Impact of partial steps and momentum advection schemes in a global ocean circulation model at eddy permitting resolution
Series of sensitivity tests were performed with a z-coordinate, global eddy-permitting (1/4°) ocean/sea-ice model (the ORCA-R025 model configuration developed for the DRAKKAR project) to carefully evaluate the impact of recent state-of-the-art numerical schemes on model solutions. The combination of...
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Online Access: | https://hal.science/hal-00183611 https://doi.org/10.1007/s10236-006-0082-1 |
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ftunigrenoble:oai:HAL:hal-00183611v1 2024-05-12T08:07:24+00:00 Impact of partial steps and momentum advection schemes in a global ocean circulation model at eddy permitting resolution Barnier, Bernard Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) Londres, United Kingdom 2006-03-06 https://hal.science/hal-00183611 https://doi.org/10.1007/s10236-006-0082-1 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1007/s10236-006-0082-1 hal-00183611 https://hal.science/hal-00183611 doi:10.1007/s10236-006-0082-1 http://creativecommons.org/licenses/by/ MERSEA Annual Science Meeting https://hal.science/hal-00183611 MERSEA Annual Science Meeting, Mar 2006, Londres, United Kingdom. ⟨10.1007/s10236-006-0082-1⟩ Global ocean Eddy-permitting ocean model Momentum advection scheme Partial step topography Eddy/topography interactions [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] info:eu-repo/semantics/conferenceObject Conference papers 2006 ftunigrenoble https://doi.org/10.1007/s10236-006-0082-1 2024-04-18T03:56:59Z Series of sensitivity tests were performed with a z-coordinate, global eddy-permitting (1/4°) ocean/sea-ice model (the ORCA-R025 model configuration developed for the DRAKKAR project) to carefully evaluate the impact of recent state-of-the-art numerical schemes on model solutions. The combination of an energy–enstrophy conserving (EEN) scheme for momentum advection with a partial step (PS) representation of the bottom topography yields significant improvements in the mean circulation. Well known biases in the representation of western boundary currents, such as in the Atlantic the detachment of the Gulf Stream, the path of the North Atlantic Current, the location of the Confluence, and the strength of the Zapiola Eddy in the south Atlantic, are partly corrected. Similar improvements are found in the Pacific, Indian, and Southern Oceans, and characteristics of the mean flow are generally much closer to observations. Comparisons with other state-of-the-art models show that the ORCA-R025 configuration generally performs better at similar resolution. In addition, the model solution is often comparable to solutions obtained at 1/6 or 1/10° resolution in some aspects concerning mean flow patterns and distribution of eddy kinetic energy. Although the reasons for these improvements are not analyzed in detail in this paper, evidence is shown that the combination of EEN with PS reduces numerical noise near the bottom, which is likely to affect current–topography interactions in a systematic way. We conclude that significant corrections of the mean biases presently seen in general circulation model solutions at eddy-permitting resolution can still be expected from the development of numerical methods, which represent an alternative to increasing resolution. Conference Object north atlantic current North Atlantic Orca Sea ice Université Grenoble Alpes: HAL Indian Pacific Zapiola ENVELOPE(-63.567,-63.567,-65.083,-65.083) Ocean Dynamics 56 5-6 543 567 |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
Global ocean Eddy-permitting ocean model Momentum advection scheme Partial step topography Eddy/topography interactions [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] |
spellingShingle |
Global ocean Eddy-permitting ocean model Momentum advection scheme Partial step topography Eddy/topography interactions [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] Barnier, Bernard Impact of partial steps and momentum advection schemes in a global ocean circulation model at eddy permitting resolution |
topic_facet |
Global ocean Eddy-permitting ocean model Momentum advection scheme Partial step topography Eddy/topography interactions [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] |
description |
Series of sensitivity tests were performed with a z-coordinate, global eddy-permitting (1/4°) ocean/sea-ice model (the ORCA-R025 model configuration developed for the DRAKKAR project) to carefully evaluate the impact of recent state-of-the-art numerical schemes on model solutions. The combination of an energy–enstrophy conserving (EEN) scheme for momentum advection with a partial step (PS) representation of the bottom topography yields significant improvements in the mean circulation. Well known biases in the representation of western boundary currents, such as in the Atlantic the detachment of the Gulf Stream, the path of the North Atlantic Current, the location of the Confluence, and the strength of the Zapiola Eddy in the south Atlantic, are partly corrected. Similar improvements are found in the Pacific, Indian, and Southern Oceans, and characteristics of the mean flow are generally much closer to observations. Comparisons with other state-of-the-art models show that the ORCA-R025 configuration generally performs better at similar resolution. In addition, the model solution is often comparable to solutions obtained at 1/6 or 1/10° resolution in some aspects concerning mean flow patterns and distribution of eddy kinetic energy. Although the reasons for these improvements are not analyzed in detail in this paper, evidence is shown that the combination of EEN with PS reduces numerical noise near the bottom, which is likely to affect current–topography interactions in a systematic way. We conclude that significant corrections of the mean biases presently seen in general circulation model solutions at eddy-permitting resolution can still be expected from the development of numerical methods, which represent an alternative to increasing resolution. |
author2 |
Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Barnier, Bernard |
author_facet |
Barnier, Bernard |
author_sort |
Barnier, Bernard |
title |
Impact of partial steps and momentum advection schemes in a global ocean circulation model at eddy permitting resolution |
title_short |
Impact of partial steps and momentum advection schemes in a global ocean circulation model at eddy permitting resolution |
title_full |
Impact of partial steps and momentum advection schemes in a global ocean circulation model at eddy permitting resolution |
title_fullStr |
Impact of partial steps and momentum advection schemes in a global ocean circulation model at eddy permitting resolution |
title_full_unstemmed |
Impact of partial steps and momentum advection schemes in a global ocean circulation model at eddy permitting resolution |
title_sort |
impact of partial steps and momentum advection schemes in a global ocean circulation model at eddy permitting resolution |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00183611 https://doi.org/10.1007/s10236-006-0082-1 |
op_coverage |
Londres, United Kingdom |
long_lat |
ENVELOPE(-63.567,-63.567,-65.083,-65.083) |
geographic |
Indian Pacific Zapiola |
geographic_facet |
Indian Pacific Zapiola |
genre |
north atlantic current North Atlantic Orca Sea ice |
genre_facet |
north atlantic current North Atlantic Orca Sea ice |
op_source |
MERSEA Annual Science Meeting https://hal.science/hal-00183611 MERSEA Annual Science Meeting, Mar 2006, Londres, United Kingdom. ⟨10.1007/s10236-006-0082-1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10236-006-0082-1 hal-00183611 https://hal.science/hal-00183611 doi:10.1007/s10236-006-0082-1 |
op_rights |
http://creativecommons.org/licenses/by/ |
op_doi |
https://doi.org/10.1007/s10236-006-0082-1 |
container_title |
Ocean Dynamics |
container_volume |
56 |
container_issue |
5-6 |
container_start_page |
543 |
op_container_end_page |
567 |
_version_ |
1798850067081199616 |