Accession Number:

AD0752194

Title:

The Movement and Basal Sliding of the Nisqually Glacier, Mount Rainier,

Descriptive Note:

Corporate Author:

WASHINGTON UNIV SEATTLE DEPT OF ATMOSPHERIC SCIENCES

Personal Author(s):

• Hodge,Steven M.

Report Date:

1972-08-01

Pagination or Media Count:

438.0

Abstract:

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

Descriptors:

• (*GLACIERS
• MOTION)
• (*WASHINGTON(STATE)
• GLACIERS)
• ICE
• THICKNESS
• VELOCITY
• DEFORMATION
• PERIODIC VARIATIONS
• TRIANGULATION
• SNOW
• DENSITY
• METEOROLOGICAL PHENOMENA
• SHEAR STRESSES
• NAVAL RESEARCH

Subject Categories:

• Snow, Ice and Permafrost

Distribution Statement:

APPROVED FOR PUBLIC RELEASE