An eddy-permitting model of the Atlantic circulation: Evaluating open boundary conditions
As part of the French CLIPPER project, an eddy permitting model of the Atlantic circulation has been run for 22 years. The domain has open boundaries at Drake passage and at 30 degreesE, from Africa to Antarctica. The simulated mean circulation, as well as the eddy activity, is satisfactory for a 1/...
Published in: | Journal of Geophysical Research: Oceans |
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ftarchimer:oai:archimer.ifremer.fr:454 2023-05-15T14:04:56+02:00 An eddy-permitting model of the Atlantic circulation: Evaluating open boundary conditions Treguier, Anne-marie Barnier, B De Miranda, A Molines, J Grima, N Imbard, M Madec, G Messager, Christophe Reynaud, Thierry Michel, Sylvain 2001-10 application/pdf https://archimer.ifremer.fr/doc/2001/publication-454.pdf https://doi.org/10.1029/2000JC000376 https://archimer.ifremer.fr/doc/00000/454/ eng eng American Geophysical Union https://archimer.ifremer.fr/doc/2001/publication-454.pdf doi:10.1029/2000JC000376 https://archimer.ifremer.fr/doc/00000/454/ 2001 American Geophysical Union info:eu-repo/semantics/openAccess restricted use Journal of Geophysical Union - Research C - Oceans (0148-0227) (American Geophysical Union), 2001-10 , Vol. 106 , N. C10 , P. 22115-22129 General circulation Numerical modeling Oceanography text Publication info:eu-repo/semantics/article 2001 ftarchimer https://doi.org/10.1029/2000JC000376 2021-09-23T20:13:07Z As part of the French CLIPPER project, an eddy permitting model of the Atlantic circulation has been run for 22 years. The domain has open boundaries at Drake passage and at 30 degreesE, from Africa to Antarctica. The simulated mean circulation, as well as the eddy activity, is satisfactory for a 1/3 degrees model resolution, and the meridional heat transport at 30 degreesS is within the range estimated from observations. We use the "mixed" open boundary algorithm of Barnier et al. [1998], which has both a radiation condition and a relaxation to climatology. The climatological boundary forcing strongly constrains the solution in the whole domain. The model heat balance adjusts through the surface (heat flux retroaction term) more than the open boundaries. The radiation phase velocities calculated within the algorithm are analyzed. This shows, quite surprisingly, that both the eastern and western boundaries have a similar behavior, regardless of the preferred directions for advection (mainly eastward) and wave propagation (mainly westward). Our results confirm that open boundary algorithms behave differently according to the dynamics of the region considered. The passive boundary condition that Penduff et al. [2000] applied successfully in the north eastern Atlantic does not work in the present South Atlantic model. We emphasize the need for a careful prescription of the climatology at the open boundary, for which a new approach based on synoptic sections is implemented. Article in Journal/Newspaper Antarc* Antarctica Drake Passage Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Drake Passage Journal of Geophysical Research: Oceans 106 C10 22115 22129 |
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 |
topic |
General circulation Numerical modeling Oceanography |
spellingShingle |
General circulation Numerical modeling Oceanography Treguier, Anne-marie Barnier, B De Miranda, A Molines, J Grima, N Imbard, M Madec, G Messager, Christophe Reynaud, Thierry Michel, Sylvain An eddy-permitting model of the Atlantic circulation: Evaluating open boundary conditions |
topic_facet |
General circulation Numerical modeling Oceanography |
description |
As part of the French CLIPPER project, an eddy permitting model of the Atlantic circulation has been run for 22 years. The domain has open boundaries at Drake passage and at 30 degreesE, from Africa to Antarctica. The simulated mean circulation, as well as the eddy activity, is satisfactory for a 1/3 degrees model resolution, and the meridional heat transport at 30 degreesS is within the range estimated from observations. We use the "mixed" open boundary algorithm of Barnier et al. [1998], which has both a radiation condition and a relaxation to climatology. The climatological boundary forcing strongly constrains the solution in the whole domain. The model heat balance adjusts through the surface (heat flux retroaction term) more than the open boundaries. The radiation phase velocities calculated within the algorithm are analyzed. This shows, quite surprisingly, that both the eastern and western boundaries have a similar behavior, regardless of the preferred directions for advection (mainly eastward) and wave propagation (mainly westward). Our results confirm that open boundary algorithms behave differently according to the dynamics of the region considered. The passive boundary condition that Penduff et al. [2000] applied successfully in the north eastern Atlantic does not work in the present South Atlantic model. We emphasize the need for a careful prescription of the climatology at the open boundary, for which a new approach based on synoptic sections is implemented. |
format |
Article in Journal/Newspaper |
author |
Treguier, Anne-marie Barnier, B De Miranda, A Molines, J Grima, N Imbard, M Madec, G Messager, Christophe Reynaud, Thierry Michel, Sylvain |
author_facet |
Treguier, Anne-marie Barnier, B De Miranda, A Molines, J Grima, N Imbard, M Madec, G Messager, Christophe Reynaud, Thierry Michel, Sylvain |
author_sort |
Treguier, Anne-marie |
title |
An eddy-permitting model of the Atlantic circulation: Evaluating open boundary conditions |
title_short |
An eddy-permitting model of the Atlantic circulation: Evaluating open boundary conditions |
title_full |
An eddy-permitting model of the Atlantic circulation: Evaluating open boundary conditions |
title_fullStr |
An eddy-permitting model of the Atlantic circulation: Evaluating open boundary conditions |
title_full_unstemmed |
An eddy-permitting model of the Atlantic circulation: Evaluating open boundary conditions |
title_sort |
eddy-permitting model of the atlantic circulation: evaluating open boundary conditions |
publisher |
American Geophysical Union |
publishDate |
2001 |
url |
https://archimer.ifremer.fr/doc/2001/publication-454.pdf https://doi.org/10.1029/2000JC000376 https://archimer.ifremer.fr/doc/00000/454/ |
geographic |
Drake Passage |
geographic_facet |
Drake Passage |
genre |
Antarc* Antarctica Drake Passage |
genre_facet |
Antarc* Antarctica Drake Passage |
op_source |
Journal of Geophysical Union - Research C - Oceans (0148-0227) (American Geophysical Union), 2001-10 , Vol. 106 , N. C10 , P. 22115-22129 |
op_relation |
https://archimer.ifremer.fr/doc/2001/publication-454.pdf doi:10.1029/2000JC000376 https://archimer.ifremer.fr/doc/00000/454/ |
op_rights |
2001 American Geophysical Union info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2000JC000376 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
106 |
container_issue |
C10 |
container_start_page |
22115 |
op_container_end_page |
22129 |
_version_ |
1766276385748287488 |