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Ocean forced variability of Totten Glacier mass loss

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)175-186
Number of pages12
JournalGeological Society Special Publications
Volume461
Early online date23 Aug 2017
DOIs
DateAccepted/In press - 20 Jan 2017
DateE-pub ahead of print - 23 Aug 2017
DatePublished (current) - 23 Aug 2017

Abstract

A large volume of the East Antarctic Ice Sheet drains through the Totten Glacier (TG) and is thought to be a potential source of substantial global sea level rise over the coming centuries. We show the surface velocity and height of the floating part of TG, which buttresses the grounded component, have varied substantially over two decades (1989–2011), with variations in surface height strongly anti-correlated with simulated basal melt rates (r=0.70, p<0.05). Coupled glacier/ice-shelf simulations confirm ice flow and thickness respond to both basal melting of the ice shelf and grounding on bed obstacles. We conclude the observed variability of TG is primarily ocean-driven. Ocean warming in this region will lead to enhanced ice-sheet dynamism and loss of upstream grounded ice.

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    Rights statement: This is the final published version of the article (version of record). It first appeared online via Geological Society at http://sp.lyellcollection.org/content/early/2017/08/22/SP461.6. Please refer to any applicable terms of use of the publisher.

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