Analysis of the 1993-95 Bering Glacier (Alaska) surge using differential SAR interferometry
Abstract Differential spaceborne radar interferometry observations of West Bagley Icefield are used to measure surface velocity and topography. Bagley Icefield is the accumulation area fur Bering Glacier which surged in two phases from spring 1993 through summer 1905. The observations presented are...
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1998
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Online Access: | http://dx.doi.org/10.1017/s0022143000002057 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000002057 |
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crcambridgeupr:10.1017/s0022143000002057 2024-09-15T18:07:32+00:00 Analysis of the 1993-95 Bering Glacier (Alaska) surge using differential SAR interferometry Fatland, Dennis R. Lingle, Craig S. 1998 http://dx.doi.org/10.1017/s0022143000002057 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000002057 en eng Cambridge University Press (CUP) Journal of Glaciology volume 44, issue 148, page 532-546 ISSN 0022-1430 1727-5652 journal-article 1998 crcambridgeupr https://doi.org/10.1017/s0022143000002057 2024-08-28T04:02:45Z Abstract Differential spaceborne radar interferometry observations of West Bagley Icefield are used to measure surface velocity and topography. Bagley Icefield is the accumulation area fur Bering Glacier which surged in two phases from spring 1993 through summer 1905. The observations presented are based on data collected during the winter of 1992, prior to the surge, and during winter 1994 while the surge was in full progress. Both observation intervals correspond to 3 day repeat orbit phases of the ERS-I C-band SAR. This paper gives an overview of the algorithms used to derive surface-velocity vector fields and topography for valley glaciers from SAR images. The resulting high-resolution velocity data clearly show West Bagley Icefield accelerating from its quiescent pre-surge velocity by a factor of 2.7 in response to the Bering Glacier surge. Persistence of lnterfero-metric phase coherence and the relatively moderate degree of acceleration on the western arm of Bagley Icefield suggest that the velocity increase may have been caused by increased longitudinal stress gradients resulting from coupling to the surging main trunk of Bering Glacier. Article in Journal/Newspaper glacier glaciers Journal of Glaciology Alaska Cambridge University Press Journal of Glaciology 44 148 532 546 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract Differential spaceborne radar interferometry observations of West Bagley Icefield are used to measure surface velocity and topography. Bagley Icefield is the accumulation area fur Bering Glacier which surged in two phases from spring 1993 through summer 1905. The observations presented are based on data collected during the winter of 1992, prior to the surge, and during winter 1994 while the surge was in full progress. Both observation intervals correspond to 3 day repeat orbit phases of the ERS-I C-band SAR. This paper gives an overview of the algorithms used to derive surface-velocity vector fields and topography for valley glaciers from SAR images. The resulting high-resolution velocity data clearly show West Bagley Icefield accelerating from its quiescent pre-surge velocity by a factor of 2.7 in response to the Bering Glacier surge. Persistence of lnterfero-metric phase coherence and the relatively moderate degree of acceleration on the western arm of Bagley Icefield suggest that the velocity increase may have been caused by increased longitudinal stress gradients resulting from coupling to the surging main trunk of Bering Glacier. |
format |
Article in Journal/Newspaper |
author |
Fatland, Dennis R. Lingle, Craig S. |
spellingShingle |
Fatland, Dennis R. Lingle, Craig S. Analysis of the 1993-95 Bering Glacier (Alaska) surge using differential SAR interferometry |
author_facet |
Fatland, Dennis R. Lingle, Craig S. |
author_sort |
Fatland, Dennis R. |
title |
Analysis of the 1993-95 Bering Glacier (Alaska) surge using differential SAR interferometry |
title_short |
Analysis of the 1993-95 Bering Glacier (Alaska) surge using differential SAR interferometry |
title_full |
Analysis of the 1993-95 Bering Glacier (Alaska) surge using differential SAR interferometry |
title_fullStr |
Analysis of the 1993-95 Bering Glacier (Alaska) surge using differential SAR interferometry |
title_full_unstemmed |
Analysis of the 1993-95 Bering Glacier (Alaska) surge using differential SAR interferometry |
title_sort |
analysis of the 1993-95 bering glacier (alaska) surge using differential sar interferometry |
publisher |
Cambridge University Press (CUP) |
publishDate |
1998 |
url |
http://dx.doi.org/10.1017/s0022143000002057 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000002057 |
genre |
glacier glaciers Journal of Glaciology Alaska |
genre_facet |
glacier glaciers Journal of Glaciology Alaska |
op_source |
Journal of Glaciology volume 44, issue 148, page 532-546 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000002057 |
container_title |
Journal of Glaciology |
container_volume |
44 |
container_issue |
148 |
container_start_page |
532 |
op_container_end_page |
546 |
_version_ |
1810444927693225984 |