The Movement and Basal Sliding of the Nisqually Glacier, Mount Rainier
Detailed measurements of surface velocities along the centerline of the lower Nisqually Glacier, Mount Rainier, Washington, were made on the average of every 12 days for a period of 2 days. Changes in surface velocity, surface slope, and ice thickness were calculated. Surface velocities were related...
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Format: | Text |
Language: | English |
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1972
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Online Access: | http://www.dtic.mil/docs/citations/AD0752194 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0752194 |
Summary: | Detailed measurements of surface velocities along the centerline of the lower Nisqually Glacier, Mount Rainier, Washington, were made on the average of every 12 days for a period of 2 days. Changes in surface velocity, surface slope, and ice thickness were calculated. Surface velocities were related to sliding velocities at the bed through a glacier flow model. It was found that internal deformation within the ice accounts for less than half of its observed surface motion. Internal deformation contributes progressively less with distance up-glacier and, near the equilibrium line, sliding probably accounts for 80-90% of the observed motion. (Author) |
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