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Surge-related topographic change of the glacier Sortebræ, East Greenland, derived from synthetic aperture radar interferometry

Lookup NU author(s): Professor Stuart Barr

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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 30-40m; however, downdraw of up to 270m in the reservoir zone, and uplift of up to 145m 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.


Publication metadata

Author(s): Pritchard H, Murray T, Strozzi T, Barr SL, Luckman A

Publication type: Article

Publication status: Published

Journal: Journal of Glaciology

Year: 2003

Volume: 49

Issue: 166

Pages: 381-390

ISSN (print): 0022-1430

ISSN (electronic): 1727-5652

URL: http://dx.doi.org/10.3189/172756503781830593

DOI: 10.3189/172756503781830593


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