocities, we analyze the effect of eddy mixing using a water mass framework, thus focussing on the diffusive flux across surface isohalines. This enables us to diagnose temporal variability on seasonal to inter annual time scales, revealing regional differences in the mechanism causing temporal variability.Sensitivity experiments with various salinity backgrounds reveal robust inter annual variability caused by changes in the surface velocity fields potentially forced by large scale climate.
20170117T150500
20170117T160500
Clark 507
0
Julius Busecke, LDEO. ‘Temporal variability in eddy mixing in the global subtropics’. Clark 507.
5903rc7990lu7h5jpi81q0r0jg@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
Insights into zooplankton behavior from the largest anoxic basin, the
Black Sea: Observations with multifrequency scientific echosounder
Dr. Serdar Sakinin
Postdoctoral Fellow
WHOI Biology Department
Abstract
20170119T120000
20170119T130000
Redfield Auditorium
0
Dr. Serdar Sakinan
0c6arp1d01o746e526qphr8ntk@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170119T140500
20170119T150500
Clark 201
0
Carina Bringedal, U. Bergen. ‘Idealized models for wind driven variations in an overturning circulation’. Clark 201.
b2cucnmv3pe11dr4k3lgc1nj1c@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170124T150500
20170124T160500
Clark 507
0
David Nieves, WHOI. ‘Non-hydrostatic, rapidly rotating and stably stratified flows’. Clark 507
vvvsv61b64js9fn60mlps8itoo@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
Diurnal movement, diving and activity patterns of
juvenile green and hawksbill sea turtles in
Brewers Bay St Thomas US Virgin Islands
Dr. Paul Jobsis
Associate Professor and Director of
the Center for Marine & Environmental
Studies, University of the Virgin Islands
Abstract
20170126T120000
20170126T130000
Redfield Auditorium
0
Dr. Paul Jobsis
nol9amv4bcuebgiunj177dn9q0@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170131T150500
20170131T160500
Clark 507
0
Rhys Parfitt, WHOI. ‘To what extent do oceanic frontal zones affect mid-latitude weather and climate?’. Clark 507.
vug5k5n1o0vt2tcu6ik60s3vh4@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
Connections between aquaculture,
our food system and climate
Mr. Scott Lindell
Visiting Investigator
WHOI Biology Department
Abstract
20170202T120000
20170202T130000
Redfield Auditorium
0
Mr. Scott Lindell
4976enni5i3j1pu5nflav90cs0@google.com
20180502T144721Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Chasing Water: Lagrangian tracking of tracers, plastic and plankton through the global ocean
The ocean is in constant motion, with water circulating within and flowing between basins. As the water moves around, it caries heat and nutrients, as well as larger objects like planktonic organisms and litter around the globe.
The most natural way to study the pathways of water and the connections between ocean basins is using particle trajectories. The trajectories can come from either computing of virtual floats in high-resolution ocean models, or from the paths of free-flowing observational drifters (surface buoys or Argo floats) in the real ocean.
In this seminar, I'll give an overview of some recent work with Lagrangian particles. I will show applications to dynamical oceanography, marine ecology, palaeoclimatology and marine plastic pollution. Central to each of these studies is the question on how connected the different ocean basins are, and on what time scales water flows between the different regions of the ocean.
20170207T000000
20170207T010000
54-915
0
SLS — Erik van Sebille (Imperial College London)
t5ke92ulk1dnd2rbqjqu41l4as@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170207T150500
20170207T160500
Clark 507
0
Tom Rossby, URI. ‘Currents, fluxes and the MOC between Cape Farewell and Scotland’. Clark 507.
20170210T100000-n91e8qdrst0dg1c0kqh59dudk0@google.com
20180502T144721Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Linking fault-zone geology, fluid flow and seismicity at oceanic transform faults
20170210T100000
20170210T110000
Building E25, Room 119
0
COG3 Seminar – Jessica Warren (University of Delaware)
n91e8qdrst0dg1c0kqh59dudk0@google.com
20180502T144721Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20170210T100000
20170210T110000
20170210T100000
20170217T100000
20170224T100000
20170303T100000
20170324T100000
20170331T100000
20170414T100000
20170421T100000
20170505T100000
20170512T100000
Building E25, Room 119
FREQ=WEEKLY;UNTIL=20170512T140000Z;BYDAY=FR
0
COG3 Seminar – Speaker ()
20170213T120000-8ccmb0ifths3ko79iorelr6vsk@google.com
20180502T144721Z
Title: Monsoon circulations and tropical heterogeneous chlorine chemistry in the stratosphere
Abstract: This seminar presents novel findings that expand the range of latitudes over which heterogeneous chemistry operates in the stratosphere. It has long been thought that heterogeneous chlorine chemistry would only be important in the Antarctic and Arctic. Our new work shows that tropical heterogeneous chemistry is also important. Transport processes associated with the summer monsoons bring increased abundances of hydrochloric acid into contact with liquid sulfate aerosols in the cold tropical lowermost stratosphere, leading to heterogeneous chemical activation of chlorine species. The calculations indicate that the spatial and seasonal distributions of chlorine monoxide and chlorine nitrate near the monsoon regions of the northern hemisphere tropical and subtropical lowermost stratosphere could provide indicators of heterogeneous chlorine processing. In the model, these processes impact the local ozone budget and decrease ozoneabundances, implying a chemical contribution to longer-term northern tropical ozone profile changes at 16-19 km.
20170213T120000
20170213T130000
Ida Green Lounge (9th Floor), Building 54, Cambridge, MA, United States
0
**CANCELLED** PAOC Colloquium: Susan Solomon, MIT
8ccmb0ifths3ko79iorelr6vsk@google.com
20180502T144721Z
20170213T120000
20170213T130000
20170227T120000
20170306T120000
20170313T120000
20170320T120000
20170327T120000
20170403T120000
20170410T120000
20170417T120000
20170424T120000
20170501T120000
FREQ=WEEKLY;COUNT=12;BYDAY=MO
0
PAOC Colloquium
me9klcq795qiesh92ut2brjc4g@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170214T150500
20170214T160500
Clark 507
0
Kate Lowry, WHOI. ‘The influence of sea ice and hydrography on phytoplankton bloom dynamics in the Chukchi Sea’. Clark 507
5admdpcsqbl9p2c7admptacdk8@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
Building a tool kit to assess reproductive performance of sea scallop populations
Ms. Skylar Bayer
Ph.D. Candidate in Marine Biology
School of Marine Sciences
University of Maine
Abstract
20170216T120000
20170216T130000
Redfield Auditorium
0
Ms. Skylar Bayer
usev2apv2hqk7s86sv039o2bf4@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170216T140500
20170216T150000
Clark 201
0
Steingrimur Jonsson, U. Akureyri. ‘Study of water exchange, circulation and oxygen levels in a small fjord in Iceland following the death of 52 thousand tons of herring’. Clark 201
20170217T100000-n91e8qdrst0dg1c0kqh59dudk0@google.com
20180502T144721Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Life under ice: Exploring the microbial landscape of Antarctic lakes
20170217T100000
20170217T110000
Building E25, Room 119
0
COG3 Seminar – Tyler Mackey (MIT)
20170220T120000-8ccmb0ifths3ko79iorelr6vsk@google.com
20180502T144721Z
Title: A few new perspectives on humanity and Earth’s climate
Abstract:
When fossil fuel energy was discovered, the timing and intensity of the resulting climate impacts depended on what the natural CO2 concentration in the atmosphere was at that time, which could have been anything. The radiative forcing scales as the ratio of the fossil fuel CO2 in the atmosphere to the background, natural CO2 concentration. Assuming continued exponential growth in the fossil carbon in the atmosphere, altering the background concentration has the effect of dialing the radiative forcing and climate response back and forth in time. If the natural concentration had been a factor of two or more lower, the climate impacts of fossil fuel CO2 release would have occurred about 50 or more years sooner, making it much more challenging for the developing human society to scientifically understand the phenomenon of anthropogenic climate change in time to prevent it.
Now that we understand the situation, much of our decision-making progress involves money. The costs of cutting CO2 emissions (mitigation) can be balanced against a construct called the Social Cost of Carbon, which is formulated to represent future costs as their present-day equivalents using discounting, in order to compare fairly against the immediate costs of mitigation. U.S. EPA valued the SCC at about $40 / ton of CO2. I will show the derivation of a different but complementary number, the potential Ultimate Social Cost of Carbon to 5000 future human generations of the climate impacts from fossil CO2 release. Long term sea level rise of 50 meters provides the clearest impact. I get about $40k / ton CO2. The formulation treats humanity as any other component of the terrestrial biosphere, in an end-member case where we do not transcend biological limitations such as by soil and water availability. Costs are integrated through time based on the assumption that each generation of humanity values its world (whatever it may look like) equally to any other generation, in particular to our own.
