Surge dynamics on Bering Glacier, Alaska, in 2008–2011
A surge cycle of the Bering Glacier system, Alaska, is examined using observations of surface velocity obtained using synthetic aperture radar (SAR) offset tracking, and elevation data obtained from the University of Alaska Fairbanks LiDAR altimetry program. After 13 yr of quiescence, the Bering Gla...
Published in: | The Cryosphere |
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Language: | English |
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Copernicus Publications
2012
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Online Access: | https://doi.org/10.5194/tc-6-1251-2012 http://www.the-cryosphere.net/6/1251/2012/tc-6-1251-2012.pdf https://doaj.org/article/05ebb4e8818c4dad9c54e2b5d4b519b4 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:05ebb4e8818c4dad9c54e2b5d4b519b4 2023-05-15T16:20:22+02:00 Surge dynamics on Bering Glacier, Alaska, in 2008–2011 M. Braun C. F. Larsen R. R. Forster E. W. Burgess 2012-11-01 https://doi.org/10.5194/tc-6-1251-2012 http://www.the-cryosphere.net/6/1251/2012/tc-6-1251-2012.pdf https://doaj.org/article/05ebb4e8818c4dad9c54e2b5d4b519b4 en eng Copernicus Publications doi:10.5194/tc-6-1251-2012 1994-0416 1994-0424 http://www.the-cryosphere.net/6/1251/2012/tc-6-1251-2012.pdf https://doaj.org/article/05ebb4e8818c4dad9c54e2b5d4b519b4 undefined The Cryosphere, Vol 6, Iss 6, Pp 1251-1262 (2012) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2012 fttriple https://doi.org/10.5194/tc-6-1251-2012 2023-01-22T19:27:12Z A surge cycle of the Bering Glacier system, Alaska, is examined using observations of surface velocity obtained using synthetic aperture radar (SAR) offset tracking, and elevation data obtained from the University of Alaska Fairbanks LiDAR altimetry program. After 13 yr of quiescence, the Bering Glacier system began to surge in May 2008 and had two stages of accelerated flow. During the first stage, flow accelerated progressively for at least 10 months and reached peak observed velocities of ~ 7 m d−1. The second stage likely began in 2010. By 2011 velocities exceeded 9 m d−1 or ~ 18 times quiescent velocities. Fast flow continued into July 2011. Surface morphology indicated slowing by fall 2011; however, it is not entirely clear if the surge is yet over. The quiescent phase was characterized by small-scale acceleration events that increased driving stresses up to 70%. When the surge initiated, synchronous acceleration occurred throughout much of the glacier length. Results suggest that downstream propagation of the surge is closely linked to the evolution of the driving stress during the surge, because driving stress appears to be tied to the amount of resistive stress provided by the bed. In contrast, upstream acceleration and upstream surge propagation is not dependent on driving stress evolution. Article in Journal/Newspaper glacier The Cryosphere Alaska Unknown Fairbanks The Cryosphere 6 6 1251 1262 |
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English |
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geo envir |
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geo envir M. Braun C. F. Larsen R. R. Forster E. W. Burgess Surge dynamics on Bering Glacier, Alaska, in 2008–2011 |
topic_facet |
geo envir |
description |
A surge cycle of the Bering Glacier system, Alaska, is examined using observations of surface velocity obtained using synthetic aperture radar (SAR) offset tracking, and elevation data obtained from the University of Alaska Fairbanks LiDAR altimetry program. After 13 yr of quiescence, the Bering Glacier system began to surge in May 2008 and had two stages of accelerated flow. During the first stage, flow accelerated progressively for at least 10 months and reached peak observed velocities of ~ 7 m d−1. The second stage likely began in 2010. By 2011 velocities exceeded 9 m d−1 or ~ 18 times quiescent velocities. Fast flow continued into July 2011. Surface morphology indicated slowing by fall 2011; however, it is not entirely clear if the surge is yet over. The quiescent phase was characterized by small-scale acceleration events that increased driving stresses up to 70%. When the surge initiated, synchronous acceleration occurred throughout much of the glacier length. Results suggest that downstream propagation of the surge is closely linked to the evolution of the driving stress during the surge, because driving stress appears to be tied to the amount of resistive stress provided by the bed. In contrast, upstream acceleration and upstream surge propagation is not dependent on driving stress evolution. |
format |
Article in Journal/Newspaper |
author |
M. Braun C. F. Larsen R. R. Forster E. W. Burgess |
author_facet |
M. Braun C. F. Larsen R. R. Forster E. W. Burgess |
author_sort |
M. Braun |
title |
Surge dynamics on Bering Glacier, Alaska, in 2008–2011 |
title_short |
Surge dynamics on Bering Glacier, Alaska, in 2008–2011 |
title_full |
Surge dynamics on Bering Glacier, Alaska, in 2008–2011 |
title_fullStr |
Surge dynamics on Bering Glacier, Alaska, in 2008–2011 |
title_full_unstemmed |
Surge dynamics on Bering Glacier, Alaska, in 2008–2011 |
title_sort |
surge dynamics on bering glacier, alaska, in 2008–2011 |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/tc-6-1251-2012 http://www.the-cryosphere.net/6/1251/2012/tc-6-1251-2012.pdf https://doaj.org/article/05ebb4e8818c4dad9c54e2b5d4b519b4 |
geographic |
Fairbanks |
geographic_facet |
Fairbanks |
genre |
glacier The Cryosphere Alaska |
genre_facet |
glacier The Cryosphere Alaska |
op_source |
The Cryosphere, Vol 6, Iss 6, Pp 1251-1262 (2012) |
op_relation |
doi:10.5194/tc-6-1251-2012 1994-0416 1994-0424 http://www.the-cryosphere.net/6/1251/2012/tc-6-1251-2012.pdf https://doaj.org/article/05ebb4e8818c4dad9c54e2b5d4b519b4 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-6-1251-2012 |
container_title |
The Cryosphere |
container_volume |
6 |
container_issue |
6 |
container_start_page |
1251 |
op_container_end_page |
1262 |
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1766008273976164352 |