Circum-Antarctic shoreward heat transport derived from an eddy- and tide-resolving simulation
Almost all heat reaching the bases of Antarctica's ice shelves originates from warm Circumpolar Deep Water in the open Southern Ocean. This study quantifies the roles of mean and transient flows in transporting heat across almost the entire Antarctic continental slope and shelf using an ocean/s...
Published in: | Geophysical Research Letters |
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Language: | English |
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Amer Geophysical Union
2018
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Online Access: | https://eprints.utas.edu.au/39176/ https://eprints.utas.edu.au/39176/1/123890%20final.pdf https://doi.org/10.1002/2017GL075677 |
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ftunivtasmania:oai:eprints.utas.edu.au:39176 2023-05-15T13:42:39+02:00 Circum-Antarctic shoreward heat transport derived from an eddy- and tide-resolving simulation Stewart, AL Klocker, A Menemenlis, D 2018 application/pdf https://eprints.utas.edu.au/39176/ https://eprints.utas.edu.au/39176/1/123890%20final.pdf https://doi.org/10.1002/2017GL075677 en eng Amer Geophysical Union https://eprints.utas.edu.au/39176/1/123890%20final.pdf Stewart, AL, Klocker, A orcid:0000-0002-2038-7922 and Menemenlis, D 2018 , 'Circum-Antarctic shoreward heat transport derived from an eddy- and tide-resolving simulation' , Geophysical Research Letters, vol. 45, no. 2 , pp. 834-845 , doi:10.1002/2017GL075677 <http://dx.doi.org/10.1002/2017GL075677>. Antarrctic margins tides eddies heat transport Article PeerReviewed 2018 ftunivtasmania https://doi.org/10.1002/2017GL075677 2021-12-13T23:18:15Z Almost all heat reaching the bases of Antarctica's ice shelves originates from warm Circumpolar Deep Water in the open Southern Ocean. This study quantifies the roles of mean and transient flows in transporting heat across almost the entire Antarctic continental slope and shelf using an ocean/sea ice model run at eddy- and tide-resolving (1/48°) horizontal resolution. Heat transfer by transient flows is approximately attributed to eddies and tides via a decomposition into time scales shorter than and longer than 1 day, respectively. It is shown that eddies transfer heat across the continental slope (ocean depths greater than 1,500 m), but tides produce a stronger shoreward heat flux across the shelf break (ocean depths between 500 m and 1,000 m). However, the tidal heat fluxes are approximately compensated by mean flows, leaving the eddy heat flux to balance the net shoreward heat transport. The eddy-driven cross-slope overturning circulation is too weak to account for the eddy heat flux. This suggests that isopycnal eddy stirring is the principal mechanism of shoreward heat transport around Antarctica, though likely modulated by tides and surface forcing. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelves Sea ice Southern Ocean University of Tasmania: UTas ePrints Antarctic Southern Ocean Geophysical Research Letters 45 2 834 845 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Antarrctic margins tides eddies heat transport |
spellingShingle |
Antarrctic margins tides eddies heat transport Stewart, AL Klocker, A Menemenlis, D Circum-Antarctic shoreward heat transport derived from an eddy- and tide-resolving simulation |
topic_facet |
Antarrctic margins tides eddies heat transport |
description |
Almost all heat reaching the bases of Antarctica's ice shelves originates from warm Circumpolar Deep Water in the open Southern Ocean. This study quantifies the roles of mean and transient flows in transporting heat across almost the entire Antarctic continental slope and shelf using an ocean/sea ice model run at eddy- and tide-resolving (1/48°) horizontal resolution. Heat transfer by transient flows is approximately attributed to eddies and tides via a decomposition into time scales shorter than and longer than 1 day, respectively. It is shown that eddies transfer heat across the continental slope (ocean depths greater than 1,500 m), but tides produce a stronger shoreward heat flux across the shelf break (ocean depths between 500 m and 1,000 m). However, the tidal heat fluxes are approximately compensated by mean flows, leaving the eddy heat flux to balance the net shoreward heat transport. The eddy-driven cross-slope overturning circulation is too weak to account for the eddy heat flux. This suggests that isopycnal eddy stirring is the principal mechanism of shoreward heat transport around Antarctica, though likely modulated by tides and surface forcing. |
format |
Article in Journal/Newspaper |
author |
Stewart, AL Klocker, A Menemenlis, D |
author_facet |
Stewart, AL Klocker, A Menemenlis, D |
author_sort |
Stewart, AL |
title |
Circum-Antarctic shoreward heat transport derived from an eddy- and tide-resolving simulation |
title_short |
Circum-Antarctic shoreward heat transport derived from an eddy- and tide-resolving simulation |
title_full |
Circum-Antarctic shoreward heat transport derived from an eddy- and tide-resolving simulation |
title_fullStr |
Circum-Antarctic shoreward heat transport derived from an eddy- and tide-resolving simulation |
title_full_unstemmed |
Circum-Antarctic shoreward heat transport derived from an eddy- and tide-resolving simulation |
title_sort |
circum-antarctic shoreward heat transport derived from an eddy- and tide-resolving simulation |
publisher |
Amer Geophysical Union |
publishDate |
2018 |
url |
https://eprints.utas.edu.au/39176/ https://eprints.utas.edu.au/39176/1/123890%20final.pdf https://doi.org/10.1002/2017GL075677 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica Ice Shelves Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelves Sea ice Southern Ocean |
op_relation |
https://eprints.utas.edu.au/39176/1/123890%20final.pdf Stewart, AL, Klocker, A orcid:0000-0002-2038-7922 and Menemenlis, D 2018 , 'Circum-Antarctic shoreward heat transport derived from an eddy- and tide-resolving simulation' , Geophysical Research Letters, vol. 45, no. 2 , pp. 834-845 , doi:10.1002/2017GL075677 <http://dx.doi.org/10.1002/2017GL075677>. |
op_doi |
https://doi.org/10.1002/2017GL075677 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
2 |
container_start_page |
834 |
op_container_end_page |
845 |
_version_ |
1766170762378477568 |