Co-evolution of life and the environment on early Earth; study of the microfossil record associated with major climatic and geochemical oscillations in the Neoproterozoic.
Marine chemistry: distribution of trace elements in the ocean and their use as paleochemical tracers; response of the ocean to anthropogenic lead emissions; relation between dust, iron in the ocean, and marine biological activity.
Microbial oceanography: the role of marine phytoplankton in the ocean’s “metabolism”; the cyanobacterium Prochlorococcus as a model to study marine ecology from the genome level to the whole ocean.
Ocean circulation: dynamics of the ocean and climate, atmospheric and oceanic turbulence, air-sea interactions, the energetics of the ocean circulation, the impact of ocean physics on biology, and paleoclimate.
Environmental organic chemistry: phase exchanges and transformation processes; the modeling of fates of organic pollutants; the roles of colloids and black carbons; and passive sampling for site evaluation.
Earth’s biochemical cycles and development of novel observational systems to study those cycles; methods to interact sustainably with the natural environment.
Ocean modeling and data assimilation techniques to quantify regional ocean dynamics on multiple scales; new methods for multiscale modeling, uncertainty quantification, data assimilation and the guidance of autonomous vehicles.
Physical mechanisms which affect the transport and fate of contaminants and nutrients in surface water systems; wetland hydrodynamics, vegetated flow dynamics, and lake physics.
Interplay among atmosphere, rock, water and microbes; the photochemical sulfur isotope effect, early microbial evolution, deep biosphere, and seafloor hydrothermal deposits.
Exploration of structure-function relationships in microbial communities using quantitative molecular approaches, genomics, physiology, and modeling.
Dynamical organization of the natural environment through investigation of the cooperative phenomena underlying common yet poorly understood observations. Work combines theory, field observations, and experiments to study problems including the carbon cycle and climate, the co-evolution of life and the environment, and the dynamics of fluids, rocks, and sand.
Physical ecology of microorganisms; microscale transport phenomena; microfluidic experiments to understand how physical forces and chemical signals shape the behavior of marine microorganisms.
Biogeochemistry and geobiology: lipid chemistry of geologically significant microbes and microbial ecosystems; organic and isotopic indicators of climate change; evolution and mass extinction; biomarkers in sediments and petroleum; and biogeochemical fossils.
Microbial oceanography: study of the relationship between the structure of microbial communities and their function using molecular biology, genomics, and genetics.