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Ice flow direction change in interior West Antarctica

Sigert, M.C.; Welch, B.; Morse, D.; Vieli, A.; Blankenship, D.D.; Joughin, I.; King, E.C.; Leysinger Vieli, G.J.-M.C.; Payne, A.J.; Jacobel, R.

Authors

M.C. Sigert

B. Welch

D. Morse

A. Vieli

D.D. Blankenship

I. Joughin

E.C. King

G.J.-M.C. Leysinger Vieli

A.J. Payne

R. Jacobel



Abstract

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 45- 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 È1500 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.

Citation

Sigert, M., Welch, B., Morse, D., Vieli, A., Blankenship, D., Joughin, I., …Jacobel, R. (2004). Ice flow direction change in interior West Antarctica. Science, 305(5692), 1948-1951. https://doi.org/10.1126/science.1101072

Journal Article Type Article
Publication Date Sep 1, 2004
Deposit Date Jan 20, 2009
Journal Science
Print ISSN 0036-8075
Electronic ISSN 1095-9203
Publisher American Association for the Advancement of Science
Peer Reviewed Peer Reviewed
Volume 305
Issue 5692
Pages 1948-1951
DOI https://doi.org/10.1126/science.1101072
Publisher URL http://www.sciencemag.org/cgi/reprint/305/5692/1948.pdf

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