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Researchers installing a GPS unit on the Greenland ice sheet.

Researchers installing a GPS unit on the Greenland ice sheet.
Researchers installing a GPS unit on the Greenland ice sheet.
Researchers installing a GPS unit on the Greenland ice sheet.
Researchers installing a GPS unit on the Greenland ice sheet.
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Stevens, Laura A.
Researchers installing a GPS unit on the Greenland ice sheet.
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05/09/2008
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Image Of the Day caption:
Each spring, the melting ice sheet forms large lakes. A decade ago, scientists discovered that cracks can form suddenly in the bottom of these lakes and drain them within hours. To learn how this phenomenon happens, a research team led by Sarah Das (left) and Mark Behn at WHOI and Ian Joughin at the University of Washington (center), along with UW graduate student Josh Carmichael (right), installed a network of GPS units to record the movements of the ice before, during, and after a sudden drainage event. Their study, published in June 2015, discovered a surprising trigger mechanism.
Photo by Laura Stevens
© Woods Hole Oceanographic Institution
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