Let me be the first to ask...
How the Hell does a continental ice sheet, that sits over LAND, get warm ocean currents under it?
The Greenland ice cap is over land, not ocean. Very little sticks out into the water. Mostly the coast of Greenland is just barren, rocky peninsulas and fjords.
I'm just puzzled as to how a warm ocean current gets under all that rock.
More photos of the Greenland coast here.