Impact of spatial resolution on simulated surface water mass transformations in the Atlantic
International audience We analyze the water mass transformation in coarse (1°) and high (1/6°) resolution ocean simulations with the identical configuration of the CLIPPER model and interannual ERA15 forcing function. Climatological characteristics of surface water mass transformation in the two exp...
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Online Access: | https://hal.science/hal-00270761 https://hal.science/hal-00270761/document https://hal.science/hal-00270761/file/Gulev2007.pdf https://doi.org/10.1016/j.ocemod.2007.07.004 |
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ftmeteofrance:oai:HAL:hal-00270761v1 2024-05-19T07:43:35+00:00 Impact of spatial resolution on simulated surface water mass transformations in the Atlantic Gulev, Sergei K. Barnier, Bernard Molines, Jean-Marc Penduff, Thierry Chanut, Jérôme P.P. Shirshov Institute of Oceanology (SIO) Russian Academy of Sciences Moscow (RAS) 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) Mercator Océan Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Service hydrographique et océanographique de la Marine-Centre National de la Recherche Scientifique (CNRS)-Météo-France 2007 https://hal.science/hal-00270761 https://hal.science/hal-00270761/document https://hal.science/hal-00270761/file/Gulev2007.pdf https://doi.org/10.1016/j.ocemod.2007.07.004 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ocemod.2007.07.004 hal-00270761 https://hal.science/hal-00270761 https://hal.science/hal-00270761/document https://hal.science/hal-00270761/file/Gulev2007.pdf doi:10.1016/j.ocemod.2007.07.004 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1463-5003 Ocean Modelling https://hal.science/hal-00270761 Ocean Modelling, 2007, 19, pp.138-160. ⟨10.1016/j.ocemod.2007.07.004⟩ [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/article Journal articles 2007 ftmeteofrance https://doi.org/10.1016/j.ocemod.2007.07.004 2024-05-02T00:04:11Z International audience We analyze the water mass transformation in coarse (1°) and high (1/6°) resolution ocean simulations with the identical configuration of the CLIPPER model and interannual ERA15 forcing function. Climatological characteristics of surface water mass transformation in the two experiments are quite different. The high resolution experiment exhibits a stronger surface transformation in equatorial and tropical regions, in the Gulf Stream area and in the location of the formation of Subtropical Mode Water (STMW), associated with high levels of eddy kinetic energy. The coarse resolution experiment shows a better representation of the transformation rates corresponding to the densest subpolar mode waters and Labrador Sea Water (LSW). This is explained by the differences in lateral mixing procedures between high and coarse resolution experiments. The high resolution 1/6° run is eddy-resolving only in the tropics and mid-latitudes. In these areas eddies are found to enhance the process of water mass transformation compared to the isopycnal diffusion used to parameterized the eddies in the 1° model. Despite its 1/6° resolution, the high resolution model does not adequately represent eddies in the subpolar gyre and Labrador Sea. In these areas the high resolution model fails to correctly simulate water mass transformation because the lateral mixing (provided through the bi-harmonic sub-gridscale parameterization) of newly ventilated waters with surrounding waters is not efficient enough. In contrast in the coarse 1° resolution model, the strong lateral mixing and the unrealistically broad boundary currents imposed by the high diffusivity required for numerical stability mixes newly formed LSW waters with the warmer and saltier waters of the rim current. Finally, it results in a more effective representation of the surface water mass transformation in high latitudes in the 1° model. A possible impact of the increased lateral diffusion in high resolution experiment on the representation of ... Article in Journal/Newspaper Labrador Sea Météo-France: HAL Ocean Modelling 19 3-4 138 160 |
institution |
Open Polar |
collection |
Météo-France: HAL |
op_collection_id |
ftmeteofrance |
language |
English |
topic |
[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 |