20170221T120000
20170221T130000
0
PAOC Colloquium: David Archer (U Chicago)
hn0vrl3v3khlk6nb701l05d7ac@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170221T150500
20170221T160500
Clark 507
0
Matthew Falder, U. Birmingham. ‘Sharp transition from internal waves to stratified turbulence observed in seismic reflection images’. Clark 507
t6tjald4oboucoglctjbv2mqss@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
Copepod biogeography in a changing Arctic Ocean
Dr. Zhixuan Feng
Postdoctora Investigator
WHOI Biology Department
Abstract
20170223T120000
20170223T130000
0
Dr. Zhixuan Feng
20170224T100000-n91e8qdrst0dg1c0kqh59dudk0@google.com
20180502T144721Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
The Mars Mantle: Insights from Rover Missions and Terrestrial Analogues
Basaltic igneous rocks represent samples of a planet’s
interior and give insight to the degree of heterogeneity or
homogeneity of the interior. This talk will focus on the
origins of geochemical diversity and estimates of oxygen
fugacity among igneous and least altered sedimentary rocks
measured by rover missions. Relative influences of partial
melting, fractional crystallization, and mantle metasomatism
will be explored. Terrestrial mantle xenoliths from alkaline
provinces are considered as analogues to the Martian
mantle, including cumulate xenoliths from post-shield
Hawaiian volcanoes and metasomatized xenoliths from
Mount Taylor Volcanic Field (New Mexico). Such a
comparison is worthwhile because the Martian upper
mantle is likely a mixture of primary, residual,
metasomatized, and cumulate mantle.
20170224T100000
20170224T110000
Building E25, Room 119
0
COG3 Seminar – Mariek Schmidt (Brock University)
70s03f34m8abqg7qu8bai18etg@google.com
20180502T144721Z
Eddy-driven subduction of carbon and oxygen from the upper ocean
How organic carbon and oxygen produced through photosynthesis in the upper ocean make their way in to the stratified interior is of relevance for the biological pump. Sinking of particulate organic matter contributes to exporting carbon and nitrogen. But, oxygen necessarily relies on an advective flux that feeds the bacterial demand for decomposing organic matter at depth. Glider profiles of oxygen, backscatter and chlorophyll are analyzed following the spring phytoplankton bloom in the subpolar North Atlantic and show signatures of subducting water features intertwined within the eddy field. A numerical model reveals how eddies subduct surface waters rich in carbon and oxygen during the phase of mixed layer stratification that follows the onset of the spring bloom. The downward flux can be quantified in terms of the horizontal and vertical gradients of buoyancy and tracer. Evaluation of the scaling estimate over the global oceans shows that eddy-driven subduction following the spring bloom makes a sizable contribution to the export of carbon and oxygen from the high-latitude oceans.
20170227T120000
20170227T130000
54-915
0
PAOC Colloquium – Amala Mahadevan (WHOI)
vt5avemev1nv2u36npr0hkdqg4@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
The Brewer-Dobson circulation, the meridional overturning of mass in the stratosphere, is important for the distribution of gases in the stratosphere, such as ozone and water vapor, which impact surface climate. I will present a theory that relates the ideal tracer "age of air" to this circulation strength. Age can be determined from certain trace gases, and I have applied the theory to obtain the first data-based estimate of the global meridional overturning circulation of the stratosphere. When I compare this to models and reanalysis data, I find substantial disagreement. I will then show how age of air provides enough information to determine the full circulation by deriving a quantitative relationship between the age distribution and the adiabatic component of the circulation.
20170228T150500
20170228T160500
Clark 507
0
Marianna Linz, MIT/WHOI. ‘A theory for calculating the strength of the stratospheric circulation from age’. Clark 507
pjlef2grif27kg8g886drvn09k@google.com
20180502T144721Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Warm-route versus cold-route interbasin exchange in the meridional overturning circulation - Why is the Atlantic saltier than the Pacific?
The interbasin exchange of the meridional overturning circulation (MOC) is studied in an idealized domain with two basins connected by a circumpolar channel in the southernmost region. Gnanadesikan’s (1999) conceptual model for the upper branch of the MOC is extended to include two basins of different widths connected by a re-entrant channel at the southern edge and separated by two continents of different meridional extents. Its analysis illustrates the basic processes of interbasin flow exchange either through the connection at the southern latitude of the long continent (cold route) or through the connection at the southern latitude of the short continent (warm route). A cold-route exchange occurs when the short continent is poleward of the latitude separating the sub-polar and sub-tropical gyre in the southern hemisphere, otherwise there is warm-route exchange. The predictions of the conceptual model are compared to primitive equation computations in a domain with the same idealized geometry forced by wind-stress, surface temperature relaxation and surface salinity flux. A visualization of the horizontal structure of the upper branch of the MOC illustrates the cold and warm routes of interbasin exchange flows. Diagnostics of the primitive equation computations show that the warm-route exchange flow is responsible for a substantial salinification of the basin where sinking occurs. This salinification is larger when the interbasin exchange is via the warm route, and it is more pronounced when the warm-route exchange flows from the wide to the narrow basin.
20170301T120000
20170301T130000
54-915
0
SLS — Paola Cessi (Scripps)
b2thnvnd9joejech1tsch4021g@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
Patterns and consequences of kinship in marine populations
Dr. Cassidy D'Aloia
Postdoctoral Scholar
WHOI Biology Department
Abstract
20170302T120000
20170302T130000
Redfield Auditorium
0
Cassidy D’Aloia
20170303T100000-n91e8qdrst0dg1c0kqh59dudk0@google.com
20180502T144721Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Dust in the Wind: Investigating Past and Present Dust Deposition in the Uinta Mountains, Utah
Eolian delivery of mineral dust impacts soil development, contributes to soil fertility, influences surface water chemistry, and alters snowpack albedo in high mountain ecosystems. This study focuses on past and present deposition of mineral dust in the alpine zone of the Uinta Mountains in northeastern Utah. Alpine soil profiles in the Uintas feature a ubiquitous layer of silt ~20 cm thick, indicating that dust deposition has been a significant long-term process in this environment. Four passive dust collectors were deployed in June, 2011, and an additional four were deployed in October, 2015. These collectors document an average dust flux of ~4 g/m2/yr, similar to values measured from snowpack samples in the Wind River (Wyoming) and San Juan (Colorado) Mountains. XRD analysis reveals that the dust is dominated by quartz, potassium feldspar, plagioclase, and illite. Some samples contain amphibole and chlorite. The dust is very well-sorted, with a median size of 8 μm. Geochemical records from lacustrine sediment cores reveal that the flux and properties of dust arriving in the Uinta Mountains have varied over the post-glacial period, likely in response to regional changes in aridity. A specially designed active sampler deployed at an elevation of 3700 m collects separate samples of NNW and SSE provenance. Differences in grain size distribution, mineralogy, and geochemistry of samples from contrasting wind directions indicate the importance of regional dust sources.
20170303T100000
20170303T110000
Building 54, Room 915
0
COG3 Seminar – Jeff Munroe (Middlebury College)
20170306T120000-8ccmb0ifths3ko79iorelr6vsk@google.com
20180502T144721Z
20170306T120000
20170306T130000
0
Open House
lora794199g0vou53mqqarjl7k@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170307T150500
20170307T160500
0
Jake Gebbie, Irina Rypina and Amala Mahadevan, WHOI. From Circulation to Mixing — Some Vignettes of Physical Oceanography. Clark 201
lmlhi8pt0d9au0c0m4m7tg5ke0@google.com
20180502T144721Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Barotropic turbulence above topography: form stress and eddy saturation
Wind is an important driver of large-scale ocean currents, imparting momentum into the ocean at the sea surface. This force is almost entirely balanced by topographic form stress (that is the correlation of bottom pressure and topographic slope). The direct effect of bottom or skin friction in turbulent boundary layers is almost negligible for the momentum balance. We use a one-layer barotropic model to study the effect of a random monoscale bottom topography on beta-plane geostrophic turbulence. The model forcing is a uniform steady wind stress that produces both a uniform large-scale flow and smaller-scale macroturbulence. The macroturbulence is characterized by both standing and transient eddies and the large-scale flow is retarded by a combination of bottom drag and domain-averaged topographic form stress produced by the standing eddies.
