Warm Circumpolar Deep Water transport toward Antarctica driven by local dense water export in canyons
Poleward transport of warm Circumpolar Deep Water (CDW) has been linked to melting of Antarctic ice shelves. However, even the steady-state spatial distribution and mechanisms of CDW transport remain poorly understood. Using a global, eddying ocean model, we explore the relationship between the cros...
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/219011 2024-01-14T10:01:33+01:00 Warm Circumpolar Deep Water transport toward Antarctica driven by local dense water export in canyons Morrison, Adele Hogg, Andrew England, Matthew Heathcote Spence, J. Paul application/pdf http://hdl.handle.net/1885/219011 https://doi.org/10.1126/sciadv.aav2516 https://openresearch-repository.anu.edu.au/bitstream/1885/219011/3/01_Morrison_Warm_Circumpolar_Deep_Water_2020.pdf.jpg en_AU eng American Association for the Advancement of Science http://purl.org/au-research/grants/arc/DE170100184 http://purl.org/au-research/grants/arc/DE150100223 http://purl.org/au-research/grants/arc/DP190100494 2375-2548 http://hdl.handle.net/1885/219011 doi:10.1126/sciadv.aav2516 https://openresearch-repository.anu.edu.au/bitstream/1885/219011/3/01_Morrison_Warm_Circumpolar_Deep_Water_2020.pdf.jpg Copyright © 2020 The Authors https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution License (CC BY) Science Advances https://dx.doi.org/10.1126/sciadv.aav2516 Journal article ftanucanberra https://doi.org/10.1126/sciadv.aav2516 2023-12-15T09:39:11Z Poleward transport of warm Circumpolar Deep Water (CDW) has been linked to melting of Antarctic ice shelves. However, even the steady-state spatial distribution and mechanisms of CDW transport remain poorly understood. Using a global, eddying ocean model, we explore the relationship between the cross-slope transports of CDW and descending Dense Shelf Water (DSW). We find large spatial variability in CDW heat and volume transport around Antarctica, with substantially enhanced flow where DSW descends in canyons. The CDW and DSW transports are highly spatially correlated within ~20 km and temporally correlated on subdaily time scales. Focusing on the Ross Sea, we show that the relationship is driven by pulses of overflowing DSW lowering sea surface height, leading to net onshore CDW transport. The majority of simulated onshore CDW transport is concentrated in cold-water regions, rather than warm-water regions, with potential implications for ice-ocean interactions and global sea level rise. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelves Ross Sea Australian National University: ANU Digital Collections Antarctic Ross Sea Science Advances 6 18 |
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Open Polar |
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Australian National University: ANU Digital Collections |
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ftanucanberra |
language |
English |
description |
Poleward transport of warm Circumpolar Deep Water (CDW) has been linked to melting of Antarctic ice shelves. However, even the steady-state spatial distribution and mechanisms of CDW transport remain poorly understood. Using a global, eddying ocean model, we explore the relationship between the cross-slope transports of CDW and descending Dense Shelf Water (DSW). We find large spatial variability in CDW heat and volume transport around Antarctica, with substantially enhanced flow where DSW descends in canyons. The CDW and DSW transports are highly spatially correlated within ~20 km and temporally correlated on subdaily time scales. Focusing on the Ross Sea, we show that the relationship is driven by pulses of overflowing DSW lowering sea surface height, leading to net onshore CDW transport. The majority of simulated onshore CDW transport is concentrated in cold-water regions, rather than warm-water regions, with potential implications for ice-ocean interactions and global sea level rise. |
format |
Article in Journal/Newspaper |
author |
Morrison, Adele Hogg, Andrew England, Matthew Heathcote Spence, J. Paul |
spellingShingle |
Morrison, Adele Hogg, Andrew England, Matthew Heathcote Spence, J. Paul Warm Circumpolar Deep Water transport toward Antarctica driven by local dense water export in canyons |
author_facet |
Morrison, Adele Hogg, Andrew England, Matthew Heathcote Spence, J. Paul |
author_sort |
Morrison, Adele |
title |
Warm Circumpolar Deep Water transport toward Antarctica driven by local dense water export in canyons |
title_short |
Warm Circumpolar Deep Water transport toward Antarctica driven by local dense water export in canyons |
title_full |
Warm Circumpolar Deep Water transport toward Antarctica driven by local dense water export in canyons |
title_fullStr |
Warm Circumpolar Deep Water transport toward Antarctica driven by local dense water export in canyons |
title_full_unstemmed |
Warm Circumpolar Deep Water transport toward Antarctica driven by local dense water export in canyons |
title_sort |
warm circumpolar deep water transport toward antarctica driven by local dense water export in canyons |
publisher |
American Association for the Advancement of Science |
url |
http://hdl.handle.net/1885/219011 https://doi.org/10.1126/sciadv.aav2516 https://openresearch-repository.anu.edu.au/bitstream/1885/219011/3/01_Morrison_Warm_Circumpolar_Deep_Water_2020.pdf.jpg |
geographic |
Antarctic Ross Sea |
geographic_facet |
Antarctic Ross Sea |
genre |
Antarc* Antarctic Antarctica Ice Shelves Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelves Ross Sea |
op_source |
Science Advances https://dx.doi.org/10.1126/sciadv.aav2516 |
op_relation |
http://purl.org/au-research/grants/arc/DE170100184 http://purl.org/au-research/grants/arc/DE150100223 http://purl.org/au-research/grants/arc/DP190100494 2375-2548 http://hdl.handle.net/1885/219011 doi:10.1126/sciadv.aav2516 https://openresearch-repository.anu.edu.au/bitstream/1885/219011/3/01_Morrison_Warm_Circumpolar_Deep_Water_2020.pdf.jpg |
op_rights |
Copyright © 2020 The Authors https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution License (CC BY) |
op_doi |
https://doi.org/10.1126/sciadv.aav2516 |
container_title |
Science Advances |
container_volume |
6 |
container_issue |
18 |
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1788067304054980608 |