Pathways of basal meltwater from Antarctic ice shelves: a model study
We investigate spreading pathways of basal meltwater released from all Antarctic ice shelves using a circumpolar coupled ice shelf-sea ice-ocean model that reproduces major features of the Southern Ocean circulation, including the Antarctic Circumpolar Current (ACC). Several independent virtual trac...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://doi.org/10.1002/2014JC009915 http://ecite.utas.edu.au/109884 |
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ftunivtasecite:oai:ecite.utas.edu.au:109884 2023-05-15T14:03:26+02:00 Pathways of basal meltwater from Antarctic ice shelves: a model study Kusahara, K Hasumi, H 2014 application/pdf https://doi.org/10.1002/2014JC009915 http://ecite.utas.edu.au/109884 en eng Wiley-Blackwell Publishing, Inc. http://ecite.utas.edu.au/109884/1/Kusahara_JGR_2014.pdf http://dx.doi.org/10.1002/2014JC009915 Kusahara, K and Hasumi, H, Pathways of basal meltwater from Antarctic ice shelves: a model study, Journal of Geophysical Research: Oceans, 119, (9) pp. 5690-5704. ISSN 2169-9275 (2014) [Refereed Article] http://ecite.utas.edu.au/109884 Earth Sciences Atmospheric Sciences Climate Change Processes Refereed Article PeerReviewed 2014 ftunivtasecite https://doi.org/10.1002/2014JC009915 2019-12-13T22:10:32Z We investigate spreading pathways of basal meltwater released from all Antarctic ice shelves using a circumpolar coupled ice shelf-sea ice-ocean model that reproduces major features of the Southern Ocean circulation, including the Antarctic Circumpolar Current (ACC). Several independent virtual tracers are used to identify detailed pathways of basal meltwaters. The spreading pathways of the meltwater tracers depend on formation sites, because the meltwaters are transported by local ambient ocean circulation. Meltwaters from ice shelves in the Weddell and Amundsen-Bellingshausen Seas in surface/subsurface layers are effectively advected to lower latitudes with the ACC. Although a large portion of the basal meltwaters is present in surface and subsurface layers, a part of the basal meltwaters penetrates into the bottom layer through active dense water formation along the Antarctic coastal margins. The signals at the seafloor extend along the topography, showing a horizontal distribution similar to the observed spreading of Antarctic Bottom Water. Meltwaters originating from ice shelves in the Weddell and Ross Seas and in the Indian sector significantly contribute to the bottom signals. A series of numerical experiments in which thermodynamic interaction between the ice shelf and ocean is neglected regionally demonstrates that the basal meltwater of each ice shelf impacts sea ice and/or ocean thermohaline circulation in the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Ice Shelf Ice Shelves Sea ice Southern Ocean eCite UTAS (University of Tasmania) Antarctic Indian Southern Ocean The Antarctic Weddell Journal of Geophysical Research: Oceans 119 9 5690 5704 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Atmospheric Sciences Climate Change Processes |
spellingShingle |
Earth Sciences Atmospheric Sciences Climate Change Processes Kusahara, K Hasumi, H Pathways of basal meltwater from Antarctic ice shelves: a model study |
topic_facet |
Earth Sciences Atmospheric Sciences Climate Change Processes |
description |
We investigate spreading pathways of basal meltwater released from all Antarctic ice shelves using a circumpolar coupled ice shelf-sea ice-ocean model that reproduces major features of the Southern Ocean circulation, including the Antarctic Circumpolar Current (ACC). Several independent virtual tracers are used to identify detailed pathways of basal meltwaters. The spreading pathways of the meltwater tracers depend on formation sites, because the meltwaters are transported by local ambient ocean circulation. Meltwaters from ice shelves in the Weddell and Amundsen-Bellingshausen Seas in surface/subsurface layers are effectively advected to lower latitudes with the ACC. Although a large portion of the basal meltwaters is present in surface and subsurface layers, a part of the basal meltwaters penetrates into the bottom layer through active dense water formation along the Antarctic coastal margins. The signals at the seafloor extend along the topography, showing a horizontal distribution similar to the observed spreading of Antarctic Bottom Water. Meltwaters originating from ice shelves in the Weddell and Ross Seas and in the Indian sector significantly contribute to the bottom signals. A series of numerical experiments in which thermodynamic interaction between the ice shelf and ocean is neglected regionally demonstrates that the basal meltwater of each ice shelf impacts sea ice and/or ocean thermohaline circulation in the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Kusahara, K Hasumi, H |
author_facet |
Kusahara, K Hasumi, H |
author_sort |
Kusahara, K |
title |
Pathways of basal meltwater from Antarctic ice shelves: a model study |
title_short |
Pathways of basal meltwater from Antarctic ice shelves: a model study |
title_full |
Pathways of basal meltwater from Antarctic ice shelves: a model study |
title_fullStr |
Pathways of basal meltwater from Antarctic ice shelves: a model study |
title_full_unstemmed |
Pathways of basal meltwater from Antarctic ice shelves: a model study |
title_sort |
pathways of basal meltwater from antarctic ice shelves: a model study |
publisher |
Wiley-Blackwell Publishing, Inc. |
publishDate |
2014 |
url |
https://doi.org/10.1002/2014JC009915 http://ecite.utas.edu.au/109884 |
geographic |
Antarctic Indian Southern Ocean The Antarctic Weddell |
geographic_facet |
Antarctic Indian Southern Ocean The Antarctic Weddell |
genre |
Antarc* Antarctic Ice Shelf Ice Shelves Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Shelf Ice Shelves Sea ice Southern Ocean |
op_relation |
http://ecite.utas.edu.au/109884/1/Kusahara_JGR_2014.pdf http://dx.doi.org/10.1002/2014JC009915 Kusahara, K and Hasumi, H, Pathways of basal meltwater from Antarctic ice shelves: a model study, Journal of Geophysical Research: Oceans, 119, (9) pp. 5690-5704. ISSN 2169-9275 (2014) [Refereed Article] http://ecite.utas.edu.au/109884 |
op_doi |
https://doi.org/10.1002/2014JC009915 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
119 |
container_issue |
9 |
container_start_page |
5690 |
op_container_end_page |
5704 |
_version_ |
1766274091237507072 |