Skip to main content
U.S. flag

An official website of the United States government

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

January 1, 1997

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.

Citation Information

Publication Year 1997
Title Velocities of Pine Island and Thwaites Glaciers, West Antarctica, from ERS-1 SAR images
Authors B.K. Lucchitta, C.E. Rosanova
Publication Type Article
Publication Subtype Journal Article
Series Title European Space Agency, (Special Publication) ESA SP
Index ID 70019297
Record Source USGS Publications Warehouse