The Dark Zone of Greenland
ice sheet is a large continuous region on the
western flank of the
ice sheet; it is some 400 kilometers wide stretching about 100 kilometres up from the
margin of the
ice.
Observation of a precipitation map (focused not on the outer
margin, but on the accumulation zone of the
ice sheet) indicates that highest accumulation rates, over 40 cm per year, extend along the
western side of the
ice sheet to the southeast quadrant of the
ice sheet.