A main control parameter is the ratio of beta to the root mean square gradient of the topographic potential vorticity (PV). We derive asymptotic scaling laws for the strength of the large-scale flow in the limiting cases of weak and strong forcing. If beta is comparable to, or larger than, the topographic PV gradient there is an “eddy saturation” regime in which the large-scale flow is insensitive to large changes in the wind stress. We show that eddy saturation requires strong transient eddies that act effectively as PV diffusion. This diffusion does not decrease the strength of the standing eddies but it does increase the topographic form stress by enhancing the correlation between topographic slope and the standing eddy pressure field.
20170308T120000
20170308T130000
54-915
0
SLS — William Young (Scripps)
03odrjl8abvla790h9pqe6ihbc@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
The Sound of Fury? Drivers of snapping shrimp sound production and their domination
of marine acoustic environments
Dr. Ashlee Lillis
Postdoctoral Scholar
Woods Holde Oceanographic Institution
Abstract
20170309T120000
20170309T130000
0
Dr. Ashlee Lillis
20170310T100000-n91e8qdrst0dg1c0kqh59dudk0@google.com
20180502T144721Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Generation of Arc Crust Requires Oxidation of the Mantle
Continental crust forms uniquely on Earth. High water and oxygen activities lead to the generation of continental crust, but the location, mechanism, and pathway by which oxygen activity increases remains elusive. I¹ll present recent work mapping oxygen activity in space and time during subduction zone initiation in the Western Pacific, a story told by basalts and forearc peridotites.
20170310T100000
20170310T110000
Building E25, Room 119
0
COG3 Seminar – Elizabeth Cottrell (Smithsonian Institution National Museum of Natural History)
a8pluujhk0955eqltsvjq6pob8@google.com
20180502T144721Z
Title: Changes in the statistics of U.S. tornado reports
Abstract: Tornadoes damage property and kill people each year. Recent observational studies have noted changes in the statistics of tornadoes reported in the U.S. While there is believed to have been no changes in the annual number of reliably reported tornadoes, year-to-year variability has increased and more tornadoes are occurring in clusters (outbreaks). A natural question is whether a changing climate might be responsible for these trends. The length, variability and quality of the U.S. tornado record make answering that question difficult. An alternative approach is to examine large-scale meteorological features such as vertical wind shear and convective available potential energy that are associated with increased likelihood of severe thunderstorm activity. These associations can be summarized in indices which are functions of the local environment and whose values indicate the likelihood of severe thunderstorms. Here we compare variability in tornado reports to observed changes in meteorological environments, as well as those expected under climate change.
20170313T120000
20170313T130000
Ida Green Lounge (9th Floor), Building 54, MIT, Cambridge, MA, United States
0
PAOC Colloquium: Prof. Michael Tippett (Columbia University)
390i4j6i57kb0bgdtfr5hhp1sk@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
**SPECIAL BIOSEMINAR**
Long Term Shift in Cod Phenology Linked to Water Clarity and Delayed Spring Bloom Onset
Dr. Anders Frugård Opdal
Postdoctoral Researcher
University of Bergen, Norway
Abstract
20170314T140000
20170314T160000
Redfield Auditorium
0
Dr. Anders Frugård Opdal – cancelled
di3t8ip1keifimq60bi5cjnl2s@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170314T150500
20170314T160500
Clark 507
0
Bernadette Sloyan, CSIRO. ‘Sustained Ocean Observations: the role of the OOPC (Ocean Observations Physics and Climate panel)’. Clark 507
282jnfvshnuoiapnbkcm8bf17g@google.com
20180502T144721Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Southern Ocean eddies: generation, propagation and decay
The Southern Ocean has high concentrations of eddy kinetic energy, but analysis of altimeter data and an ocean state estimate show that the generation of relatively large amplitude eddies is not a ubiquitous feature of the Southern Ocean but rather a phenomenon that is constrained to isolated, well-defined regions. Five “hotspots” of high probability of eddy generation are identified using altimeter data. These hotspots are located downstream of major topographic features, with their boundaries closely following f/H contours. Eddies generated in these locations do not propagate far but decay within the boundaries of the generation area. The anisotropy of the dispersion of eddy tracks in geographical coordinates versus a rotated coordinates system aligned with f/H contours, shows that eddies tend to follow f/H contours rather than f. Maps of buoyancy and shear production terms computed from a state estimation model show enhanced values of both conversion terms inside the hotspots, with buoyancy production two orders of magnitude larger than shear production. The mean potential density field estimated from Argo floats shows that inside the hotspots isopycnal slopes are steep, indicating availability of potential energy and providing further evidence of the main generation mechanism. The hotspots identified in this paper overlap with previously identified regions of standing meanders. We hypothesize that hotspot locations can be explained by the combined effect of topographic features, standing meanders which enhanced baroclinic instability and availability of potential energy to generate eddies via baroclinic instabilities.
20170315T120000
20170315T130000
0
SLS — Uriel Zajaczkovski (Scripps)
5ejrbo74o0qejme6sc4vhqf0sc@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
Water and War: Hydropolitics in the Middle East
Dr. Darlene Ketten
Assistant Clinical Professor, Harvard Medical School
Senior Research Scientist, Boston University
Designated Expert, Environment-Science-
Technology-Health, U.S. Department of State
Bureau of Near Eastern Affairs/Iraq (NEA/I/ECON/ESTH)
Abstract
20170316T120000
20170316T130000
Redfield Auditorium
0
Dr. Darlene Ketten
20170317T100000-n91e8qdrst0dg1c0kqh59dudk0@google.com
20180502T144721Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Seeing Through the Haze: Using Sulfur-Isotope Systematics to Probe the Composition of Earth's Early Atmosphere
Reconstructing the evolution of atmospheric chemistry has long been the focus of geochemical research; however, the utility of our geochemical toolbox is rarely without inference. Introducing quadruple S-isotope systematics, we’ll take a ramble through the Archean sulfur-isotope record and take a glimpse at the evolution of our atmosphere. Focusing on newer, high-resolution, approaches I will present recent and [maybe] emerging data that constrains the first irreversible rise in atmospheric oxygen—The Great Oxidation Event—as well as a mechanism that may have expedited the accumulation of oxygen and the biological innovations that followed.
20170317T100000
20170317T110000
Building E25, Room 119
0
COG3 Seminar – Gareth Izon (MIT)
1rortkmnnqldlfr3ep8prjv5i8@google.com
20180502T144721Z
Title: Why does climate sensitivity go up as ocean heat uptake declines? A linear systems perspective.
Transient climate sensitivity tends to increase on multiple timescales in climate models subject to an abrupt CO2 increase, which suggests that:
(1) we may be systematically underestimating equilibrium sensitivity
in the models, and
(2) constraining equilibrium sensitivity from observations is a
tricky business at best.
I will argue that the radiative feedback and ocean heat uptake processes governing transient sensitivity are intimately connected. Idealized GCM experiments show that the global climatic impact of spatially localized ocean heat uptake patterns are very sensitive to their geographical distribution. I will discuss these results in terms of the efficacy concept and a linear systems perspective in which responses to individual climate forcing agents are additive. Heat uptake can be treated as a slowly varying forcing on the atmosphere and surface, whose efficacy is strongly determined by its spatial pattern. An illustrative linear model demonstrates the emergence of increasing climate sensitivity as a simple consequence of the slow decay of high-efficacy sub-polar heat uptake. Shortwave cloud feedbacks are a key player in this increasing climate sensitivity, both in idealized and CMIP5-type models. I propose a causal physical mechanism linking sub-polar heat uptake to a global-scale increase in lower-tropospheric stability.
