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Greenland's Supraglacial Lakes
Greenland is home to the second largest ice sheet in the world. If this ice sheet melts, global sea level would rise by 23 feet. Motivated by an alarming acceleration of Greenland's outlet glaciers, a team of researchers is studying the formation--and sudden disappearance--of meltwater lakes on the ice sheet. Their instruments have revealed that the lakes' water lubricates the base of the glacier, increasing the speed at which the rivers of ice are sliding into the sea.