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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ftdoajarticles:oai:doaj.org/article:a351c63686b64e3e9fa95308d05d1fb4 2023-05-15T17:25:18+02:00 Influence of numerical schemes on current-topography interactions in 1/4° global ocean simulations G. Madec J.-M. Molines A.-M. Treguier B. Barnier J. Le Sommer T. Penduff 2007-12-01T00:00:00Z https://doaj.org/article/a351c63686b64e3e9fa95308d05d1fb4 EN eng Copernicus Publications http://www.ocean-sci.net/3/509/2007/os-3-509-2007.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 1812-0784 1812-0792 https://doaj.org/article/a351c63686b64e3e9fa95308d05d1fb4 Ocean Science, Vol 3, Iss 4, Pp 509-524 (2007) Geography. Anthropology. Recreation G Environmental sciences GE1-350 article 2007 ftdoajarticles 2022-12-31T00:42:22Z 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 Directory of Open Access Journals: DOAJ Articles Zapiola ENVELOPE(-63.567,-63.567,-65.083,-65.083) |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
spellingShingle |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 G. Madec J.-M. Molines A.-M. Treguier B. Barnier J. Le Sommer T. Penduff Influence of numerical schemes on current-topography interactions in 1/4° global ocean simulations |
topic_facet |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
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 |
G. Madec J.-M. Molines A.-M. Treguier B. Barnier J. Le Sommer T. Penduff |
author_facet |
G. Madec J.-M. Molines A.-M. Treguier B. Barnier J. Le Sommer T. Penduff |
author_sort |
G. Madec |
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://doaj.org/article/a351c63686b64e3e9fa95308d05d1fb4 |
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_source |
Ocean Science, Vol 3, Iss 4, Pp 509-524 (2007) |
op_relation |
http://www.ocean-sci.net/3/509/2007/os-3-509-2007.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 1812-0784 1812-0792 https://doaj.org/article/a351c63686b64e3e9fa95308d05d1fb4 |
_version_ |
1766116687624536064 |