20170320T120000
20170320T130000
0
PAOC Colloquium: Brian Rose, U Albany
oma9kf030v4ftord9je507b98o@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170321T150500
20170321T160500
Clark 507
0
Cancelled
n78gmna67inb2gblveqfug4cng@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
Disentangling bottom-up and top-down effects on
Calanus dynamics in high latitude systems
Dr. Kristina Kvile
Postdoctoral Scholar
Biology Department, WHOI
Abstract
20170323T120000
20170323T130000
Redfield Auditorium
0
Dr. Kristina Kvile
20170324T100000-n91e8qdrst0dg1c0kqh59dudk0@google.com
20180502T144721Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Cave records from Southeast Asia: Windows to past hydroclimate variability
Despite significant advances in our understanding of tropical Australasian monsoon climate variability over the past decade(s), we still know very little about the range and mechanisms of rainfall variability in Southeast Asia on orbital (~100,000-year) to millennial (~1000-year) timescales. As a result, state-of-the-art general circulation models have little data with which to validate simulations of past climate, thereby placing much uncertainty on future projections of monsoon variability. Given the large population of SE Asia who rely on the monsoon rains for agriculture and economic development, it is critical that we gain a better understanding on the factors that influence the monsoon climate. Over the past decade, my
colleagues and I have explored a host of cave systems in remote regions of SE Asia installing data-loggers and collecting stalagmites, with the overarching goals being to: i) better constrain modern processes controlling speleothem growth, and in particular, how they preserve above-cave climate changes; and ii) to build high-resolution and long records of past monsoon behavior from the geochemical signals preserved in these deposits. In this talk, I will discuss the utility of speleothems to accurately preserve past changes in regional SE Asian hydroclimate, and their strong potential in addressing current uncertainties in tropical climate variability over a range of timescales (i.e. glacial-interglacial to millennial), particularly with respect to how the Asian monsoon responded to past changes in Earth’s boundary conditions.
20170324T100000
20170324T110000
Building E25, Room 119
0
COG3 Seminar – Michael Griffiths (William Paterson University)
ff3a92mf45iu10cje3af9r9mqo@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170328T150500
20170328T160500
Clark 507
0
Sylvia Cole, WHOI. ‘Momentum transfer in the Arctic marginal ice zone’. Clark 507
a367u2sbk5rv6slo58dc5no8j0@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
20170330T120000
20170330T130000
Redfiled Auditorium
0
No Biology Seminar
ai1ec-824612@oceans.mit.edu
20180502T144721Z
Special Events
http://www.neaq.org/learn/lectures/upcoming-lectures/
Speakers:
Robert Vincent, Ph.D., Massachusetts Institute of Technology, Sea Grant College Program
Rose M. Martin, Ph.D., Oak Ridge Institute for Science and Education, Postdoctoral Researcher at EPA Atlantic Ecology Division
The MIT Sea Grant College Program and the U.S. Environmental Protection Agency have been working with the National Park Service to study carbon cycling in coastal dune habitats, as well as the effects of historic peat deposits on the establishment and persistence of invasive plants (Phragmites australis). With the increased risk of erosion from coastal storms exposing the once-buried peat deposits, and the challenge of controlling an aggressive invasive species, this dynamic system faces an uncertain future. The research findings from this study will inform future conservation efforts in the region as well as provide a deeper understanding of carbon cycling in coastal dunes.
Information here. Registration is required.
Tickets: http://support.neaq.org/site/Calendar?id=107028&view=Detail.
20170330T190000
20170330T210000
+42.359131;-71.049581
Simons IMAX Theatre @ 1 Central Wharf, Boston, MA 02110, USA
0
New England Aquarium Lecture: Invasive Species and Carbon Cycling in Coastal Dunes of Cape Cod
external
thumbnail;http://oceans.mit.edu/wp-content/uploads/2017/03/Screen-Shot-2017-03-15-at-2.35.23-PM-150x150.png;150;150;1,medium;http://oceans.mit.edu/wp-content/uploads/2017/03/Screen-Shot-2017-03-15-at-2.35.23-PM-300x300.png;300;300;1,large;http://oceans.mit.edu/wp-content/uploads/2017/03/Screen-Shot-2017-03-15-at-2.35.23-PM.png;604;606;,full;http://oceans.mit.edu/wp-content/uploads/2017/03/Screen-Shot-2017-03-15-at-2.35.23-PM.png;794;796;
lecture,new england aquarium
http://support.neaq.org/site/Calendar?id=107028&view=Detail
20170331T100000-n91e8qdrst0dg1c0kqh59dudk0@google.com
20180502T144721Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20170331T100000
20170331T110000
Building E25, Room 119
0
No COG3 Seminar – Spring Break
57hjisf2ast4n5lo5fa2tplfmg@google.com
20180502T144721Z
Title: Monsoon circulations and tropical heterogeneous chlorine chemistry in the stratosphere
Abstract: This seminar presents novel findings that expand the range of latitudes over which heterogeneous chemistry operates in the stratosphere. It has long been thought that heterogeneous chlorine chemistry would only be important in the Antarctic and Arctic. Our new work shows that tropical heterogeneous chemistry is also important. Transport processes associated with the summer monsoons bring increased abundances of hydrochloric acid into contact with liquid sulfate aerosols in the cold tropical lowermost stratosphere, leading to heterogeneous chemical activation of chlorine species. The calculations indicate that the spatial and seasonal distributions of chlorine monoxide and chlorine nitrate near the monsoon regions of the northern hemisphere tropical and subtropical lowermost stratosphere could provide indicators of heterogeneous chlorine processing. In the model, these processes impact the local ozone budget and decrease ozone abundances, implying a chemical contribution to longer-term northern tropical ozone profile changes at 16-19 km.
20170403T120000
20170403T130000
Ida Green Lounge (9th Floor), Building 54, Cambridge, MA, United States
0
PAOC Colloquium – Susan Solomon (MIT)
9h0jovectfkaab2napoa62gnkk@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170404T150500
20170404T160500
Clark 507
0
Joseph LaCasce, University of Oslo. ‘The vertical structure of Rossby waves’. Clark 507
gva7pvgq40gn82og8h8hrmoqug@google.com
20180502T144721Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
High-resolution observations of internal wave induced turbulence in the deep ocean
An overview is presented of high-resolution temperature observations above underwater topography in the deep, generally stably stratified ocean. The Eulerian mooring technique is used to monitor temperature variations by typically 100 sensors distributed over lines between 40 and 400 m long. The independent sensors sample at a rate of 1 Hz for up to one year with a precision better than 0.1 mK. This precision and sampling rate are sufficient to resolve the large, energy containing turbulent eddies and all of the internal waves and their breaking above underwater topography. Such underwater wave breaking is the key mechanism for the redistribution of nutrients and heat (to maintain the ocean stably stratified), and the resuspension of sediment.
Under conditions of tight temperature-density relationship, the temperature data are used to quantify turbulent overturns. These observations show two distinctive turbulence processes that are associated with different phases of a large-scale, mainly tidal, internal gravity wave: i) highly nonlinear turbulent bores during the upslope propagating phase, and ii) Kelvin-Helmholtz billows, at some distance above the slope, during the downslope phase. While the former may be associated in part with convective turbulent overturning following Rayleigh-Taylor instabilities, the latter are mainly related to shear-induced instabilities. Under weaker stratified conditions, away from boundaries, free convective mixing appears more often, but a clear inertial subrange in temperature spectra is indicative of dominant shear-induced turbulence. With stratification, turbulence is seen to increase in dissipation rate and diffusivity all the way to the bottom, which challenges the idea of a homogeneous bottom boundary layer. With a newly developed five-lines mooring, the transition from isotropy (full turbulence) to anisotropy (stratified turbulence/internal waves) is revealed.
20170405T120000
20170405T130000
54-915
0
SLS — Hans van Haren (NIOZ)
tot9eichmksah1fe1rdk1hha2c@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
Microbiology of the anoxic pelagic ocean: emerging insights from contemporary oxygen minimum zones
Dr. Frank Stewart
Georgia Institute of Technology
Abstract
20170406T120000
20170406T130000
Redfield Auditorium
0
Dr. Frank Stewart
20170407T100000-n91e8qdrst0dg1c0kqh59dudk0@google.com
20180502T144721Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Biostratigraphy and Glaciations in the Neoproterozoic: Updates from Re-Os geochronology
Sedimentary strata from the Neoproterozoic Era (1000-541 Ma) host evidence for widespread glaciations, major fluctuations in geochemical proxy records, and numerous biological innovations associated with the diversification of eukaryotes that culminated with the emergence of Metazoans. Understanding the drivers and rates of change through this critical transition has been limited by the lack of a robust chronology. Here I will present multiple new Re-Os and U-Pb geochronology data from Neoproterozoic strata in an attempt to refine global correlation schemes and further constrain this critical interval of Earth history.
