The hills in the ice sheet.
This photo may look like there is a lot of snow on it. Make no mistake, though – what appears to be wet snow, is actually very hard ice crystals that creak loudly under your shoes. The climate above the Greenlandic ice sheet is very dry (but not dry enough to prevent snowfall), which means that any snowfall is unlikely to evaporate, instead, the accumulated ice melts into rivers, or is very slowly pushed into the sea. I'm no geologist, so I may confuse the terms, but I think this type of surface is called firn.