Ocean forced variability of Totten Glacier mass loss
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 that the surface velocity and height of the floating part of the TG, which buttresses the grounded com...
Published in: | Geological Society, London, Special Publications |
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Format: | Article in Journal/Newspaper |
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2017
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Online Access: | https://eprints.utas.edu.au/25611/ https://eprints.utas.edu.au/25611/2/120525%20final.pdf https://eprints.utas.edu.au/25611/1/SP461.6.full.pdf https://doi.org/10.1144/SP461.6 |
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ftunivtasmania:oai:eprints.utas.edu.au:25611 2023-05-15T13:31:52+02:00 Ocean forced variability of Totten Glacier mass loss Roberts, J Galton-Fenzi, BK Paolo, FS Donnelly, C Gwyther, DE Padman, L Young, D Warner, R Greenbaum, J Fricker, HA Payne, AJ Cornford, S Le Brocq, A van Ommen, T Blankenship, D Siegert, MJ 2017 application/pdf https://eprints.utas.edu.au/25611/ https://eprints.utas.edu.au/25611/2/120525%20final.pdf https://eprints.utas.edu.au/25611/1/SP461.6.full.pdf https://doi.org/10.1144/SP461.6 en eng Geological Society Publishing House https://eprints.utas.edu.au/25611/2/120525%20final.pdf https://eprints.utas.edu.au/25611/1/SP461.6.full.pdf Roberts, J, Galton-Fenzi, BK, Paolo, FS, Donnelly, C, Gwyther, DE orcid:0000-0002-7218-2785 , Padman, L, Young, D, Warner, R orcid:0000-0002-9778-3544 , Greenbaum, J, Fricker, HA, Payne, AJ, Cornford, S, Le Brocq, A, van Ommen, T orcid:0000-0002-2463-1718 , Blankenship, D and Siegert, MJ 2017 , 'Ocean forced variability of Totten Glacier mass loss' , Geological Society Special Publication, vol. 461 , pp. 175-186 , doi:10.1144/SP461.6 <http://dx.doi.org/10.1144/SP461.6>. Antarctica melting Totten Glacier pinning glaciology ice shelf Article PeerReviewed 2017 ftunivtasmania https://doi.org/10.1144/SP461.6 2021-09-06T22:17:49Z 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 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. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Totten Glacier University of Tasmania: UTas ePrints Antarctic East Antarctic Ice Sheet Totten Glacier ENVELOPE(116.333,116.333,-66.833,-66.833) Geological Society, London, Special Publications 461 1 175 186 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Antarctica melting Totten Glacier pinning glaciology ice shelf |
spellingShingle |
Antarctica melting Totten Glacier pinning glaciology ice shelf Roberts, J Galton-Fenzi, BK Paolo, FS Donnelly, C Gwyther, DE Padman, L Young, D Warner, R Greenbaum, J Fricker, HA Payne, AJ Cornford, S Le Brocq, A van Ommen, T Blankenship, D Siegert, MJ Ocean forced variability of Totten Glacier mass loss |
topic_facet |
Antarctica melting Totten Glacier pinning glaciology ice shelf |
description |
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 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. |
format |
Article in Journal/Newspaper |
author |
Roberts, J Galton-Fenzi, BK Paolo, FS Donnelly, C Gwyther, DE Padman, L Young, D Warner, R Greenbaum, J Fricker, HA Payne, AJ Cornford, S Le Brocq, A van Ommen, T Blankenship, D Siegert, MJ |
author_facet |
Roberts, J Galton-Fenzi, BK Paolo, FS Donnelly, C Gwyther, DE Padman, L Young, D Warner, R Greenbaum, J Fricker, HA Payne, AJ Cornford, S Le Brocq, A van Ommen, T Blankenship, D Siegert, MJ |
author_sort |
Roberts, J |
title |
Ocean forced variability of Totten Glacier mass loss |
title_short |
Ocean forced variability of Totten Glacier mass loss |
title_full |
Ocean forced variability of Totten Glacier mass loss |
title_fullStr |
Ocean forced variability of Totten Glacier mass loss |
title_full_unstemmed |
Ocean forced variability of Totten Glacier mass loss |
title_sort |
ocean forced variability of totten glacier mass loss |
publisher |
Geological Society Publishing House |
publishDate |
2017 |
url |
https://eprints.utas.edu.au/25611/ https://eprints.utas.edu.au/25611/2/120525%20final.pdf https://eprints.utas.edu.au/25611/1/SP461.6.full.pdf https://doi.org/10.1144/SP461.6 |
long_lat |
ENVELOPE(116.333,116.333,-66.833,-66.833) |
geographic |
Antarctic East Antarctic Ice Sheet Totten Glacier |
geographic_facet |
Antarctic East Antarctic Ice Sheet Totten Glacier |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Totten Glacier |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Totten Glacier |
op_relation |
https://eprints.utas.edu.au/25611/2/120525%20final.pdf https://eprints.utas.edu.au/25611/1/SP461.6.full.pdf Roberts, J, Galton-Fenzi, BK, Paolo, FS, Donnelly, C, Gwyther, DE orcid:0000-0002-7218-2785 , Padman, L, Young, D, Warner, R orcid:0000-0002-9778-3544 , Greenbaum, J, Fricker, HA, Payne, AJ, Cornford, S, Le Brocq, A, van Ommen, T orcid:0000-0002-2463-1718 , Blankenship, D and Siegert, MJ 2017 , 'Ocean forced variability of Totten Glacier mass loss' , Geological Society Special Publication, vol. 461 , pp. 175-186 , doi:10.1144/SP461.6 <http://dx.doi.org/10.1144/SP461.6>. |
op_doi |
https://doi.org/10.1144/SP461.6 |
container_title |
Geological Society, London, Special Publications |
container_volume |
461 |
container_issue |
1 |
container_start_page |
175 |
op_container_end_page |
186 |
_version_ |
1766021711089631232 |