20170407T100000
20170407T110000
Building E25, Room 119
0
COG3 Seminar – Alan Rooney (Yale)
ps62uqj5u3l3rd2j279gq5shvc@google.com
20180502T144721Z
Title: Can we finally balance the marine nitrogen budget?
Abstract: The marine fixed nitrogen budget is widely thought to be out of balance, losing enough bio-available nitrogen that the oceans would be devoid of life within 3,000 years. But is such a apocalyptic scenario realistic? Surely not. This talk will present nuances of the cycling of marine nitrogen, expanding specifically on the anaerobic metabolisms within the oxygen deficient “shadow” zones of the ocean. I’ll present a hypothesis for attempting to balance the nitrogen budget calculation by incorporation of a novel but potentially significant pathway: anaerobic nitrite oxidation. This metabolism would further help resolve another long-standing debate among the nitrogen community, i.e., the respective roles of anammox and denitrification in regulating fixed nitrogen loss. In all, a lunchtime full of nitrogen is to be expected.
20170410T120000
20170410T130000
Ida Green Lounge (9th Floor), Building 54, Cambridge, MA, United States
0
PAOC Colloquium: Andrew Babbin, EAPS MIT
89gv4i0rhdeo0bse4sf5f2elmg@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170411T150500
20170411T160500
Clark 507
0
Thomas Kilpatrick, SIO. ‘Satellite observations of convection–wind coupling’. Clark 507
herj10d2s4ks4mlk4tl3p2i95o@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
Multi-scale physical-biological interactions with harmful algal populations
Dr. Lourdes Velo-Suárez
Laboratoire de Microbiologie des Environnements Extrêmes, CNRS (French National Center for Scientific Research)
Abstract
20170413T120000
20170413T130000
Redfield Auditorium
0
Dr. Lourdes Velo-Suárez
20170414T100000-n91e8qdrst0dg1c0kqh59dudk0@google.com
20180502T144721Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
The What, When, Where, and Why of Supereruptions
Supereruptions are gigantic volcanic eruptions (�450 km^3 of magma) the likes of which we have never witnessed. Yet, this does not mean that we will never experience one. Such
enormous eruptions have the potential to wreak havoc on life, infrastructure, travel, and the
environment. Consequently, it is critical that we study past supereruptions to understand how, when, where, and why one might happen in the future. In addition, supereruption deposits are evidence that large volumes of magma existed in the crust multiple times in Earth’s history; thus, studying these systems can inform on the magmatic construction of Earth’s crust.
In this talk, I will address several outstanding and strongly debated questions regarding
supereruptive systems: Where in the crust do these magmas reside? What shape do they take? How long do they persist in the crust before erupting? When, why, and over what timescales does the eruptive process occur? How are the giant volumes of crystal-poor high-silica rhyolite magma involved in supereruptions generated? Answering these questions is important both for practical reasons (e.g., hazards preparation and mitigation) and intellectual ones (e.g., understanding crustal processes).
To address these questions, I combine information from multiple scales and perspectives (field studies, geochemistry, textural relations of crystals in rocks and melt inclusions in crystals, geochronology, geobarometry, phase-equilibria modeling, and diffusion modeling). Results from this work suggest that we can make some broad generalizations about supereruptive systems, but these systems have notable variability as well (e.g., their shape in the crust). This work also illustrates the power in using a multi-faceted, multi-disciplinary approach to addressing questions in the Earth Sciences.
20170414T100000
20170414T110000
Building E25, Room 119
0
COG3 Seminar – Ayla Pamucku (Princeton)
gqmj288uuud086l5qkrkenescs@google.com
20180502T144721Z
20170417T120000
20170417T130000
0
Patriots day vacation: No PAOC Colloquium
j6njfjc73iuk9abfq9qde001tg@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170418T150500
20170418T160500
Clark 507
0
Allan Clarke, FSU. ‘On the relationship of near-surface flow, Stokes drift and wind stress’. Clark 507
asmkr42urnv29bn7kehvf58q8s@google.com
20180502T144721Z
MIT Seminar | PAOC Oceanography and Climate Sack Lunch
Modeling iceberg drift and decay in modern and glacial climates
Under global warming, the calving of icebergs into the polar oceans is expected to increase. As a result, the role that icebergs play in Earth's climate system has received a recent surge of interest, and efforts are underway to explicitly represent icebergs in GCMs. A better understanding of how icebergs drift and decay will help facilitate an accurate representation of icebergs and guide the interpretation of GCM results. In this talk I will present an idealized analytical model that we developed to aid this effort. I will use the model to address (i) which climate model variables are most important to accurately model iceberg evolution and (ii) whether climate models do a good job simulating these variables. I then will turn to episodes of massive iceberg discharge, called Heinrich Events, which occurred during the last glacial period. These events are believed to have had large-scale impacts on the global climate system. However, modeling icebergs that lived and melted more than 10,000 years ago comes with its own challenges, as we will see.
20170419T120000
20170419T130000
54-915
0
SLS — Till Wagner (Scripps)
5b6evueqgene0f1j1g65v0ti9s@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
New Paradigms in Microbial Sulfur Metabolism
Dr. Karthik Anantharaman
Postdoctoral Scholar
University of California, Berkeley
Abstract
20170420T120000
20170420T130000
Redfield Auditorium
0
Dr. Khartik Anantharaman
20170421T100000-n91e8qdrst0dg1c0kqh59dudk0@google.com
20180502T144721Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
The role of grain size on the seismic structure of the oceanic upper mantle and melt migration beneath midocean ridges
Grain size is a key microstructural property of the Earth's mantle, because it influences rheology, deformation mode (e.g., diffusion vs. dislocation creep), seismic attenuation and wave-speeds, electrical conductivity, and the permeability of the mantle to melt migration. In
this talk I will discuss models for grain size evolution in the oceanic upper that combine composite grain-size dependent rheology with the Wattmeter [Austin & Evans, 2007] model for how grain size changes in response to the evolving deformation field. These results will be interpreted in the context of the seismic low velocity zone beneath the ocean basins and the origin of the lithosphere asthenosphere boundary. Finally, I will discuss the implications of grain size variability on the patterns of melt migration beneath mid-ocean ridges and subduction zones and show the results of preliminary two-phase flow models that couple melt migration with the predicted grain-size field.
20170421T100000
20170421T110000
Building E25, Room 119
0
COG3 Seminar – Mark Behn (WHOI)
t046l603eq5d44tkp0v760gue8@google.com
20180502T144721Z
A new perspective on an old problem: understanding the observed variability of the South Asian monsoon
Recent theoretical advances indicate that the South Asian monsoon (SAM) should be viewed as an energetically-direct cross-equatorial Hadley circulation, with the monsoonal precipitation primarily occurring in its ascending branch, rather than as a large land-sea breeze circulation. In this talk, we explore the implications of these emerging theories for the observed variability of the SAM on seasonal and longer time scales. We start by using the atmospheric moisture budget to introduce a novel objective index for the onset and retreat of the SAM, which robustly captures the expected seasonal transitions in precipitation and winds and eliminates the need for arbitrarily selected thresholds. Using this index, we show how the SAM onset and retreat are associated with a coherent set of seasonal transitions in circulation, jet streams, precipitation, energetics, and momentum balance throughout the SAM sector. We also use the atmospheric moisture budget to define a new index for the SAM strength on interannual time scales. We show that interannual variability in SAM net precipitation is primarily caused by variations in winds rather than variations in humidity, and that strong monsoons are associated with a northward expansion of the overturning circulation and a decreased near-surface land-sea thermal contrast, in disagreement with the traditional view of the SAM as a sea-breeze circulation. We also find teleconnections between SAM strength and temperatures, winds, and momentum and energy transports in the southern hemisphere extra tropics, which suggest new directions for future research to improve our understanding of the mechanisms involved in SAM variability.
20170424T120000
20170424T130000
54-915
0
PAOC Colloquium: Simona Bordoni (Caltech)
dcvaefdedl9v3knqs5dl1celbo@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
The Intertropical Convergence Zone (ITCZ), also known as the doldrums, is the area just north of the equator where the northeast and southeast trade winds converge. We discuss the role of the ocean in pushing the ITCZ northwards away from the equator and in modulating its meridional migrations.
20170425T150500
20170425T160500
Clark 507
0
John Marshall, MIT. ‘Inter-hemispheric asymmetries in climate: Oceans and the Inter-tropical Convergence Zone’. Clark 507
20170428T100000-n91e8qdrst0dg1c0kqh59dudk0@google.com
20180502T144721Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Why magma stall in the Earth’s crust?
