Baerbel K. Lucchitta
Jane G. Ferrigno
Christina E. Rosanova
1998
<p><span>Average velocities for time intervals ranging from < 1 to 15 years were measured by tracking ice-surface patterns on sequential Landsat and European Remote-sensing Satellite synthetic aperture radar images. Velocities ofThwaites Glacier range from 2.2 km a</span><span class="sup">−1</span><span> above the grounding line to 3.4 km a</span><span class="sup">−1</span><span> at the limit of measurements onThwaites Glacier ice tongue. The glacier increases in velocity by about 1 km a</span><span class="sup">−1</span><span> where it crosses the grounding line. Over the period 1984-93, Thwaites Glacier ice tongue accelerated by about 0.6 kin a .Velocities of the floating part of several minor glaciers and some ice shelves are also determined: Land Glacier, 17—1.9 km a</span><span class="sup">−1</span><span> ; DeVicq Glacier, 0.7-1.1 km a</span><span class="sup">−1</span><span>; Dotson Ice Shelf 0.2-0.5 km a</span><span class="sup">−1</span><span>; Gctz Ice Shelf, 0.2-0.8 km a</span><span class="sup">−1</span><span>; and Sulzberger Ice Shelf, 0.01 -0.02 km a</span><span class="sup">−1</span><span>. The high velocities along the Marie Byrd Land coast are consistent with the high precipitation rates over West Antarctica and, for some of the glaciers, the lack of buttressing ice shelves.</span></p>
application/pdf
10.3189/1998AoG27-1-47-53
en
Cambridge University Press
Velocities of the Pine Island, Thwaites, and smaller glaciers along the Marie Byrd Land coast, West Antarctica
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