Topography and grounding in a simple bottom layer model
A reduced-gravity model for a dense bottom layer under a motionless deep layer is used to investigate bottom layer flow with topography. The two competing effects in the model are topography, which introduces a topographic beta effect, and strong layer thickness variation, which allows for the possi...
Published in: | Journal of Geophysical Research: Oceans |
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Language: | English |
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Amer Geophysical Union
1993
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Online Access: | https://archimer.ifremer.fr/doc/00193/30390/29227.pdf https://doi.org/10.1029/92JC03018 https://archimer.ifremer.fr/doc/00193/30390/ |
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ftarchimer:oai:archimer.ifremer.fr:30390 2023-05-15T13:50:49+02:00 Topography and grounding in a simple bottom layer model Speer, Kevin G Tziperman, Eli Feliks, Yizhak 1993-05 application/pdf https://archimer.ifremer.fr/doc/00193/30390/29227.pdf https://doi.org/10.1029/92JC03018 https://archimer.ifremer.fr/doc/00193/30390/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00193/30390/29227.pdf doi:10.1029/92JC03018 https://archimer.ifremer.fr/doc/00193/30390/ 1993 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use Journal Of Geophysical Research-oceans (0148-0227) (Amer Geophysical Union), 1993-05 , Vol. 98 , N. C5 , P. 8547-8558 text Publication info:eu-repo/semantics/article 1993 ftarchimer https://doi.org/10.1029/92JC03018 2021-09-23T20:24:29Z A reduced-gravity model for a dense bottom layer under a motionless deep layer is used to investigate bottom layer flow with topography. The two competing effects in the model are topography, which introduces a topographic beta effect, and strong layer thickness variation, which allows for the possibility of zero-layer thickness or grounding. The goal is to arrive at a simple, observationally relevant characterization of the model which can help to distinguish different dynamical mechanisms operating in the ocean. Several regimes are identified, including situations for which the layer depth goes to zero with and without topography. Ways of distinguishing observationally between competing effects are suggested. The study is motivated by the observed shift of Antarctic Bottom Water in the western North Atlantic Ocean from the west to the east; this phenomenon is used to discriminate key elements of the model. Article in Journal/Newspaper Antarc* Antarctic North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic Journal of Geophysical Research: Oceans 98 C5 8547 8558 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
A reduced-gravity model for a dense bottom layer under a motionless deep layer is used to investigate bottom layer flow with topography. The two competing effects in the model are topography, which introduces a topographic beta effect, and strong layer thickness variation, which allows for the possibility of zero-layer thickness or grounding. The goal is to arrive at a simple, observationally relevant characterization of the model which can help to distinguish different dynamical mechanisms operating in the ocean. Several regimes are identified, including situations for which the layer depth goes to zero with and without topography. Ways of distinguishing observationally between competing effects are suggested. The study is motivated by the observed shift of Antarctic Bottom Water in the western North Atlantic Ocean from the west to the east; this phenomenon is used to discriminate key elements of the model. |
format |
Article in Journal/Newspaper |
author |
Speer, Kevin G Tziperman, Eli Feliks, Yizhak |
spellingShingle |
Speer, Kevin G Tziperman, Eli Feliks, Yizhak Topography and grounding in a simple bottom layer model |
author_facet |
Speer, Kevin G Tziperman, Eli Feliks, Yizhak |
author_sort |
Speer, Kevin G |
title |
Topography and grounding in a simple bottom layer model |
title_short |
Topography and grounding in a simple bottom layer model |
title_full |
Topography and grounding in a simple bottom layer model |
title_fullStr |
Topography and grounding in a simple bottom layer model |
title_full_unstemmed |
Topography and grounding in a simple bottom layer model |
title_sort |
topography and grounding in a simple bottom layer model |
publisher |
Amer Geophysical Union |
publishDate |
1993 |
url |
https://archimer.ifremer.fr/doc/00193/30390/29227.pdf https://doi.org/10.1029/92JC03018 https://archimer.ifremer.fr/doc/00193/30390/ |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic North Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic |
op_source |
Journal Of Geophysical Research-oceans (0148-0227) (Amer Geophysical Union), 1993-05 , Vol. 98 , N. C5 , P. 8547-8558 |
op_relation |
https://archimer.ifremer.fr/doc/00193/30390/29227.pdf doi:10.1029/92JC03018 https://archimer.ifremer.fr/doc/00193/30390/ |
op_rights |
1993 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/92JC03018 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
98 |
container_issue |
C5 |
container_start_page |
8547 |
op_container_end_page |
8558 |
_version_ |
1766254116181377024 |