Show simple item record Murray, Tavi Strozzi, Tazio Luckman, Adrian Jiskoot, Hester Christakos, Panos 2019-11-26T22:26:51Z 2019-11-26T22:26:51Z 2003
dc.identifier.citation Murray, T., Strozzi, T., Luckman, A., Jiskoot, H., & Christakos, P. (2003). Is there a single surge mechanism? Contrasts in dynamics between glacier surges in Svalbard and other regions. Journal of Geophysical Research, 108(B5), 2237. doi:10.1029/2002JB001906 en_US
dc.description Sherpa Romeo green journal. Permission to archive final published version. en_US
dc.description.abstract During the 1990s, Monacobreen, a 40-km-long tidewater glacier in Svalbard, underwent a major surge. We mapped the surge dynamics using ERS synthetic aperture radar images, differential dual-azimuth interferometry and intensity correlation tracking. A series of 11 three-dimensional (3-D) velocity maps covering the period 1991–1997 show a months-long initiation and years-long termination to the surge, with no indication of a surge front travelling downglacier. During the surge, the front of the glacier advanced 2 km, the velocity and derived strain rate increased by more than an order of magnitude, and maximum ice flow rates measured during 1994 were 5md 1. The spatial pattern of both velocity and strain rate was remarkably consistent and must therefore be controlled by spatially fixed processes operating at the glacier bed. We combine these results with those published in the literature to construct a typical Svalbard glacier surge cycle and compare this to surge dynamics of glaciers from other cluster regions, especially those of Variegated Glacier in Alaska. The strong contrast in dynamics suggests that there exist at least two distinct surge mechanisms. en_US
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.subject Glacier surging en_US
dc.subject Glacier dynamics en_US
dc.subject Interferometry en_US
dc.subject Svalbard en_US
dc.subject Synthetic aperture radar (SAR) en_US
dc.subject Remote sensing en_US
dc.title Is there a single surge mechanism? Contrasts in dynamics between glacier surges in Svalbard and other regions en_US
dc.type Article en_US
dc.publisher.faculty Arts and Science en_US
dc.publisher.department Department of Geography en_US
dc.description.peer-review Yes en_US
dc.publisher.institution University of Leeds en_US
dc.publisher.institution University of Wales en_US
dc.publisher.institution University of Lethbridge en_US

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