Lakes on Greenland Ice Sheet can drain huge amounts of water, even in winter

Using satellite data to 'see in the dark', researchers have shown for the first time that lakes on the Greenland Ice Sheet drain during winter, a finding with implications for the speed at which the world's second-largest ice sheet flows to the ocean.

source https://phys.org/news/2021-03-lakes-greenland-ice-sheet-huge.html