Controls on Calving Rate and Basal Sliding: Observations from Columbia Glacier, Alaska, Prior to and During its Rapid Retreat, 1976-1993
The University Archives has determined that this item is of continuing value to OSU's history. Data collected by the USGS (Tacoma) on Columbia Glacier prior to and during its rapid retreat, are discussed to identify processes that control the calving rate and sliding speed. During the retreat,...
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Byrd Polar Research Center, The Ohio State University.
1995
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ftohiostateu:oai:kb.osu.edu:1811/38768 2023-05-15T16:20:17+02:00 Controls on Calving Rate and Basal Sliding: Observations from Columbia Glacier, Alaska, Prior to and During its Rapid Retreat, 1976-1993 van der Veen, C.J. 1995 application/pdf http://hdl.handle.net/1811/38768 en_US eng Byrd Polar Research Center, The Ohio State University. Report (Byrd Polar Research Center) no. 11 van der Veen, C.J. 1995. Controls on Calving Rate and Basal Sliding: Observations from Columbia Glacier, Alaska, Prior to and During its Rapid Retreat, 1976-1993. Byrd Polar Research Center Report No. 11, Byrd Polar Research Center, The Ohio State University, 72 pages. 0896-2472 http://hdl.handle.net/1811/38768 Columbia Glacier Alaska Glaciers -- Alaska Basal sliding of glaciers Calving glaciers Technical Report Map 1995 ftohiostateu 2020-08-22T19:35:05Z The University Archives has determined that this item is of continuing value to OSU's history. Data collected by the USGS (Tacoma) on Columbia Glacier prior to and during its rapid retreat, are discussed to identify processes that control the calving rate and sliding speed. During the retreat, the rate of calving increased almost seven-fold, but at the same time, the glacier speed increased almost as much so that the actual rate of retreat increased slowly. The calving rate is not simply linked to water depth or ice thickness near the terminus. The only statistically significant correlation found is between calving rate and height above buoyancy. The sliding speed does not obey the commonly-used inverse relation between speed and effective basal pressure, unless basal drag changed during the retreat. The data discussed suggest that the long-term velocity near the terminus of Columbia Glacier is linearly dependent on the height above buoyancy. National Science Foundation Grant OPP-9321556. Report glacier glaciers Polar Research Alaska Ohio State University (OSU): Knowledge Bank |
institution |
Open Polar |
collection |
Ohio State University (OSU): Knowledge Bank |
op_collection_id |
ftohiostateu |
language |
English |
topic |
Columbia Glacier Alaska Glaciers -- Alaska Basal sliding of glaciers Calving glaciers |
spellingShingle |
Columbia Glacier Alaska Glaciers -- Alaska Basal sliding of glaciers Calving glaciers van der Veen, C.J. Controls on Calving Rate and Basal Sliding: Observations from Columbia Glacier, Alaska, Prior to and During its Rapid Retreat, 1976-1993 |
topic_facet |
Columbia Glacier Alaska Glaciers -- Alaska Basal sliding of glaciers Calving glaciers |
description |
The University Archives has determined that this item is of continuing value to OSU's history. Data collected by the USGS (Tacoma) on Columbia Glacier prior to and during its rapid retreat, are discussed to identify processes that control the calving rate and sliding speed. During the retreat, the rate of calving increased almost seven-fold, but at the same time, the glacier speed increased almost as much so that the actual rate of retreat increased slowly. The calving rate is not simply linked to water depth or ice thickness near the terminus. The only statistically significant correlation found is between calving rate and height above buoyancy. The sliding speed does not obey the commonly-used inverse relation between speed and effective basal pressure, unless basal drag changed during the retreat. The data discussed suggest that the long-term velocity near the terminus of Columbia Glacier is linearly dependent on the height above buoyancy. National Science Foundation Grant OPP-9321556. |
format |
Report |
author |
van der Veen, C.J. |
author_facet |
van der Veen, C.J. |
author_sort |
van der Veen, C.J. |
title |
Controls on Calving Rate and Basal Sliding: Observations from Columbia Glacier, Alaska, Prior to and During its Rapid Retreat, 1976-1993 |
title_short |
Controls on Calving Rate and Basal Sliding: Observations from Columbia Glacier, Alaska, Prior to and During its Rapid Retreat, 1976-1993 |
title_full |
Controls on Calving Rate and Basal Sliding: Observations from Columbia Glacier, Alaska, Prior to and During its Rapid Retreat, 1976-1993 |
title_fullStr |
Controls on Calving Rate and Basal Sliding: Observations from Columbia Glacier, Alaska, Prior to and During its Rapid Retreat, 1976-1993 |
title_full_unstemmed |
Controls on Calving Rate and Basal Sliding: Observations from Columbia Glacier, Alaska, Prior to and During its Rapid Retreat, 1976-1993 |
title_sort |
controls on calving rate and basal sliding: observations from columbia glacier, alaska, prior to and during its rapid retreat, 1976-1993 |
publisher |
Byrd Polar Research Center, The Ohio State University. |
publishDate |
1995 |
url |
http://hdl.handle.net/1811/38768 |
genre |
glacier glaciers Polar Research Alaska |
genre_facet |
glacier glaciers Polar Research Alaska |
op_relation |
Report (Byrd Polar Research Center) no. 11 van der Veen, C.J. 1995. Controls on Calving Rate and Basal Sliding: Observations from Columbia Glacier, Alaska, Prior to and During its Rapid Retreat, 1976-1993. Byrd Polar Research Center Report No. 11, Byrd Polar Research Center, The Ohio State University, 72 pages. 0896-2472 http://hdl.handle.net/1811/38768 |
_version_ |
1766008173546700800 |