The emplacement depth of magmas plays a key role in determining the chemical stratification of the crust, and on the probability of magma to reach the surface to
feed volcanic eruptions. While mechanical discontinuities within the crust have been shown to lead to the arrest of propagating dykes, in a section of a volcanic island arc in Kohistan, the depth of emplacement of granitoids does not seem to correspond to any particular mechanical discontinuity. I will focus on the evolution of crystallinity and temperature as function of magma chemistry and depth to show how magma chemistry can strongly affect the depth at which magma stall in the crust to form magma reservoirs.
20170427T100000
20170427T110000
Building 54, Room 915
0
COG3 Seminar – Luca Caricchi (University of Geneva)
2umjefanmpiuh12g27hfr4acp4@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
The dark side of the ocean: understanding the microbiome of the ocean’s aphotic realm
Dr. Maria Pachiadaki
Bigelow Laboratory for Ocean Sciences
Abstract
20170427T120000
20170427T130000
Redfield Auditorium
0
Dr. Maria Pachiadaki
4m78i0hvt3vuqsl9qd3hqonuhk@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
Novel insights into harmful algal bloom ecology through deployments of robotic in situ biosensors
Dr. Michael L. Brosnahan
Visiting Investigator, Biology Department
Woods Hole Oceanographic Institution
Abstract
20170501T120000
20170501T130000
Redfield Auditorium
0
Dr. Michael L. Brosnahan
20170502T150500-02mm6q7uplh244fa4f7at8slfk_R20170502T190500@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170502T150500
20170502T160500
Clark 507
0
Jack Whitehead, WHOI. ‘Dimensions of continents and oceans – water has carved a perfect cistern’. Clark 507
02mm6q7uplh244fa4f7at8slfk@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170502T150500
20170502T160500
Clark 507
FREQ=WEEKLY;UNTIL=20170502T190459Z;BYDAY=TU
0
OPEN
02mm6q7uplh244fa4f7at8slfk_R20170502T190500@google.com
20180502T144721Z
WHOI Seminar | Physical Oceanography
20170502T150500
20170502T160500
20170502T150500
20170509T150500
20170516T150500
Clark 507
FREQ=WEEKLY;UNTIL=20170530T190459Z;BYDAY=TU
0
Reserved.
vulj98h6p78vouutf2ol16b9uk@google.com
20180502T144721Z
WHOI Seminar | Biological Oceanography
20170504T120000
20170504T130000
0
No Bioseminar Today
20170505T100000-n91e8qdrst0dg1c0kqh59dudk0@google.com
20180502T144722Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20170505T100000
20170505T110000
Building E25, Room 119
0
COG3 Seminar – No Seminar
20170509T150500-02mm6q7uplh244fa4f7at8slfk_R20170502T190500@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
20170509T150500
20170509T160500
Clark 507
0
Viviane Menezes, WHOI. ‘Air-Sea Interaction, Water Mass Formation and Ocean Circulation — From warm-salty (Red Sea) to cold-fresh waters (Southern Ocean)’. Clark 507
36u65tqgprfiaungp82o6bngjs@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
Collective phenomena in living matter - a case study on emperor penguins
Dr. Daniel Zitterbart
Postdoctoral Scholar
Applied Ocean Physics & Engineering
Woods Hole Oceanographic Institution
Abstract
20170511T121500
20170511T131500
Redfield Auditorium
0
Dr. Daniel Zitterbart
20170512T100000-n91e8qdrst0dg1c0kqh59dudk0@google.com
20180502T144722Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
Identifying Traces of Primitive Life in Ancient Rocks
The early life fossil record is based upon a limited
number of often controversial graphitic microfossils.
The main complication resides in the poor
preservation of organic biosignatures in the
(meta)sedimentary rock record. Biodegradation and
fossilization processes, as well as the increase of
temperature and pressure conditions during
diagenesis and metamorphism inevitably alter the
original biochemical signatures of organic molecules.
Thus, at a certain stage, biogenic and abiotic organics
may become very difficult to distinguish.
During this talk, I will show how combining
characterization of natural samples using advanced
spectroscopic techniques (STXM-based XANES &
Raman microspectroscopies) and simulation of
fossilization processes in the laboratory sheds new
light on the potential preservation of microorganism
molecular biosignatures in ancient rocks.
20170512T100000
20170512T110000
Building E25, Room 119
0
COG3 Seminar – Julien Alleon (MIT)
o78sv9b1rrjbpf94egm1pvc3d4@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
Ms. Alexis Fischer
Ph.D. Candidate, WHOI Biology Department
Dissertation Defense
20170512T133000
20170512T143000
Redfield Auditorium
0
Ms. Alexis Fischer
gvl9cjpdltk6bgnu6rnhjbeqng@google.com
20180502T144722Z
Title: Western Boundary Currents in a Changing Climate
Abstract: Western boundary currents—such as the Agulhas Current in the Indian Ocean—carry heat poleward, moderating Earth’s climate and fuelling the mid-latitude storm tracks. They could exacerbate or mitigate warming and extreme weather events in the future, depending on their response to anthropogenic climate change. Climate models show an ongoing poleward expansion and intensification of the global wind systems, most robustly in the Southern Hemisphere, and linear dynamical theory suggests that western boundary currents will intensify and shift poleward as a result. Observational evidence of such changes comes from accelerated warming and air–sea heat flux rates within all western boundary currents, which are two or three times faster than global mean rates. Here we show that, despite these expectations, the Agulhas Current has not intensified since the early 1990s. Instead, we find that it has broadened as a result of more eddy activity. Recent analyses of other western boundary currents—the Kuroshio and East Australia currents—hint at similar trends. These results indicate that intensifying winds may be increasing the eddy kinetic energy of boundary currents, rather than their mean flow. This could act to decrease poleward heat transport while increasing cross-frontal exchange of heat (and nutrients and pollutants) between the coastal ocean and the deep ocean. Sustained in situ measurements are needed to properly understand the role of these current systems in a changing climate.
20170515T120000
20170515T130000
54-915
0
PAOC Colloquium: Lisa Beal (RSMAS: U Miami)
flstovv4lnrvgo4mdv6gd931qg@google.com
20180502T144722Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
The origin of the eukaryote cell
Eukaryotes have a fundamentally different cell
structure from bacteria and archaea, and possibly
evolved from the latter. This possibility: an archaeal
origin of eukaryotes has been a bit of a distraction in
that it has led to models that try and explain
eukaryote origins from modern archaea lacking any
eukaryotic features. In this talk I will summarise what
we know about eukaryote origins, and argue that
ways of thinking now more common in
palaeontology can help us to understand eukaryote
origins. By focusing on known biological processes,
and ecological drivers, key events in the origin of
eukaryotes can be understood without needing to
appeal to special or rare events.
20170516T100000
20170516T110000
Building 54, Room 915
0
COG3 Seminar – Anthony Poole (The University of Auckland)
20170516T150500-02mm6q7uplh244fa4f7at8slfk_R20170502T190500@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
20170516T150500
20170516T160500
Clark 507
0
Robert Todd, WHOI. ‘New views of the Gulf Stream’. Clark 507
fk5ja28aab6c21d6k2igk755nk@google.com
20180502T144722Z
MIT Seminar | PAOC Chemical Oceanography and Biogeochemistry
20170518T100000
20170518T110000
Building 54, Room 915
0
COG3 Seminar – Cathy Busby (UCSB)
omn3uftf5itvjiuth72obmn2s4@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
Avenues of coral acclimatization in response to rapid environmental change
Dr. Hollie M. Putnam
Assistant Professor
Department of Biological Sciences
University of Rhode Island
Abstract
20170518T120000
20170518T130000
Redfield Auditorium
0
Dr. Hollie M. Putnam
tppvk273p2r05lu0r0cm8ogbl4@google.com
20180502T144722Z
Role of Seasonal Transitions and the Westerlies on the Rainfall Climate of East Asia
The East Asian Summer Monsoon is unique amongst summer monsoonal systems in in northward extent as well as in its complex seasonality, exhibiting dynamically distinct rainfall stages and abrupt transitions between them. Previous studies have alluded to the seasonally-varying downstream influence of the westerlies flowing around the Tibetan Plateau as central to the rainfall seasonality. I propose a hypothesis that the East Asian summer rainfall variability and change arise through modulation in the meridional position of the westerlies impinging on the Plateau, which in turn altered the timing and duration of its seasonal transitions. The viability of this hypothesis is demonstrated through examples from observed modern-day variability and from paleoclimatic changes. I will end with a discussion on the basic ingredients controlling East Asian summer monsoon seasonality.
