The vast northern ice sheet of Greenland melts every summer, pooling lakes of meltwater on its surface and losing fleets of icebergs from its finger-like glaciers.  in a warming climate, there are reasons to think these melt seasons are getting more intense, pouring more and more freshwater into the ocean...

During the month of July, an atmospheric phenomenon called a “cutoff high” — a region of high pressure that stayed relatively immobile over the ice sheet, bringing with it sustained sunny conditions — lingered for many days and produced unusual warmth at the surface and record melting for northwest Greenland