In recent years, ground-penetrating radar (GPR) has been increasingly used for characteri-zation of subglacial and englacial environments at polythermal glaciers. The geophysical method is able to exploit the dielectric difference between water, air, sediment and ice, allowing delineation of subsurf...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.536.520 2023-05-15T15:05:38+02:00 T. D. L. Irvine-fynn B. J. Moorman J. L. M. Williams F. S. A. Walter The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.536.520 http://people.ucalgary.ca/~moorman/ESPL2006.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.536.520 http://people.ucalgary.ca/~moorman/ESPL2006.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://people.ucalgary.ca/~moorman/ESPL2006.pdf text ftciteseerx 2016-01-08T10:50:26Z In recent years, ground-penetrating radar (GPR) has been increasingly used for characteri-zation of subglacial and englacial environments at polythermal glaciers. The geophysical method is able to exploit the dielectric difference between water, air, sediment and ice, allowing delineation of subsurface hydrological, thermal and structural conditions. More recent GPR research has endeavoured to examine temporal change in glaciers, in particular the distribution of the cold ice zone at polythermal glaciers. However, the exact nature of temporal change that can be identified using GPR has not been fully examined. This re-search presents the results of three GPR surveys conducted over the course of a summer ablation season at a polythermal glacier in the Canadian Arctic. A total of approximately 30 km of GPR profiles were collected in 2002 repeatedly covering the lower 2 km of Stagna-tion Glacier, Bylot Island (72°58 ′ N 78°22 ′ W). Comparison between profiles indicated changes in the radar signature, including increased noise, appearance and disappearance of englacial reflections, and signal attenuation in the latter survey. Further, an area of chaotic returns in up-glacier locations, which was interpreted to be a wet temperate ice zone, showed marked Text Arctic Bylot Island Unknown Arctic Bylot Island |
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Open Polar |
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ftciteseerx |
language |
English |
description |
In recent years, ground-penetrating radar (GPR) has been increasingly used for characteri-zation of subglacial and englacial environments at polythermal glaciers. The geophysical method is able to exploit the dielectric difference between water, air, sediment and ice, allowing delineation of subsurface hydrological, thermal and structural conditions. More recent GPR research has endeavoured to examine temporal change in glaciers, in particular the distribution of the cold ice zone at polythermal glaciers. However, the exact nature of temporal change that can be identified using GPR has not been fully examined. This re-search presents the results of three GPR surveys conducted over the course of a summer ablation season at a polythermal glacier in the Canadian Arctic. A total of approximately 30 km of GPR profiles were collected in 2002 repeatedly covering the lower 2 km of Stagna-tion Glacier, Bylot Island (72°58 ′ N 78°22 ′ W). Comparison between profiles indicated changes in the radar signature, including increased noise, appearance and disappearance of englacial reflections, and signal attenuation in the latter survey. Further, an area of chaotic returns in up-glacier locations, which was interpreted to be a wet temperate ice zone, showed marked |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
T. D. L. Irvine-fynn B. J. Moorman J. L. M. Williams F. S. A. Walter |
spellingShingle |
T. D. L. Irvine-fynn B. J. Moorman J. L. M. Williams F. S. A. Walter |
author_facet |
T. D. L. Irvine-fynn B. J. Moorman J. L. M. Williams F. S. A. Walter |
author_sort |
T. D. L. Irvine-fynn |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.536.520 http://people.ucalgary.ca/~moorman/ESPL2006.pdf |
geographic |
Arctic Bylot Island |
geographic_facet |
Arctic Bylot Island |
genre |
Arctic Bylot Island |
genre_facet |
Arctic Bylot Island |
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http://people.ucalgary.ca/~moorman/ESPL2006.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.536.520 http://people.ucalgary.ca/~moorman/ESPL2006.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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