20170522T120000
20170522T130000
0
PAOC Colloquium: John Chiang, UC Berkeley
20170523T150500-02mm6q7uplh244fa4f7at8slfk_R20170502T190500@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
20170523T150500
20170523T160500
Clark 507
0
Nick Beaird, WHOI. ‘Production, Export, and Oceanic Impacts of Greenland’s glacial meltwater’. Clark 201
01cvc1g9jpi15sm2e4kup01gmc@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
Pint of Science
Dr. Stephanie Jenouvrier
Associate Scientist, WHOI Biology Department
Influence of dispersal processes on the global dynamics of the Emperor penguin, a species threatened by climate change
Dr. Carin Ashjian
Senior Scientist, WHOI Biology Department
Mesozooplankton are not herbivores: the importance of microzooplankton in mesozooplankton diets
Abstract
20170525T153000
20170525T163000
Redfield Auditorium
0
Pint of Science
s2q2or0gn8g18vb04ugd3hu2c8@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
Dante’s 9th Circle of Hell is Ice (a fact that is not unrelated to the study of light and algae in polar ocean ecosystems)
Dr. Samuel R. Laney
Associate Scientist
WHOI Biology Department
Abstract
20170530T120000
20170530T130000
Redfield Auditorium
0
Dr. Samuel R. Laney
02mm6q7uplh244fa4f7at8slfk_R20170530T190500@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
20170530T150500
20170530T160500
20170613T150500
20170627T150500
20170704T150500
20170711T150500
20171226T150500
Clark 507
FREQ=WEEKLY;UNTIL=20171226T200500Z;BYDAY=TU
0
OPEN
20170530T150500-02mm6q7uplh244fa4f7at8slfk_R20170530T190500@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
20170530T150500
20170530T160500
Clark 507
0
Ruth Musgrave, MIT. ‘ The generation of Rossby waves and wake eddies by small islands’. Clark 507
tm94g0t9lu61us095noc5f534g@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
A statistical problem concerning the
historical Jesus
Dr. Andrew Solow
Senior Scientist and Director
Marine Policy Center, WHOI
Abstract
20170601T120000
20170601T130000
Redfield Auditorium
0
Dr. Andrew Solow
20170606T150500-02mm6q7uplh244fa4f7at8slfk_R20170530T190500@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
20170606T150500
20170606T160500
Clark 507
0
Christopher Piecuch, AER. ‘A Bayesian Perspective on Recent Mean Sea Level Changes along the United States East Coast’. Clark 507
bbulb7tajailsp5rpcel7qqetk@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
Coastal pollution, next-generation sequencing,
and the evolution of marine populations
Dr. Jon Puritz
Postdoctoral Research Associate
Northeastern University
Abstract
20170608T120000
20170608T130000
Redfield Auditorium
0
Dr. Jon Puritz
0o6l8uh32k8iu2p22cd5ggjhks@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
I will demonstrate the tools that allow to perform analytic, i.e. mathematically rigorous, proofs of chaos in various models. This includes the proof of the birth of the Lorenz attractor in the Lorenz model. In future, the further development of such tools and criteria will be very useful for the study of applied problems.
20170608T140500
20170608T150500
Clark 201
0
Ivan Ovsyannikov, U. Bremen. ‘Analytic proof of chaotic regimes in dynamical models’. Clark 271
bminvuuk1b0rka91ashk6g2lu4@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
Making MSE algorithms 'user friendly' - the a4a standard MSE
Ernesto Jardim, Finlay Scott and Iago Mosqueira
European Commission Joint Research Centre, Ispra, Italy
Abstract
**Sponsored by NMFS/NEFSC, CINAR, and WHOI Biology Department**
20170612T100000
20170612T110000
Redfield Auditorium
0
Ernesto Jardim, Finlay Scott and Iago Mosqueira
iefqf67ftj7cgfcdjlu9ueutu8@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
Paulik revisited: Statistical framework and estimation performance of multistage recruitment functions
Liz Brooks
Northeast Fisheries Science Center, NOAA, Woods Hole, MA
Abstract
**Sponsored by NMFS/NEFSC, CINAR, and WHOI Biology Department**
20170613T100000
20170613T110000
Redfield Auditorium
0
Liz Brooks
ekep1sp13fpgdbgt2q6a6t0r60@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
Causal Drivers of Barents Sea Capelin Population Dynamics on Different Time Scales
Sam Subbey
Institute of Marine Research, Bergen, Norway
Abstract
**Sponsored by NMFS/NEFSC, CINAR, and WHOI Biology Department**
20170613T133000
20170613T143000
Redfield Auditorium
0
Sam Subbey
20170613T150500-02mm6q7uplh244fa4f7at8slfk_R20170530T190500@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
20170613T150500
20170613T160500
Clark 201
0
Georgy Manucharyan, CalTech. ‘The role of mesoscale eddies in the Ekman-driven variability of the Beaufort Gyre’. Clark 201
1496843675295@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
Process studies to quantify ecosystem dynamics in the California Current
Brian Wells
Southwest Fisheries Science Center, NOAA, Santa Cruz, California
Abstract
**Sponsored by NMFS/NEFSC. CINAR, and WHOI Biology Department**
20170614T120000
20170614T130000
Redfield Auditorium
0
Brian Wells
nqstnj8au5ru9f33enq8q3o9to@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
Ecology and evolution of Prochlorococcusviewed through the lens of marine nitrogen cycling
Dr. Paul M. Berube
Research Scientist
Massachusetts Institute of Technology
Abstract
20170615T120000
20170615T130000
Redfield Auditorium
0
Dr. Paul M. Berube
20170620T150500-02mm6q7uplh244fa4f7at8slfk_R20170530T190500@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
Observations show that the upper ocean has been warming since the 1970s, and it is usually attributed to global warming that is associated with the increasing concentration of greenhouse gases in the atmosphere. The global ocean is implicitly considered as a passive heat reservoir, and it is assumed that the ocean was in equilibrium with the atmosphere before the anthropogenic global warming had occurred. However, the global ocean is a dynamically active heat exchanger involving processes of various temporal and spatial scales and has a memory of thousands of years. Not only the heat exchange between ocean and atmosphere but the vertical heat flux passing the lower face of the upper ocean contribute to the changes in the observed upper ocean heat content. In this talk, I will present the mean and the bidecadal change of the ocean vertical heat flux as well as the related physical processes from a dynamically consistent and data-constrained ocean state estimate - ECCO (Estimating the Circulation & Climate of the Ocean). Implications of the vertical redistribution of ocean heat on the changes of the upper and deep ocean heat contents, particularly the recently much-debated global warming "hiatus", will also be discussed.
20170620T150500
20170620T160500
Clark 507
0
Xinfeng Liang, U. South Florida. ‘Vertical Redistribution of the Global Oceanic Heat Content’. Clark 507
imq5slu016d692hdj362g90ih8@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
Integrating multiple techniques to study pinniped diets: a tale of two species
Mr. Keith M. Hernandez
Graduate Student
Dept. of Oceanography & Coastal Sciences
Louisiana State University
Abstract
20170621T120000
20170621T130000
Redfield Auditorium
0
Mr. Keith M. Hernandez
k48kjln2o9ea2n54b18jrvcrj8@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
Model systems for marine mixotrophs: bridging lab, field, and theory
Dr. Matthew Johnson
Associate Scientist
WHOI Biology Department
Abstract
20170622T120000
20170622T130000
0
Dr. Matthew Johnson
20170627T150500-02mm6q7uplh244fa4f7at8slfk_R20170530T190500@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
20170627T150500
20170627T160500
Clark 507
0
Alison Macdonald, WHOI. ‘A 2011-2015 Fukushima Tracer Perspective on North Pacific Mode Water Circulation’. Clark 507
s1f4qds90mgc2focbfpsknse1g@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
Biomass estimates of euphausiids in the Georges Bank region from 1999 – 2012
Dr. Michael Jech
Research Fishery Biologist
NOAA/Northeast Fisheries Science Center
Abstract
20170628T121500
20170628T131500
NEFSC Stephen H. Clark Conference Room, NOAA Aquarium Building
0
Dr. Michael Jech
lmjnv96q4mk8liuhsh1vpkc4vs@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
20170629T120000
20170629T130000
0
No Bioseminar Today
lkesstjn8205ioc4aknguoemgo@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
20170706T020500
20170706T030500
0
Takashi Ijichin, University of Tokyo. ‘Evaluation of mixing coefficients in the deep ocean’. Clark 201
mvfqhaiecidnn26gavuqdin224@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
20170706T120000
20170706T130000
Redfield Auditorium
0
Dr. Peter Tyack
20170711T150500-02mm6q7uplh244fa4f7at8slfk_R20170530T190500@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
20170711T150500
20170711T160500
Clark 507
0
Tom Farrar, WHOI. ‘TBD’. Clark 507
jaq2g6n73ljmhg1513qu8ue7d0@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
TBA
Dr. John Hare
Northeast Fisheries Science Center
NOAA
20170713T120000
20170713T130000
Redfield Auditorium
0
Dr. Jon Hare – NOAA
20170718T150500-02mm6q7uplh244fa4f7at8slfk_R20170530T190500@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
20170718T150500
20170718T160500
Clark 507
0
Andreas Thurnherr, LDEO. ‘TBD’. Clark 507
unk3p7n7ijrva84ftaci6o06ng@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
TBA
Dr. Dale Kiefer
20170720T120000
20170720T130000
Redfield Auditorium
0
Dr. Dale Kiefer
uuvh70g3tlchlo4hdgv7ckruvs@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
20170720T140500
20170720T150500
0
Lisa Beal, U. Miami. ‘TBD’. Clark 201.
