Abrupt Shift in the Observed Runoff from the Southwest Greenland Ice Sheet?

Andreas Ahlstrom1, Dorthe Petersen2, Jason Box3, Peter P Langen4 and Michele Citterio3, (1)Geological Survey of Denmark and Greenland, Copenhagen, Denmark, (2)Asiaq, Greenland Survey, Nuuk, Greenland, (3)Geological Survey of Denmark and Greenland, København K, Denmark, (4)Danish Meteorological Institute, København Ø, Denmark