The Greenland Ice Sheet is a 1.7 million-square-kilometer, 2-mile thick layer of ice that covers Greenland. Over the past two decades, ice loss from the Greenland Ice Sheet increased four-fold contributing to one-quarter of global sea level rise. (Photo courtesy of Fiamma Straneo, Woods Hole Oceanographic Institution)

Full resolution (350 × 263)
The Greenland Ice Sheet is a 1.7 million-square-kilometer, 2-mile thick layer of ice that covers Greenland. Over the past two decades, ice loss from the Greenland Ice Sheet increased four-fold contributing to one-quarter of global sea level rise. (Photo courtesy of Fiamma Straneo, Woods Hole Oceanographic Institution)