Extended Data Fig. 4: Evolution of the ice surface of the Harder Glacier following the two subglacial lake drainage events in 1990 and 2014.
From: Outburst of a subglacial flood from the surface of the Greenland Ice Sheet
True colour Landsat 5 and 8 composites showing the evolution of the ice surface of the Harder Glacier following the two subglacial lake drainage events in 1990 and 2014. a Landsat scene showing the study area after the 2014 subglacial lake drainage event on 1st August 2014 b-e. Time series of Landsat 5 images spanning the 1990 lake drainage event. f-i. Time series of Landsat 8 images spanning the 2014 lake drainage event. The 1990 lake drainage event was inferred from visual inspection of Landsat images dating back to 1985, to identify consecutive images that showed evidence of (1) a geometric change, from doming to a depression, in the surface, and (2) the formation of new fractures in the vicinity of the basin. Landsat 5 and 8 data from https://earthexplorer.usgs.gov.
