First Advisor

Andrew G. Fountain

Date of Publication

2007

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Geography

Department

Geography

Language

English

Subjects

Rock glaciers -- Oregon -- Mount Hood, Kinematics, Cascade Range, Pacific Northwest

DOI

10.15760/etd.6010

Physical Description

1 online resource (124 p.)

Abstract

Eliot Glacier is a small (1.6 km2), relatively well-studied glacier on Mount Hood, Oregon. Since 1901, glacier area decreased from 2.03 ± 0.16 km2 to 1.64 ± 0.05 km2 by 2004, a loss of 19%, and the terminus retreated about 600 m. Mount Hood's glaciers as a whole have lost 34% of their area. During the first part of the 20th century the glacier thinned and retreated, then thickened and advanced between the 1940s and 1960s because of cooler temperatures and increased winter precipitation and has since accelerated its retreat, averaging about 1.0 m a-1 thinning and a 20 m a-1 retreat rate by 2004. Surface velocities at a transverse profile reflect ice thickness over time, reaching a low of 1.4 m a-1 in 1949 before increasing to 6.9 ± 1.7 m a-1 from the 1960s to the 1980s. Velocities have since slowed to about 2.3 m a-1 , about the 1940 speed.

Rights

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Comments

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Persistent Identifier

http://archives.pdx.edu/ds/psu/23740

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