Ice flow direction change in interior West Antarctica

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 explanati...

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Bibliographic Details
Published in:Science
Main Authors: 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
Format: Article in Journal/Newspaper
Language:unknown
Published: American Association for the Advancement of Science 2004
Subjects:
Glaciology
West Antarctica
Byrd
Byrd Station
Antarc*
Antarctica
Online Access:http://nora.nerc.ac.uk/id/eprint/12419/
http://www.sciencemag.org/content/305/5692/1948.abstract
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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.

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