Influence of numerical schemes on current-topography interactions in 1/4° global ocean simulations
The combined use of partial steps and of an energy-enstrophy conserving momentum advection scheme was shown by Barnier et al. (2006) to yield substantial improvements in the surface solution of the DRAKKAR ¼° global sea-ice/ocean model. The present study extends this investigation below the surface...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00031877 2023-05-15T17:25:17+02:00 Influence of numerical schemes on current-topography interactions in 1/4° global ocean simulations Penduff, T. Le Sommer, J. Barnier, B. Treguier, A.-M. Molines, J.-M. Madec, G. 2007-12 electronic https://doi.org/10.5194/os-3-509-2007 https://noa.gwlb.de/receive/cop_mods_00031877 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031831/os-3-509-2007.pdf https://os.copernicus.org/articles/3/509/2007/os-3-509-2007.pdf eng eng Copernicus Publications Ocean Science -- http://www.bibliothek.uni-regensburg.de/ezeit/?2183769 -- http://www.copernicus.org/EGU/os/os.html -- 1812-0792 https://doi.org/10.5194/os-3-509-2007 https://noa.gwlb.de/receive/cop_mods_00031877 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031831/os-3-509-2007.pdf https://os.copernicus.org/articles/3/509/2007/os-3-509-2007.pdf https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2007 ftnonlinearchiv https://doi.org/10.5194/os-3-509-2007 2022-02-08T22:46:32Z The combined use of partial steps and of an energy-enstrophy conserving momentum advection scheme was shown by Barnier et al. (2006) to yield substantial improvements in the surface solution of the DRAKKAR ¼° global sea-ice/ocean model. The present study extends this investigation below the surface with a special focus on the Atlantic and reveals many improvements there as well: e.g. more realistic path, structure and transports of major currents (Gulf Stream, North Atlantic Current, Confluence region, Zapiola anticyclone), behavior of shedded rings, narrower subsurface boundary currents, stronger mean and eddy flows (MKE and EKE) at depth, beneficial enhancement of cyclonic (anticyclonic) flows around topographic depressions (mountains). Interestingly, adding a no-slip boundary condition to this improved model setup cancels most of these improvements, bringing back the biases diagnosed without the improved momentum advection scheme and partial steps (these biases are typical of other models at comparable or higher resolutions). This shows that current-topography interactions and full-depth eddy-admitting model solutions can be seriously deteriorated by near-bottom sidewall friction, either explicit or inherent to inadequate numerical schemes. Article in Journal/Newspaper north atlantic current North Atlantic Sea ice Niedersächsisches Online-Archiv NOA Zapiola ENVELOPE(-63.567,-63.567,-65.083,-65.083) Ocean Science 3 4 509 524 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Penduff, T. Le Sommer, J. Barnier, B. Treguier, A.-M. Molines, J.-M. Madec, G. Influence of numerical schemes on current-topography interactions in 1/4° global ocean simulations |
topic_facet |
article Verlagsveröffentlichung |
description |
The combined use of partial steps and of an energy-enstrophy conserving momentum advection scheme was shown by Barnier et al. (2006) to yield substantial improvements in the surface solution of the DRAKKAR ¼° global sea-ice/ocean model. The present study extends this investigation below the surface with a special focus on the Atlantic and reveals many improvements there as well: e.g. more realistic path, structure and transports of major currents (Gulf Stream, North Atlantic Current, Confluence region, Zapiola anticyclone), behavior of shedded rings, narrower subsurface boundary currents, stronger mean and eddy flows (MKE and EKE) at depth, beneficial enhancement of cyclonic (anticyclonic) flows around topographic depressions (mountains). Interestingly, adding a no-slip boundary condition to this improved model setup cancels most of these improvements, bringing back the biases diagnosed without the improved momentum advection scheme and partial steps (these biases are typical of other models at comparable or higher resolutions). This shows that current-topography interactions and full-depth eddy-admitting model solutions can be seriously deteriorated by near-bottom sidewall friction, either explicit or inherent to inadequate numerical schemes. |
format |
Article in Journal/Newspaper |
author |
Penduff, T. Le Sommer, J. Barnier, B. Treguier, A.-M. Molines, J.-M. Madec, G. |
author_facet |
Penduff, T. Le Sommer, J. Barnier, B. Treguier, A.-M. Molines, J.-M. Madec, G. |
author_sort |
Penduff, T. |
title |
Influence of numerical schemes on current-topography interactions in 1/4° global ocean simulations |
title_short |
Influence of numerical schemes on current-topography interactions in 1/4° global ocean simulations |
title_full |
Influence of numerical schemes on current-topography interactions in 1/4° global ocean simulations |
title_fullStr |
Influence of numerical schemes on current-topography interactions in 1/4° global ocean simulations |
title_full_unstemmed |
Influence of numerical schemes on current-topography interactions in 1/4° global ocean simulations |
title_sort |
influence of numerical schemes on current-topography interactions in 1/4° global ocean simulations |
publisher |
Copernicus Publications |
publishDate |
2007 |
url |
https://doi.org/10.5194/os-3-509-2007 https://noa.gwlb.de/receive/cop_mods_00031877 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031831/os-3-509-2007.pdf https://os.copernicus.org/articles/3/509/2007/os-3-509-2007.pdf |
long_lat |
ENVELOPE(-63.567,-63.567,-65.083,-65.083) |
geographic |
Zapiola |
geographic_facet |
Zapiola |
genre |
north atlantic current North Atlantic Sea ice |
genre_facet |
north atlantic current North Atlantic Sea ice |
op_relation |
Ocean Science -- http://www.bibliothek.uni-regensburg.de/ezeit/?2183769 -- http://www.copernicus.org/EGU/os/os.html -- 1812-0792 https://doi.org/10.5194/os-3-509-2007 https://noa.gwlb.de/receive/cop_mods_00031877 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031831/os-3-509-2007.pdf https://os.copernicus.org/articles/3/509/2007/os-3-509-2007.pdf |
op_rights |
https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/os-3-509-2007 |
container_title |
Ocean Science |
container_volume |
3 |
container_issue |
4 |
container_start_page |
509 |
op_container_end_page |
524 |
_version_ |
1766116681318400000 |