Role of tides on the formation of the Antarctic Slope Front at the Weddell-Scotia Confluence
© 2015. American Geophysical Union. All Rights Reserved. California Institute of Technology. Government sponsorship acknowledged. The structure of the Antarctic Slope Front (ASF) and the associated Antarctic Slope Current (ASC) on the Scotia Sea side of the Weddell-Scotia Confluence (WSC) is describ...
Published in: | Journal of Geophysical Research: Oceans |
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2015
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Online Access: | http://hdl.handle.net/10261/126115 https://doi.org/10.1002/2014JC010372 https://doi.org/10.13039/100000104 https://doi.org/10.13039/100000001 https://doi.org/10.13039/501100007273 |
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ftcsic:oai:digital.csic.es:10261/126115 2024-02-11T09:56:55+01:00 Role of tides on the formation of the Antarctic Slope Front at the Weddell-Scotia Confluence Flexas, María del Mar Schodlok, Michael P. Padman, Laurence Menemenlis, Dimitris Orsi, Alejandro H. National Aeronautics and Space Administration (US) National Science Foundation (US) Comisión Interministerial de Ciencia y Tecnología, CICYT (España) 2015-05-23 http://hdl.handle.net/10261/126115 https://doi.org/10.1002/2014JC010372 https://doi.org/10.13039/100000104 https://doi.org/10.13039/100000001 https://doi.org/10.13039/501100007273 unknown American Geophysical Union Publisher's version http://dx.doi.org/10.1002/2014JC010372 Sí doi:10.1002/2014JC010372 issn: 2169-9291 Journal of Geophysical Research-Oceans 120(5): 3658-3680 (2015) http://hdl.handle.net/10261/126115 http://dx.doi.org/10.13039/100000104 http://dx.doi.org/10.13039/100000001 http://dx.doi.org/10.13039/501100007273 open artículo http://purl.org/coar/resource_type/c_6501 2015 ftcsic https://doi.org/10.1002/2014JC01037210.13039/10000010410.13039/10000000110.13039/501100007273 2024-01-16T10:12:22Z © 2015. American Geophysical Union. All Rights Reserved. California Institute of Technology. Government sponsorship acknowledged. The structure of the Antarctic Slope Front (ASF) and the associated Antarctic Slope Current (ASC) on the Scotia Sea side of the Weddell-Scotia Confluence (WSC) is described using data from a hydrographic survey and three 1 year long moorings across the continental slope. The ASC in this region flows westward along isobaths with an annual mean speed of ∼0.2 m s -1 , with time variability dominated by the K 1 and O 1 tidal diurnal constituents, a narrowband oscillation with ∼2-week period attributable to the spring/neap tidal cycle, and seasonal variability. Realistic and idealized high-resolution numerical simulations are used to determine the contribution of tides to the structure of the ASF and the speed of the ASC. Two simulations forced by realistic atmospheric forcing and boundary conditions integrated with and without tidal forcing show that tidal forcing is essential to reproduce the measured ASF/ASC cross-slope structure, the time variability at our moorings, and the reduced stratification within the WSC. Two idealized simulations run with tide-only forcing, one with a homogeneous ocean and the other with initial vertical stratification that is laterally homogeneous, show that tides can generate the ASC and ASF through volume flux convergence along the slope initiated by effects including the Lagrangian component of tidal rectification and mixing at the seabed and in the stratified ocean interior. Climate models that exclude the effects of tides will not correctly represent the ASF and ASC or their influence on the injection of intermediate and dense waters from the WSC to the deep ocean. Key Points: Tides set mean properties of Antarctic Slope Front in Weddell-Scotia Confluence Volume convergence by tidal rectification, plus mixing, creates Slope Current Shelf water properties in Weddell-Scotia Confluence modified by tides This research was supported by the Spanish Research ... Article in Journal/Newspaper Antarc* Antarctic Scotia Sea Digital.CSIC (Spanish National Research Council) Antarctic Scotia Sea The Antarctic Weddell Journal of Geophysical Research: Oceans 120 5 3658 3680 |
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Open Polar |
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Digital.CSIC (Spanish National Research Council) |
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description |
