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dc.contributor.author Murray, Tavi
dc.contributor.author Stuart, Graham W.
dc.contributor.author Miller, Paul J.
dc.contributor.author Woodward, John
dc.contributor.author Smith, Andrew M.
dc.contributor.author Porter, Philip R.
dc.contributor.author Jiskoot, Hester
dc.date.accessioned 2019-11-26T23:58:47Z
dc.date.available 2019-11-26T23:58:47Z
dc.date.issued 2000
dc.identifier.citation Murray, T., Stuart, G. W., Miller, P. J., Woodward, J., Smith, A. J., Porter, P. R., & Jiskoot, H. (2000). Glacier surge propagation by thermal evolution at the bed. Journal of Geophysical Research Solid Earth, 105(B6), 13, 491-13, 507. en_US
dc.identifier.uri https://hdl.handle.net/10133/5594
dc.description Sherpa Romeo green journal. Permission to archive final published version. en_US
dc.description.abstract Bakaninbreen, southern Svalbard, began a prolonged surge during 1985. In 1986, an internal reflecting horizon on radio echo sounding data was interpreted to show that the position of the surge front coincided with a transition between areas of warm (unfrozen) and cold (frozen) bed. Ground-penetrating radar lines run in 1996 and 1998 during early quiescence show that the basal region of the glacier is characterized by a strong reflection, interpreted as the top of a thick layer of sediment-rich basal ice. Down glacier of the present surge front, features imaged beneath the basal reflection are interpreted as the bottom of the basal ice layer, the base of a permafrost layer, and local ice lenses. This indicates that this region of the bed is cold. Up glacier of the surge front, a scattering zone above the basal reflection is interpreted as warm ice. There is no evidence for this warm zone down glacier of the surge front, nor do we see basal permafrost up glacier of it. Thus, as in early surge phase, the location of the surge front is now at the transition between warm and cold ice at the glacier bed. We suggest that the propagation of the front is associated with this basal thermal transition throughout the surge. Because propagation of the front occurs rapidly and generates only limited heat, basal motion during fast flow must have been restricted to a thin layer at the bed and occurred by sliding or deformation localized at the ice-bed interface. en_US
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.title Glacier surge propagation by thermal evolution at the bed 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 Natural Environmental Research Council (U.K.) en_US
dc.publisher.institution University of Lethbridge en_US


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