Surge-related topographic change of the glacier Sortebrae, East Greenland, derived from synthetic aperture radar interferometry
Abstract:A major surge of the glacier complex of Sortebrae, East Greenland, occurred between 1992 and 1995.The impact of this surge on the topography of Sortebrae was examined through the production of a pre-surge (1981) digital elevation model (DEM) from interpolated digital map data, and a post-surge DEM from differential synthetic aperture radar interferometry using European Remote-sensing Satellite (ERS) imagery.The combined vertical error is typically 30-40 m; however, downdraw of up to 270 m in the reservoir zone, and uplift of up to 145 m in the receiving zone were measured. The upper glacier reservoir area discharged in excess of 24.3 ± 9.5 km3 volume over the surge, of which ~12.5 km3 was stored in the advanced lower glacier, the balance being lost, predominantly to calving.
Document Type: Research Article
Publication date: 2003-06-01
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