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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Bibliographic Details
Main Author: Hodge,Steven M.
Other Authors: WASHINGTON UNIV SEATTLE DEPT OF ATMOSPHERIC SCIENCES
Format: Text
Language:English
Published: 1972
Subjects:
Snow
Ice and Permafrost
(*GLACIERS
MOTION)
(*WASHINGTON(STATE)
GLACIERS)
ICE
THICKNESS
VELOCITY
DEFORMATION
PERIODIC VARIATIONS
TRIANGULATION
DENSITY
METEOROLOGICAL PHENOMENA
SHEAR STRESSES
NAVAL RESEARCH
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/AD0752194
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0752194
Description
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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