- Basal meltwater is thawing the Greenland Ice Sheet from the bottom up. Study reveals that meltwater is falling to the base through cracks in the surface with such force, the power produced is comparable to that generated by the world's largest hydroelectric power station, creating a melting effect. https://newatlas.com/environment/basal-meltwater-thawing-greenland-ice-sheet/ 13 comments science