The locations of these topographic lows ... that water at the base of the ice sheet flows unimpeded to the ice margin, subglacial water residence times and drainage network efficiency remain ...

Researchers report field observations of the rapid draining of a lake on the Greenland Ice Sheet. Supraglacial lakes can drain to the bed of ice sheets in a matter of hours, altering ice dynamics ...

image: Lakes form on the surface of the Greenland ice sheet each summer as the weather warms. They exist for weeks or months but can drain in a matter of hours due to hydrofracturing, transferring ...