The Large-Scale Vorticity Balance of the Antarctic Continental Margin in a Fine-Resolution Global Simulation
ABSTRACT: The depth-integrated vorticity budget of a global, eddy-permitting ocean/sea ice simulation over the Antarctic continental margin (ACM) is diagnosed to understand the physical mechanisms implicated in meridional transport. The leading-order balance is between the torques due to lateral fri...
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ftcdlib:oai:escholarship.org:ark:/13030/qt21q2k8rg 2024-01-14T10:02:04+01:00 The Large-Scale Vorticity Balance of the Antarctic Continental Margin in a Fine-Resolution Global Simulation Palóczy, André McClean, Julie L Gille, Sarah T Wang, He 2173 - 2188 2020-08-01 application/pdf https://escholarship.org/uc/item/21q2k8rg unknown eScholarship, University of California qt21q2k8rg https://escholarship.org/uc/item/21q2k8rg public Journal of Physical Oceanography, vol 50, iss 8 Fluid Mechanics and Thermal Engineering Oceanography Engineering Earth Sciences Life Below Water Maritime Engineering article 2020 ftcdlib 2023-12-18T19:07:01Z ABSTRACT: The depth-integrated vorticity budget of a global, eddy-permitting ocean/sea ice simulation over the Antarctic continental margin (ACM) is diagnosed to understand the physical mechanisms implicated in meridional transport. The leading-order balance is between the torques due to lateral friction, nonlinear effects, and bottom vortex stretching, although details vary regionally. Maps of the time-averaged depth-integrated vorticity budget terms and time series of the spatially averaged, depth-integrated vorticity budget terms reveal that the flow in the Amundsen, Bellingshausen, and Weddell Seas and, to a lesser extent, in the western portion of East Antarctica, is closer to an approximate topographic Sverdrup balance (TSB) compared to other segments of the ACM. Correlation and coherence analyses further support these findings, and also show that inclusion of the vorticity tendency term in the response (the planetary vorticity advection and the bottom vortex stretching term) increases the correlation with the forcing (the vertical net stress curl), and also increases the coherence between forcing and response at high frequencies across the ACM, except for the West Antarctic Peninsula. These findings suggest that the surface stress curl, imparted by the wind and the sea ice, has the potential to contribute to the meridional, approximately cross-slope, transport to a greater extent in the Amundsen, Bellingshausen, Weddell, and part of the East Antarctic continental margin than elsewhere in the ACM. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Sea ice University of California: eScholarship Antarctic Antarctic Peninsula Curl ENVELOPE(-63.071,-63.071,-70.797,-70.797) East Antarctica The Antarctic Weddell |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Fluid Mechanics and Thermal Engineering Oceanography Engineering Earth Sciences Life Below Water Maritime Engineering |
spellingShingle |
Fluid Mechanics and Thermal Engineering Oceanography Engineering Earth Sciences Life Below Water Maritime Engineering Palóczy, André McClean, Julie L Gille, Sarah T Wang, He The Large-Scale Vorticity Balance of the Antarctic Continental Margin in a Fine-Resolution Global Simulation |
topic_facet |
Fluid Mechanics and Thermal Engineering Oceanography Engineering Earth Sciences Life Below Water Maritime Engineering |
description |
ABSTRACT: The depth-integrated vorticity budget of a global, eddy-permitting ocean/sea ice simulation over the Antarctic continental margin (ACM) is diagnosed to understand the physical mechanisms implicated in meridional transport. The leading-order balance is between the torques due to lateral friction, nonlinear effects, and bottom vortex stretching, although details vary regionally. Maps of the time-averaged depth-integrated vorticity budget terms and time series of the spatially averaged, depth-integrated vorticity budget terms reveal that the flow in the Amundsen, Bellingshausen, and Weddell Seas and, to a lesser extent, in the western portion of East Antarctica, is closer to an approximate topographic Sverdrup balance (TSB) compared to other segments of the ACM. Correlation and coherence analyses further support these findings, and also show that inclusion of the vorticity tendency term in the response (the planetary vorticity advection and the bottom vortex stretching term) increases the correlation with the forcing (the vertical net stress curl), and also increases the coherence between forcing and response at high frequencies across the ACM, except for the West Antarctic Peninsula. These findings suggest that the surface stress curl, imparted by the wind and the sea ice, has the potential to contribute to the meridional, approximately cross-slope, transport to a greater extent in the Amundsen, Bellingshausen, Weddell, and part of the East Antarctic continental margin than elsewhere in the ACM. |
format |
Article in Journal/Newspaper |
author |
Palóczy, André McClean, Julie L Gille, Sarah T Wang, He |
author_facet |
Palóczy, André McClean, Julie L Gille, Sarah T Wang, He |
author_sort |
Palóczy, André |
title |
The Large-Scale Vorticity Balance of the Antarctic Continental Margin in a Fine-Resolution Global Simulation |
title_short |
The Large-Scale Vorticity Balance of the Antarctic Continental Margin in a Fine-Resolution Global Simulation |
title_full |
The Large-Scale Vorticity Balance of the Antarctic Continental Margin in a Fine-Resolution Global Simulation |
title_fullStr |
The Large-Scale Vorticity Balance of the Antarctic Continental Margin in a Fine-Resolution Global Simulation |
title_full_unstemmed |
The Large-Scale Vorticity Balance of the Antarctic Continental Margin in a Fine-Resolution Global Simulation |
title_sort |
large-scale vorticity balance of the antarctic continental margin in a fine-resolution global simulation |
publisher |
eScholarship, University of California |
publishDate |
2020 |
url |
https://escholarship.org/uc/item/21q2k8rg |
op_coverage |
2173 - 2188 |
long_lat |
ENVELOPE(-63.071,-63.071,-70.797,-70.797) |
geographic |
Antarctic Antarctic Peninsula Curl East Antarctica The Antarctic Weddell |
geographic_facet |
Antarctic Antarctic Peninsula Curl East Antarctica The Antarctic Weddell |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Sea ice |
op_source |
Journal of Physical Oceanography, vol 50, iss 8 |
op_relation |
qt21q2k8rg https://escholarship.org/uc/item/21q2k8rg |
op_rights |
public |
_version_ |
1788056896445349888 |