Ice Flow and Morphology of Prestrud Inlet and Western Sulzberger Ice Shelf, West Antarctica
Authors: Bohlander J.; Scambos T.A.
Source: Polar Geography, Volume 26, Number 3, 1 July 2002 , pp. 227-234(8)
Publisher: Taylor and Francis Ltd
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Abstract:
Ice velocity measurements for the period 1986–1989 are derived from three pairs of Landsat images covering the Prestrud Inlet and western Sulzberger Ice Shelf, West Antarctica. An image cross-correlation technique is used to track surface features and determine ice displacement. Maximum speed for the Prestrud Inlet during this period is 170 ± 25 ma-1. Similar speeds are found for Kiel Glacier, the primary source of ice flowing into the Prestrud. Streakline relationships between Ross Ice Shelf flow and flow from Prestrud Inlet suggest little change in relative flux over the past few centuries. The western Sulzberger Ice Shelf divides into two outlet regions. Maximum ice speed in the westernmost outlet is 307 ± 25 ma-1. The eastern outlet has speeds near 80–100 ma-1. Comparisons with vectors from previous studies indicate little change in velocity since 1972 for the Sulzberger. This study found no evidence of melt ponds in the Landsat image record, although surface melting does occur.Document Type: Research article
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