Is there a single surge mechanism? Contrasts in dynamics between glacier surges in Svalbard and other regions

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dc.contributor.authorMurray, Tavi
dc.contributor.authorStrozzi, Tazio
dc.contributor.authorLuckman, Adrian
dc.contributor.authorJiskoot, Hester
dc.contributor.authorChristakos, Panos
dc.date.accessioned2019-11-26T22:26:51Z
dc.date.available2019-11-26T22:26:51Z
dc.date.issued2003
dc.descriptionSherpa Romeo green journal. Permission to archive final published version.en_US
dc.description.abstractDuring 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.description.peer-reviewYesen_US
dc.identifier.citationMurray, 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:10.1029/2002JB001906en_US
dc.identifier.urihttps://hdl.handle.net/10133/5592
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.publisher.departmentDepartment of Geographyen_US
dc.publisher.facultyArts and Scienceen_US
dc.publisher.institutionUniversity of Leedsen_US
dc.publisher.institutionUniversity of Walesen_US
dc.publisher.institutionUniversity of Lethbridgeen_US
dc.publisher.urlhttps://dx.doi.org/10.1029/2002JB001906
dc.subjectGlacier surgingen_US
dc.subjectGlacier dynamicsen_US
dc.subjectInterferometryen_US
dc.subjectSvalbarden_US
dc.subjectSynthetic aperture radar (SAR)en_US
dc.subjectRemote sensingen_US
dc.titleIs there a single surge mechanism? Contrasts in dynamics between glacier surges in Svalbard and other regionsen_US
dc.typeArticleen_US
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