Figure 2: Topography of collapse basin.
From: Subglacial lake drainage detected beneath the Greenland ice sheet
(a) Surface elevation of the collapse basin and nearby supraglacial lake basin (in metres above WGS84 ellipsoid) from SETSM (colour bar), and ICESat (coloured circles), overlaid on a hillshaded version of the SETSM DEM. The location of the nearby moulin is shown as a black circle. (b) Profiles of surface elevation in 2007 from the GIMP DEM (blue) and 28 October 2011 from the SETSM DEM (green). The vertical bars show where the two profiles intersect.
