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Velocities of Pine Island and Thwaites Glaciers, West Antarctica, from ERS-1 SAR images

European Space Agency, (Special Publication) ESA SP

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Abstract

Average velocities of Pine Island and Thwaites Glaciers were measured for the time periods between 1992 and 1994 by tracking ice-surface patterns. Velocities of the central flow of the Pine Island Glacier range from 1.5 km/yr above the grounding line (separating the grounded from the floating parts of a glacier) to 2.8 km/yr near the terminus; velocities of the central Thwaites Glacier range from 2.2 km/yr above the grounding line to 3.4 km/yr at the limit of measurements on the tongue. Both glaciers show an increase in velocity of about 1 km/yr where they cross their grounding lines. The velocities derived from ERS-1 images are higher than those previously derived from Landsat images, perhaps reflecting acceleration of the glaciers. Both glaciers are exceptionally fast. The high velocities may be due to high precipitation rates over West Antarctica and the lack of a major buttressing ice shelf.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Velocities of Pine Island and Thwaites Glaciers, West Antarctica, from ERS-1 SAR images
Series title:
European Space Agency, (Special Publication) ESA SP
Issue:
414 PART 2
Year Published:
1997
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
European Space Agency, (Special Publication) ESA SP
First page:
819
Last page:
824
Number of Pages:
6