Greenland: a Laboratory for the Symptoms of Global Warming (45 Photos)

A tent, near the worksite of scientists Sarah Das from the Woods Hole Oceanographic Institution and Ian Joughin of the University of Washington along with their team, as they conduct research on July 15, 2013 on the glacial ice sheet. The scientists set up Global Positioning System sensors to closely monitor the evolution of the surface lakes and the motion of the surrounding ice sheet and have uncovered a plumbing system for the ice sheet, where meltwater can penetrate thick, cold ice and accelerate some of the large-scale summer movements of the ice sheet. (Joe Raedle/Getty Images)
Greenland: a Laboratory for the Symptoms of Global Warming (45 Photos)
   
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