Parameterization of subgrid stirring in eddy resolving ocean models. Part 1: Theory and diagnostics
International audience Horizontal stirring by time-varying mesoscale flows contributes to forming submesoscale tracer filaments. In this paper, we propose a parameterization of the passive transport associated with filamentation by mesoscale flows for use in O(10 km) resolution ocean models. Theoret...
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ftunivnantes:oai:HAL:hal-00755145v1 2023-05-15T18:25:29+02:00 Parameterization of subgrid stirring in eddy resolving ocean models. Part 1: Theory and diagnostics Le Sommer, Julien d'Ovidio, Francesco Madec, Gurvan Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2011 https://hal.science/hal-00755145 https://doi.org/10.1016/J.OCEMOD.2011.03.007 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/J.OCEMOD.2011.03.007 hal-00755145 https://hal.science/hal-00755145 BIBCODE: 2011OcMod.39.154L doi:10.1016/J.OCEMOD.2011.03.007 ISSN: 1463-5003 Ocean Modelling https://hal.science/hal-00755145 Ocean Modelling, 2011, 39, pp.154-169. ⟨10.1016/J.OCEMOD.2011.03.007⟩ [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2011 ftunivnantes https://doi.org/10.1016/J.OCEMOD.2011.03.007 2023-02-08T00:20:16Z International audience Horizontal stirring by time-varying mesoscale flows contributes to forming submesoscale tracer filaments. In this paper, we propose a parameterization of the passive transport associated with filamentation by mesoscale flows for use in O(10 km) resolution ocean models. Theoretical motivations are provided for modelling subgrid stirring by the resolved mesoscale flows with an anisotropic generalization of Smagorinsky operator. For level coordinate models, an isoneutral formulation of the proposed subgrid operator is provided. The proposed subgrid operator is diagnosed with DRAKKAR global 1/4° eddy-resolving model output. In the Southern Ocean, the parameterization is shown to provide diffusivities peaking at about 400 m 2 s -1 . If applied prognostically, the proposed subgrid operator could drive meridional heat transports of about .5PW at 45°S. This suggests that a significant fraction of the transport by mesoscale flows could be associated with tracer features of scale smaller than our model grid size (˜20 km at 45°S). A large contribution to this transport is associated with differential advection by the time-mean flow at subgrid scale. Article in Journal/Newspaper Southern Ocean Université de Nantes: HAL-UNIV-NANTES Southern Ocean Ocean Modelling 39 1-2 154 169 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Le Sommer, Julien d'Ovidio, Francesco Madec, Gurvan Parameterization of subgrid stirring in eddy resolving ocean models. Part 1: Theory and diagnostics |
topic_facet |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience Horizontal stirring by time-varying mesoscale flows contributes to forming submesoscale tracer filaments. In this paper, we propose a parameterization of the passive transport associated with filamentation by mesoscale flows for use in O(10 km) resolution ocean models. Theoretical motivations are provided for modelling subgrid stirring by the resolved mesoscale flows with an anisotropic generalization of Smagorinsky operator. For level coordinate models, an isoneutral formulation of the proposed subgrid operator is provided. The proposed subgrid operator is diagnosed with DRAKKAR global 1/4° eddy-resolving model output. In the Southern Ocean, the parameterization is shown to provide diffusivities peaking at about 400 m 2 s -1 . If applied prognostically, the proposed subgrid operator could drive meridional heat transports of about .5PW at 45°S. This suggests that a significant fraction of the transport by mesoscale flows could be associated with tracer features of scale smaller than our model grid size (˜20 km at 45°S). A large contribution to this transport is associated with differential advection by the time-mean flow at subgrid scale. |
author2 |
Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Le Sommer, Julien d'Ovidio, Francesco Madec, Gurvan |
author_facet |
Le Sommer, Julien d'Ovidio, Francesco Madec, Gurvan |
author_sort |
Le Sommer, Julien |
title |
Parameterization of subgrid stirring in eddy resolving ocean models. Part 1: Theory and diagnostics |
title_short |
Parameterization of subgrid stirring in eddy resolving ocean models. Part 1: Theory and diagnostics |
title_full |
Parameterization of subgrid stirring in eddy resolving ocean models. Part 1: Theory and diagnostics |
title_fullStr |
Parameterization of subgrid stirring in eddy resolving ocean models. Part 1: Theory and diagnostics |
title_full_unstemmed |
Parameterization of subgrid stirring in eddy resolving ocean models. Part 1: Theory and diagnostics |
title_sort |
parameterization of subgrid stirring in eddy resolving ocean models. part 1: theory and diagnostics |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.science/hal-00755145 https://doi.org/10.1016/J.OCEMOD.2011.03.007 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 1463-5003 Ocean Modelling https://hal.science/hal-00755145 Ocean Modelling, 2011, 39, pp.154-169. ⟨10.1016/J.OCEMOD.2011.03.007⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/J.OCEMOD.2011.03.007 hal-00755145 https://hal.science/hal-00755145 BIBCODE: 2011OcMod.39.154L doi:10.1016/J.OCEMOD.2011.03.007 |
op_doi |
https://doi.org/10.1016/J.OCEMOD.2011.03.007 |
container_title |
Ocean Modelling |
container_volume |
39 |
container_issue |
1-2 |
container_start_page |
154 |
op_container_end_page |
169 |
_version_ |
1766206971988410368 |