The amount of ice flowing from the Antarctic glacier has doubled in the span of three decades, and scientists think it could undergo even more dramatic changes in the near future.
Where once two streams of ice merged in Greenland’s Jakobshavn Glacier, today there is division and a complex surface riddled with crevasses and melt ponds.
This pair of images shows the retreat of the Sermersuaq (Humboldt) Glacier in northwestern Greenland between 2000 and 2008. Sermersuaq Glacier is the widest tidewater glacier in the Northern Hemisphere.
A peek under the ice reveals a Grand Canyon-sized channel under the Jakobshavn glacier—one reason why the Greenland glacier contributes more to sea level rise than any other single feature in the Northern Hemisphere.