Lookup NU author(s): Professor Stuart Barr
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
 We have measured the surface flow rate of the large east Greenland glacier, Sortebrae, through both the initiation and termination of a major surge using synthetic aperture radar (SAR) feature tracking, optimized to minimize error. The Sortebrae surge began between November and January 1992 - 1993, after at least 6 weeks of subfreezing temperatures over the whole glacier, and propagated rapidly up-glacier from a central nucleus. Sortebrae reached sustained fast flow rates of up to 24 m d(-1), and the active phase lasted for 28 - 32 months before terminating in June 1995. Termination was abrupt, coinciding with the arrival of the spring thaw and the apparent release of a large volume of stored water from a single outlet at the front. The surge mechanism is interpreted as a switch from channelized to distributed drainage, which at present is best explained by Kamb's linked cavity sliding model.
Author(s): Pritchard H, Murray T, Luckman A, Strozzi T, Barr SL
Publication type: Article
Publication status: Published
Journal: Journal of Geophysical Research: Earth Surface
ISSN (print): 0148-0227
Altmetrics provided by Altmetric