Impact of ocean forcing on the Aurora Basin in the 21st and 22nd centuries
The grounded ice in the Totten and Dalton glaciers is an essential component of the buttressing for the marine-based Aurora basin, and hence their stability is important to the future rate of mass loss from East Antarctica. Totten and Vanderford glaciers are joined by a deep east-west running subgla...
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Cambridge University Press
2016
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Online Access: | https://espace.library.uq.edu.au/view/UQ:3888ff9 |
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:3888ff9 2023-05-15T13:24:08+02:00 Impact of ocean forcing on the Aurora Basin in the 21st and 22nd centuries Sun, S. Cornford, S. L. Gwyther, D. E. Gladstone, R. M. Galton-Fenzi, B. K. Zhao, L. Moore, J. C. 2016-09-01 https://espace.library.uq.edu.au/view/UQ:3888ff9 eng eng Cambridge University Press doi:10.1017/aog.2016.27 issn:0260-3055 issn:1727-5644 orcid:0000-0002-7218-2785 212400240 41506212 2012\CB957702 2015CB953601 2015CB953602 Not set cpom30001 Ice-sheet modelling Atmosphere/ice/ocean interactions Journal Article 2016 ftunivqespace https://doi.org/10.1017/aog.2016.27 2020-12-08T07:42:30Z The grounded ice in the Totten and Dalton glaciers is an essential component of the buttressing for the marine-based Aurora basin, and hence their stability is important to the future rate of mass loss from East Antarctica. Totten and Vanderford glaciers are joined by a deep east-west running subglacial trench between the continental ice sheet and Law Dome, while a shallower trench links the Totten and Dalton glaciers. All three glaciers flow into the ocean close to the Antarctic circle and experience ocean-driven ice shelf melt rates comparable with the Amundsen Sea Embayment. We investigate this combination of trenches and ice shelves with the BISICLES adaptive mesh ice-sheet model and ocean-forcing melt rates derived from two global climate models. We find that ice shelf ablation at a rate comparable with the present day is sufficient to cause widespread grounding line retreat in an east-west direction across Totten and Dalton glaciers, with projected future warming causing faster retreat. Meanwhile, southward retreat is limited by the shallower ocean facing slopes between the coast and the bulk of the Aurora sub-glacial trench. However the two climate models produce completely different future ice shelf basal melt rates in this region: HadCM3 drives increasing sub-ice shelf melting to ~2150, while ECHAM5 shows little or no increase in sub-ice shelf melting under the two greenhouse gas forcing scenarios. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves The University of Queensland: UQ eSpace Amundsen Sea Antarctic East Antarctica Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) The Antarctic Annals of Glaciology 57 73 79 86 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Ice-sheet modelling Atmosphere/ice/ocean interactions |
spellingShingle |
Ice-sheet modelling Atmosphere/ice/ocean interactions Sun, S. Cornford, S. L. Gwyther, D. E. Gladstone, R. M. Galton-Fenzi, B. K. Zhao, L. Moore, J. C. Impact of ocean forcing on the Aurora Basin in the 21st and 22nd centuries |
topic_facet |
Ice-sheet modelling Atmosphere/ice/ocean interactions |
description |
The grounded ice in the Totten and Dalton glaciers is an essential component of the buttressing for the marine-based Aurora basin, and hence their stability is important to the future rate of mass loss from East Antarctica. Totten and Vanderford glaciers are joined by a deep east-west running subglacial trench between the continental ice sheet and Law Dome, while a shallower trench links the Totten and Dalton glaciers. All three glaciers flow into the ocean close to the Antarctic circle and experience ocean-driven ice shelf melt rates comparable with the Amundsen Sea Embayment. We investigate this combination of trenches and ice shelves with the BISICLES adaptive mesh ice-sheet model and ocean-forcing melt rates derived from two global climate models. We find that ice shelf ablation at a rate comparable with the present day is sufficient to cause widespread grounding line retreat in an east-west direction across Totten and Dalton glaciers, with projected future warming causing faster retreat. Meanwhile, southward retreat is limited by the shallower ocean facing slopes between the coast and the bulk of the Aurora sub-glacial trench. However the two climate models produce completely different future ice shelf basal melt rates in this region: HadCM3 drives increasing sub-ice shelf melting to ~2150, while ECHAM5 shows little or no increase in sub-ice shelf melting under the two greenhouse gas forcing scenarios. |
format |
Article in Journal/Newspaper |
author |
Sun, S. Cornford, S. L. Gwyther, D. E. Gladstone, R. M. Galton-Fenzi, B. K. Zhao, L. Moore, J. C. |
author_facet |
Sun, S. Cornford, S. L. Gwyther, D. E. Gladstone, R. M. Galton-Fenzi, B. K. Zhao, L. Moore, J. C. |
author_sort |
Sun, S. |
title |
Impact of ocean forcing on the Aurora Basin in the 21st and 22nd centuries |
title_short |
Impact of ocean forcing on the Aurora Basin in the 21st and 22nd centuries |
title_full |
Impact of ocean forcing on the Aurora Basin in the 21st and 22nd centuries |
title_fullStr |
Impact of ocean forcing on the Aurora Basin in the 21st and 22nd centuries |
title_full_unstemmed |
Impact of ocean forcing on the Aurora Basin in the 21st and 22nd centuries |
title_sort |
impact of ocean forcing on the aurora basin in the 21st and 22nd centuries |
publisher |
Cambridge University Press |
publishDate |
2016 |
url |
https://espace.library.uq.edu.au/view/UQ:3888ff9 |
long_lat |
ENVELOPE(112.833,112.833,-66.733,-66.733) |
geographic |
Amundsen Sea Antarctic East Antarctica Law Dome The Antarctic |
geographic_facet |
Amundsen Sea Antarctic East Antarctica Law Dome The Antarctic |
genre |
Amundsen Sea Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves |
op_relation |
doi:10.1017/aog.2016.27 issn:0260-3055 issn:1727-5644 orcid:0000-0002-7218-2785 212400240 41506212 2012\CB957702 2015CB953601 2015CB953602 Not set cpom30001 |
op_doi |
https://doi.org/10.1017/aog.2016.27 |
container_title |
Annals of Glaciology |
container_volume |
57 |
container_issue |
73 |
container_start_page |
79 |
op_container_end_page |
86 |
_version_ |
1766377664633896960 |