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Flow of glacial ice
This image, which shows the flow of glacial ice toward the ocean, was derived from measurements from the European Space Agency's Earth Resource Satellite. The flow rate of the Jakobshavn Glacier in Greenland more than doubled from 1997 to 2003.
The sea ice around Antarctica on Sept. 27, 2004, as measured by QuikSCAT.
This image, taken by Moderate Resolution Imaging Spectroradiometer (MODIS) on Jan. 31, 2002, shows meltwater starting to form on the Antarctic Larsen Ice Shelf prior to its collapse.