The Cryosphere Surge dynamics on Bering Glacier, Alaska, in 2008–2011
Abstract. A surge cycle of the Bering Glacier system, Alaska, is examined using observations of surface veloc-ity 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...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1032.5834 2023-05-15T16:20:22+02:00 The Cryosphere Surge dynamics on Bering Glacier, Alaska, in 2008–2011 E. W. Burgess R. R. Forster C. F. Larsen M. Braun The Pennsylvania State University CiteSeerX Archives 2012 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1032.5834 http://www.the-cryosphere.net/6/1251/2012/tc-6-1251-2012.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1032.5834 http://www.the-cryosphere.net/6/1251/2012/tc-6-1251-2012.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.the-cryosphere.net/6/1251/2012/tc-6-1251-2012.pdf text 2012 ftciteseerx 2016-10-30T00:15:09Z Abstract. A surge cycle of the Bering Glacier system, Alaska, is examined using observations of surface veloc-ity 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 ac-celeration 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. 1 Text glacier Alaska Unknown Fairbanks |
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Open Polar |
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ftciteseerx |
language |
English |
description |
Abstract. A surge cycle of the Bering Glacier system, Alaska, is examined using observations of surface veloc-ity 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 ac-celeration 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. 1 |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
E. W. Burgess R. R. Forster C. F. Larsen M. Braun |
spellingShingle |
E. W. Burgess R. R. Forster C. F. Larsen M. Braun The Cryosphere Surge dynamics on Bering Glacier, Alaska, in 2008–2011 |
author_facet |
E. W. Burgess R. R. Forster C. F. Larsen M. Braun |
author_sort |
E. W. Burgess |
title |
The Cryosphere Surge dynamics on Bering Glacier, Alaska, in 2008–2011 |
title_short |
The Cryosphere Surge dynamics on Bering Glacier, Alaska, in 2008–2011 |
title_full |
The Cryosphere Surge dynamics on Bering Glacier, Alaska, in 2008–2011 |
title_fullStr |
The Cryosphere Surge dynamics on Bering Glacier, Alaska, in 2008–2011 |
title_full_unstemmed |
The Cryosphere Surge dynamics on Bering Glacier, Alaska, in 2008–2011 |
title_sort |
cryosphere surge dynamics on bering glacier, alaska, in 2008–2011 |
publishDate |
2012 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1032.5834 http://www.the-cryosphere.net/6/1251/2012/tc-6-1251-2012.pdf |
geographic |
Fairbanks |
geographic_facet |
Fairbanks |
genre |
glacier Alaska |
genre_facet |
glacier Alaska |
op_source |
http://www.the-cryosphere.net/6/1251/2012/tc-6-1251-2012.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1032.5834 http://www.the-cryosphere.net/6/1251/2012/tc-6-1251-2012.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766008273273618432 |