Ocean forced variability of Totten Glacier mass loss-Reference-Cited by-同舟云学术

Ocean forced variability of Totten Glacier mass loss

Published:2017-08-23 Issue:1 Volume:461 Page:175-186
ISSN:0305-8719
Container-title:Geological Society, London, Special Publications
language:en
Short-container-title:Geological Society, London, Special Publications

Author:

Roberts Jason¹²,Galton-Fenzi Benjamin K.¹²,Paolo Fernando S.³,Donnelly Claire⁴,Gwyther David E.²⁵,Padman Laurie⁶,Young Duncan⁷,Warner Roland²,Greenbaum Jamin⁷,Fricker Helen A.³,Payne Antony J.⁴,Cornford Stephen⁴,Le Brocq Anne⁸,van Ommen Tas¹²,Blankenship Don⁷,Siegert Martin J.⁹

Affiliation:

1. Australian Antarctic Division, Hobart, Tasmania, Australia

2. Antarctic Climate & Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, Tasmania, Australia

3. Scripps Institution of Oceanography, University of California San Diego, La Jolla, California, USA

4. School of Geographical Sciences, University of Bristol, Bristol, UK

5. Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia

6. Earth & Space Research, Corvallis, Oregon, USA

7. Jackson School of Geosciences, University of Texas at Austin, Austin, Texas, USA

8. School of Geography, University of Exeter, Exeter, Devon, UK

9. Grantham Institute and Department of Earth Science and Engineering, Imperial College London, South Kensington, London, UK

Abstract

AbstractA 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 that the surface velocity and height of the floating part of the 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 that ice flow and thickness respond to both basal melting of the ice shelf and grounding on bed obstacles. We conclude the observed variability of the TG is primarily ocean-driven. Ocean warming in this region will lead to enhanced ice-sheet dynamism and loss of upstream grounded ice.

Publisher

Geological Society of London

Subject

Geology,Ocean Engineering,Water Science and Technology

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