g7mfpftpqlt6vjckbuh92a0te8@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
TBA
20170727T120000
20170727T130000
0
Dr. Caroline Ummenhoffer
bkm5rpdofo7qrkm5dlv8r374io@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
20170727T140500
20170727T150500
Clark 201
0
Christopher Wolfe, Stony Brook University. ‘TBD’. Clark 201
20170801T150500-02mm6q7uplh244fa4f7at8slfk_R20170530T190500@google.com
20180502T144722Z
WHOI Seminar | Physical Oceanography
20170801T150500
20170801T160500
Clark 507
0
Alexey Fedorov, Yale University. ‘TBD’. Clark 507
rg70gamr6b466doait2cpfdslk@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
TBA
20170810T120000
20170810T130000
Redfield Auditorium
0
MIT International Science & Technology Inititative
bpcjoqpsnsjdpnggspqu79rs50@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
TBA
20170817T120000
20170817T130000
0
Dr. Andrew Solow
n1f1j3s5oihqdg0je32oicgn4s@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
TBA
Dr. Anne Cohem
20170824T120000
20170824T130000
Redfield Auditorium
0
Dr. Anne Cohen
v97rftdk6jatf3qkmjtmquq4i8@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
20170831T120000
20170831T130000
0
No Bioseminar Today
1496258289478@google.com
20180502T144722Z
20170911T120000
20170911T130000
20170925T120000
20171002T120000
20171009T120000
20171016T120000
20171023T120000
20171030T120000
20171106T120000
20171113T120000
20171120T120000
20171211T120000
20171218T120000
Ida Green Lounge
FREQ=WEEKLY;COUNT=15;BYDAY=MO
0
PAOC Colloquium
ai1ec-827531@oceans.mit.edu
20180502T144722Z
Special Events
MIT's Department of Earth, Atmospheric and Planetary Sciences; https://eapsweb.mit.edu/what-do-hurricanes-harvey-and-irma-portend
[caption id="attachment_827533" align="aligncenter" width="576"] Kerry Emanuel: What Do Hurricanes Harvey and Irma Portend?[/caption]
Speaker: Kerry A. Emanuel, Cecil & Ida Green Professor of Atmospheric Science, Co-Director of the Lorenz Center
Date: Wednesday, September 20, 4:00pm to 5:00pm
Location: MIT Campus, 54-100
Special Lecture: "What Do Hurricanes Harvey and Irma Portend?"
Natural disasters are the result of the interaction of a natural phenomenon with human beings and their built environments. Globally and in the U.S., large increases in coastal populations are causing corresponding increases in hurricane damage and these are now being compounded by rising sea levels and changing storm characteristics owing to anthropogenic climate change. In this talk, I will describe projections of changing hurricane activity over the rest of this century and what such projections tell us about how the probabilities of hurricanes like Harvey and Irma have already changed and are likely to continue to do so.
About the Speaker
Kerry Emanuel is a prominent meteorologist and climate scientist who specializes in moist convection in the atmosphere, and tropical cyclones. His research interests focus on tropical meteorology and climate, with a specialty in hurricane physics. His interests also include cumulus convection, the role of clouds, water vapor, and upper-ocean mixing in regulation of climate, and advanced methods of sampling the atmosphere in aid of numerical weather prediction.
Emanuel received an S.B. degree in Earth and Planetary Sciences and a Ph.D. in Meteorology (1978) both from MIT. After completing his doctorate, he joined the faculty of the Atmospheric Sciences department of the University of California at Los Angeles where he remained for three years, with a brief hiatus filming tornadoes in Oklahoma and Texas.
In 1981 he joined the faculty of the Department of Meteorology at MIT and was promoted to Full Professor in 1987 in what had since becomes the Department of Earth, Atmospheric and Planetary Sciences (EAPS). In 1989 he assumed directorship of EAPS Center for Meteorology and Physical Oceanography, a post he held until 1997. Subsequently he chaired the EAPS Program in Atmospheres, Oceans, and Climate from 2009 to 2012. He is co-founder of the MIT Lorenz Center, a climate think tank which fosters creative approaches to learning how climate works.
Professor Emanuel is the author or co-author of over 200 peer-reviewed scientific papers, and three books, including Divine Wind: The History and Science of Hurricanes, published by Oxford University Press, and What We Know about Climate Change, published by the MIT Press.
20170920T160000
20170920T170000
+42.360297;-71.089375
MIT, Cambridge, MA, Building 54-100 @ 77 Massachusetts Ave, Cambridge, MA 02139, USA
0
Special Lecture: What Do Hurricanes Harvey and Irma Portend?
free
atmosphere,climate change,cyclone,eaps,forecast,harvey,hurricane,irma,kerry emanuel,lorenz center,meteorolgy,modeling,ocean,paoc,prediction,sea level,storm,weather
20170925T120000-1496258289478@google.com
20180502T144722Z
20170925T120000
20170925T130000
Ida Green Lounge
0
PAOC Colloquium: Allison Wing
20171002T120000-1496258289478@google.com
20180502T144722Z
20171002T120000
20171002T130000
Ida Green Lounge
0
PAOC Colloquium: Bess Ward (Princeton)
5qb8gdvj6t7udros5nngp805no@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
TBA
Dr. Gerhard Herndl
University of Vienna
20171005T120000
20171005T130000
Redfield Auditorium
0
Dr. Gerhard Herndl
20171016T120000-1496258289478@google.com
20180502T144722Z
20171016T120000
20171016T130000
Ida Green Lounge
0
PAOC Colloquium: Lynne Talley (Scripps)
20171023T120000-1496258289478@google.com
20180502T144722Z
20171023T120000
20171023T130000
Ida Green Lounge
0
PAOC Colloquium: Yohai Kaspi
u27r592mi3li27ero00go85ngg@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
20171026T120000
20171026T130000
0
No Bioseminar today
20171030T120000-1496258289478@google.com
20180502T144722Z
20171030T120000
20171030T130000
Ida Green Lounge
0
PAOC Colloquium: Nathan Steiger (LDEO)
s12uvp1lf3immsprvhiaio1kuc@google.com
20180502T144722Z
WHOI Seminar | Biological Oceanography
20171102T120000
20171102T130000
0
Dr. Jennifer Francis – Rutgers University
20171106T120000-1496258289478@google.com
20180502T144722Z
20171106T120000
20171106T130000
Ida Green Lounge
0
PAOC Colloquium: Jim McWilliams (UCLA)
20171113T120000-1496258289478@google.com
20180502T144722Z
20171113T120000
20171113T130000
Ida Green Lounge
0
PAOC Colloquium: Clara Deser
20171120T120000-1496258289478@google.com
20180502T144722Z
20171120T120000
20171120T130000
Ida Green Lounge
0
PAOC Colloquium: Charles Ichoku
20171211T120000-1496258289478@google.com
20180502T144722Z
20171211T120000
20171211T130000
Ida Green Lounge
0
PAOC Colloquium: Alison Gray, Princeton University