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 sub-gl...
Published in: | Annals of Glaciology |
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2016
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Online Access: | https://hdl.handle.net/1983/ab942d94-5e3b-4419-92a5-603014976fea https://research-information.bris.ac.uk/en/publications/ab942d94-5e3b-4419-92a5-603014976fea https://doi.org/10.1017/aog.2016.27 https://research-information.bris.ac.uk/ws/files/107825157/impact_of_ocean_forcing_on_the_aurora_basin_in_the_21st_and_22nd_centuries.pdf |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/ab942d94-5e3b-4419-92a5-603014976fea 2024-01-28T09:58:28+01:00 Impact of ocean forcing on the Aurora Basin in the 21st and 22nd centuries Sun, Sainan Cornford, Stephen Gwyther, David Gladstone, Rupert Galton-Fenzi, Benjamin Zhao, Liyun Moore, John C. 2016-10 application/pdf https://hdl.handle.net/1983/ab942d94-5e3b-4419-92a5-603014976fea https://research-information.bris.ac.uk/en/publications/ab942d94-5e3b-4419-92a5-603014976fea https://doi.org/10.1017/aog.2016.27 https://research-information.bris.ac.uk/ws/files/107825157/impact_of_ocean_forcing_on_the_aurora_basin_in_the_21st_and_22nd_centuries.pdf eng eng info:eu-repo/semantics/openAccess Sun , S , Cornford , S , Gwyther , D , Gladstone , R , Galton-Fenzi , B , Zhao , L & Moore , J C 2016 , ' Impact of ocean forcing on the Aurora Basin in the 21st and 22nd centuries ' , Annals of Glaciology , vol. 57 , no. 73 , pp. 79-86 . https://doi.org/10.1017/aog.2016.27 article 2016 ftubristolcris https://doi.org/10.1017/aog.2016.27 2024-01-04T23:49:30Z 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 sub-glacial 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 to 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 to 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 about 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 Annals of Glaciology Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves University of Bristol: Bristol Research 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 |
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Open Polar |
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University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
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 sub-glacial 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 to 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 to 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 about 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, Sainan Cornford, Stephen Gwyther, David Gladstone, Rupert Galton-Fenzi, Benjamin Zhao, Liyun Moore, John C. |
spellingShingle |
Sun, Sainan Cornford, Stephen Gwyther, David Gladstone, Rupert Galton-Fenzi, Benjamin Zhao, Liyun Moore, John C. Impact of ocean forcing on the Aurora Basin in the 21st and 22nd centuries |
author_facet |
Sun, Sainan Cornford, Stephen Gwyther, David Gladstone, Rupert Galton-Fenzi, Benjamin Zhao, Liyun Moore, John C. |
author_sort |
Sun, Sainan |
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 |
publishDate |
2016 |
url |
https://hdl.handle.net/1983/ab942d94-5e3b-4419-92a5-603014976fea https://research-information.bris.ac.uk/en/publications/ab942d94-5e3b-4419-92a5-603014976fea https://doi.org/10.1017/aog.2016.27 https://research-information.bris.ac.uk/ws/files/107825157/impact_of_ocean_forcing_on_the_aurora_basin_in_the_21st_and_22nd_centuries.pdf |
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 Annals of Glaciology Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves |
genre_facet |
Amundsen Sea Annals of Glaciology Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves |
op_source |
Sun , S , Cornford , S , Gwyther , D , Gladstone , R , Galton-Fenzi , B , Zhao , L & Moore , J C 2016 , ' Impact of ocean forcing on the Aurora Basin in the 21st and 22nd centuries ' , Annals of Glaciology , vol. 57 , no. 73 , pp. 79-86 . https://doi.org/10.1017/aog.2016.27 |
op_rights |
info:eu-repo/semantics/openAccess |
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 |
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1789327095786110976 |