[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] Gulev, Sergei K. Barnier, Bernard Molines, Jean-Marc Penduff, Thierry Chanut, Jérôme Impact of spatial resolution on simulated surface water mass transformations in the Atlantic |
topic_facet |
[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 |
International audience We analyze the water mass transformation in coarse (1°) and high (1/6°) resolution ocean simulations with the identical configuration of the CLIPPER model and interannual ERA15 forcing function. Climatological characteristics of surface water mass transformation in the two experiments are quite different. The high resolution experiment exhibits a stronger surface transformation in equatorial and tropical regions, in the Gulf Stream area and in the location of the formation of Subtropical Mode Water (STMW), associated with high levels of eddy kinetic energy. The coarse resolution experiment shows a better representation of the transformation rates corresponding to the densest subpolar mode waters and Labrador Sea Water (LSW). This is explained by the differences in lateral mixing procedures between high and coarse resolution experiments. The high resolution 1/6° run is eddy-resolving only in the tropics and mid-latitudes. In these areas eddies are found to enhance the process of water mass transformation compared to the isopycnal diffusion used to parameterized the eddies in the 1° model. Despite its 1/6° resolution, the high resolution model does not adequately represent eddies in the subpolar gyre and Labrador Sea. In these areas the high resolution model fails to correctly simulate water mass transformation because the lateral mixing (provided through the bi-harmonic sub-gridscale parameterization) of newly ventilated waters with surrounding waters is not efficient enough. In contrast in the coarse 1° resolution model, the strong lateral mixing and the unrealistically broad boundary currents imposed by the high diffusivity required for numerical stability mixes newly formed LSW waters with the warmer and saltier waters of the rim current. Finally, it results in a more effective representation of the surface water mass transformation in high latitudes in the 1° model. A possible impact of the increased lateral diffusion in high resolution experiment on the representation of ... |
author2 |
P.P. Shirshov Institute of Oceanology (SIO) Russian Academy of Sciences Moscow (RAS) 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) Mercator Océan Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Service hydrographique et océanographique de la Marine-Centre National de la Recherche Scientifique (CNRS)-Météo-France |
format |
Article in Journal/Newspaper |
author |
Gulev, Sergei K. Barnier, Bernard Molines, Jean-Marc Penduff, Thierry Chanut, Jérôme |
author_facet |
Gulev, Sergei K. Barnier, Bernard Molines, Jean-Marc Penduff, Thierry Chanut, Jérôme |
author_sort |
Gulev, Sergei K. |
title |
Impact of spatial resolution on simulated surface water mass transformations in the Atlantic |
title_short |
Impact of spatial resolution on simulated surface water mass transformations in the Atlantic |
title_full |
Impact of spatial resolution on simulated surface water mass transformations in the Atlantic |
title_fullStr |
Impact of spatial resolution on simulated surface water mass transformations in the Atlantic |
title_full_unstemmed |
Impact of spatial resolution on simulated surface water mass transformations in the Atlantic |
title_sort |
impact of spatial resolution on simulated surface water mass transformations in the atlantic |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00270761 https://hal.science/hal-00270761/document https://hal.science/hal-00270761/file/Gulev2007.pdf https://doi.org/10.1016/j.ocemod.2007.07.004 |
genre |
Labrador Sea |
genre_facet |
Labrador Sea |
op_source |
ISSN: 1463-5003 Ocean Modelling https://hal.science/hal-00270761 Ocean Modelling, 2007, 19, pp.138-160. ⟨10.1016/j.ocemod.2007.07.004⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ocemod.2007.07.004 hal-00270761 https://hal.science/hal-00270761 https://hal.science/hal-00270761/document https://hal.science/hal-00270761/file/Gulev2007.pdf doi:10.1016/j.ocemod.2007.07.004 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.ocemod.2007.07.004 |
container_title |
Ocean Modelling |
container_volume |
19 |
container_issue |
3-4 |
container_start_page |
138 |
op_container_end_page |
160 |
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1799483313506746368 |