Video file: West Antarctic Glacier Loss Appears Unstoppable

Video file for media and public use. A new study by researchers at NASA's Jet Propulsion Laboratory and the University of California, Irvine, finds that a rapidly melting section of the West Antarctic Ice Sheet appears to be in an irreversible state of decline, with nothing to stop the entire glacial basin from melting into the sea. Three major lines of evidence point to the glaciers' eventual demise: their flow speeds and how they change with time, how much each glacier is floating on seawater rather than lying on land, and the slope of the terrain they are flowing over and its depth below sea level. These glaciers already contribute significantly to sea level rise, releasing as much ice into the ocean each year as the entire Greenland Ice Sheet does.
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