Decoupling of the Surface and Bottom‐Intensified Antarctic Slope Current in Regions of Dense Shelf Water Export
Abstract The Antarctic Slope Current is guided by the topographic gradient of the Antarctic continental slope and creates a dynamical barrier between the continental shelf and the open ocean. The current's vertical structure varies around the continent affecting cross‐slope water mass exchange...
Published in: | Geophysical Research Letters |
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Online Access: | https://doi.org/10.1029/2023GL104834 https://doaj.org/article/3c1ea88f630147f8bc7c778601e300dd |
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ftdoajarticles:oai:doaj.org/article:3c1ea88f630147f8bc7c778601e300dd 2024-09-09T19:10:10+00:00 Decoupling of the Surface and Bottom‐Intensified Antarctic Slope Current in Regions of Dense Shelf Water Export Wilma G. C. Huneke Adele K. Morrison Andrew McC. Hogg 2023-08-01T00:00:00Z https://doi.org/10.1029/2023GL104834 https://doaj.org/article/3c1ea88f630147f8bc7c778601e300dd EN eng Wiley https://doi.org/10.1029/2023GL104834 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL104834 https://doaj.org/article/3c1ea88f630147f8bc7c778601e300dd Geophysical Research Letters, Vol 50, Iss 16, Pp n/a-n/a (2023) Antarctic slope current dense shelf water Antarctica plume transport Geophysics. Cosmic physics QC801-809 article 2023 ftdoajarticles https://doi.org/10.1029/2023GL104834 2024-08-05T17:49:23Z Abstract The Antarctic Slope Current is guided by the topographic gradient of the Antarctic continental slope and creates a dynamical barrier between the continental shelf and the open ocean. The current's vertical structure varies around the continent affecting cross‐slope water mass exchange with consequences for Antarctic mass loss, ventilation of the deep ocean, and carbon uptake. The Antarctic Slope Current is surface‐intensified in many regions but bottom‐intensified in regions of dense overflows. This study investigates the role of dense overflows in modifying the dynamics of the bottom‐intensified flow using a 0.1° global ocean‐sea ice model. The occurrence of bottom‐intensification is tightly linked with dense overflows and bottom speeds correlate with dense overflows on interannual time scales. A lack of vertical connectivity between the bottom and surface flow, however, suggests that the along‐slope bottom water flows are coincidentally co‐located with the Antarctic Slope Current, rather than dynamically a part of the current. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Geophysical Research Letters 50 16 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic slope current dense shelf water Antarctica plume transport Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Antarctic slope current dense shelf water Antarctica plume transport Geophysics. Cosmic physics QC801-809 Wilma G. C. Huneke Adele K. Morrison Andrew McC. Hogg Decoupling of the Surface and Bottom‐Intensified Antarctic Slope Current in Regions of Dense Shelf Water Export |
topic_facet |
Antarctic slope current dense shelf water Antarctica plume transport Geophysics. Cosmic physics QC801-809 |
description |
Abstract The Antarctic Slope Current is guided by the topographic gradient of the Antarctic continental slope and creates a dynamical barrier between the continental shelf and the open ocean. The current's vertical structure varies around the continent affecting cross‐slope water mass exchange with consequences for Antarctic mass loss, ventilation of the deep ocean, and carbon uptake. The Antarctic Slope Current is surface‐intensified in many regions but bottom‐intensified in regions of dense overflows. This study investigates the role of dense overflows in modifying the dynamics of the bottom‐intensified flow using a 0.1° global ocean‐sea ice model. The occurrence of bottom‐intensification is tightly linked with dense overflows and bottom speeds correlate with dense overflows on interannual time scales. A lack of vertical connectivity between the bottom and surface flow, however, suggests that the along‐slope bottom water flows are coincidentally co‐located with the Antarctic Slope Current, rather than dynamically a part of the current. |
format |
Article in Journal/Newspaper |
author |
Wilma G. C. Huneke Adele K. Morrison Andrew McC. Hogg |
author_facet |
Wilma G. C. Huneke Adele K. Morrison Andrew McC. Hogg |
author_sort |
Wilma G. C. Huneke |
title |
Decoupling of the Surface and Bottom‐Intensified Antarctic Slope Current in Regions of Dense Shelf Water Export |
title_short |
Decoupling of the Surface and Bottom‐Intensified Antarctic Slope Current in Regions of Dense Shelf Water Export |
title_full |
Decoupling of the Surface and Bottom‐Intensified Antarctic Slope Current in Regions of Dense Shelf Water Export |
title_fullStr |
Decoupling of the Surface and Bottom‐Intensified Antarctic Slope Current in Regions of Dense Shelf Water Export |
title_full_unstemmed |
Decoupling of the Surface and Bottom‐Intensified Antarctic Slope Current in Regions of Dense Shelf Water Export |
title_sort |
decoupling of the surface and bottom‐intensified antarctic slope current in regions of dense shelf water export |
publisher |
Wiley |
publishDate |
2023 |
url |
https://doi.org/10.1029/2023GL104834 https://doaj.org/article/3c1ea88f630147f8bc7c778601e300dd |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_source |
Geophysical Research Letters, Vol 50, Iss 16, Pp n/a-n/a (2023) |
op_relation |
https://doi.org/10.1029/2023GL104834 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL104834 https://doaj.org/article/3c1ea88f630147f8bc7c778601e300dd |
op_doi |
https://doi.org/10.1029/2023GL104834 |
container_title |
Geophysical Research Letters |
container_volume |
50 |
container_issue |
16 |
_version_ |
1809824759513350144 |