© 2015. American Geophysical Union. All Rights Reserved. California Institute of Technology. Government sponsorship acknowledged. The structure of the Antarctic Slope Front (ASF) and the associated Antarctic Slope Current (ASC) on the Scotia Sea side of the Weddell-Scotia Confluence (WSC) is described using data from a hydrographic survey and three 1 year long moorings across the continental slope. The ASC in this region flows westward along isobaths with an annual mean speed of ∼0.2 m s -1 , with time variability dominated by the K 1 and O 1 tidal diurnal constituents, a narrowband oscillation with ∼2-week period attributable to the spring/neap tidal cycle, and seasonal variability. Realistic and idealized high-resolution numerical simulations are used to determine the contribution of tides to the structure of the ASF and the speed of the ASC. Two simulations forced by realistic atmospheric forcing and boundary conditions integrated with and without tidal forcing show that tidal forcing is essential to reproduce the measured ASF/ASC cross-slope structure, the time variability at our moorings, and the reduced stratification within the WSC. Two idealized simulations run with tide-only forcing, one with a homogeneous ocean and the other with initial vertical stratification that is laterally homogeneous, show that tides can generate the ASC and ASF through volume flux convergence along the slope initiated by effects including the Lagrangian component of tidal rectification and mixing at the seabed and in the stratified ocean interior. Climate models that exclude the effects of tides will not correctly represent the ASF and ASC or their influence on the injection of intermediate and dense waters from the WSC to the deep ocean. Key Points: Tides set mean properties of Antarctic Slope Front in Weddell-Scotia Confluence Volume convergence by tidal rectification, plus mixing, creates Slope Current Shelf water properties in Weddell-Scotia Confluence modified by tides This research was supported by the Spanish Research ... |
author2 |
National Aeronautics and Space Administration (US) National Science Foundation (US) Comisión Interministerial de Ciencia y Tecnología, CICYT (España) |
format |
Article in Journal/Newspaper |
author |
Flexas, María del Mar Schodlok, Michael P. Padman, Laurence Menemenlis, Dimitris Orsi, Alejandro H. |
spellingShingle |
Flexas, María del Mar Schodlok, Michael P. Padman, Laurence Menemenlis, Dimitris Orsi, Alejandro H. Role of tides on the formation of the Antarctic Slope Front at the Weddell-Scotia Confluence |
author_facet |
Flexas, María del Mar Schodlok, Michael P. Padman, Laurence Menemenlis, Dimitris Orsi, Alejandro H. |
author_sort |
Flexas, María del Mar |
title |
Role of tides on the formation of the Antarctic Slope Front at the Weddell-Scotia Confluence |
title_short |
Role of tides on the formation of the Antarctic Slope Front at the Weddell-Scotia Confluence |
title_full |
Role of tides on the formation of the Antarctic Slope Front at the Weddell-Scotia Confluence |
title_fullStr |
Role of tides on the formation of the Antarctic Slope Front at the Weddell-Scotia Confluence |
title_full_unstemmed |
Role of tides on the formation of the Antarctic Slope Front at the Weddell-Scotia Confluence |
title_sort |
role of tides on the formation of the antarctic slope front at the weddell-scotia confluence |
publisher |
American Geophysical Union |
publishDate |
2015 |
url |
http://hdl.handle.net/10261/126115 https://doi.org/10.1002/2014JC010372 https://doi.org/10.13039/100000104 https://doi.org/10.13039/100000001 https://doi.org/10.13039/501100007273 |
geographic |
Antarctic Scotia Sea The Antarctic Weddell |
geographic_facet |
Antarctic Scotia Sea The Antarctic Weddell |
genre |
Antarc* Antarctic Scotia Sea |
genre_facet |
Antarc* Antarctic Scotia Sea |
op_relation |
Publisher's version http://dx.doi.org/10.1002/2014JC010372 Sí doi:10.1002/2014JC010372 issn: 2169-9291 Journal of Geophysical Research-Oceans 120(5): 3658-3680 (2015) http://hdl.handle.net/10261/126115 http://dx.doi.org/10.13039/100000104 http://dx.doi.org/10.13039/100000001 http://dx.doi.org/10.13039/501100007273 |
op_rights |
open |
op_doi |
https://doi.org/10.1002/2014JC01037210.13039/10000010410.13039/10000000110.13039/501100007273 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
5 |
container_start_page |
3658 |
op_container_end_page |
3680 |
_version_ |
1790607023001305088 |