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Ice flow direction change in interior West Antarctica

Siegert, Martin J.; Welch, Brian; Morse, David; Vieli, Andreas; Blankenship, Donald D.; Joughin, Ian; King, Edward C.; Leysinger Vieli, Gwendolyn J.-M.C.; Payne, Antony J.; Jacobel, Robert. 2004 Ice flow direction change in interior West Antarctica. Science, 305 (5692). 1948-1951. 10.1126/science.1101072

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Abstract/Summary

Upstream of Byrd Station (West Antarctica), ice-penetrating radar data reveal a distinctive fold structure within the ice, in which isochronous layers are unusually deep. The fold has an axis more than 50 kilometers long, which is aligned up to 45degrees to the ice flow direction. Although explanations for the fold's formation under the present flow are problematic, it can be explained if flow was parallel to the fold axis similar to 1500 years ago. This flow change may be associated with ice stream alterations nearer the margin. If this is true, central West Antarctica may respond to future alterations more than previously thought.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1126/science.1101072
Programmes: BAS Programmes > Antarctic Science in the Global Context (2000-2005) > Global Interactions of the Antarctic Ice Sheet
ISSN: 0036-8075
NORA Subject Terms: Glaciology
Date made live: 23 Feb 2012 14:04
URI: http://nora.nerc.ac.uk/id/eprint/12419

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