Horizontal Residual Mean: Addressing the Limited Spatial Resolution of Ocean Models
International audience Horizontal fluxes of heat and other scalar quantities in the ocean are due to correlations between the horizontal velocity and tracer fields. However, the limited spatial resolution of ocean models means that these correlations are not fully resolved using the velocity and tem...
Published in: | Journal of Physical Oceanography |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2019
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Online Access: | https://hal.sorbonne-universite.fr/hal-02344862 https://hal.sorbonne-universite.fr/hal-02344862/document https://hal.sorbonne-universite.fr/hal-02344862/file/jpo-d-19-0092.1.pdf https://doi.org/10.1175/JPO-D-19-0092.1 |
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ftepunivpsaclay:oai:HAL:hal-02344862v1 |
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Open Polar |
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École Polytechnique, Université Paris-Saclay: HAL |
op_collection_id |
ftepunivpsaclay |
language |
English |
topic |
Subgrid-scale processes [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [INFO]Computer Science [cs] |
spellingShingle |
Subgrid-scale processes [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [INFO]Computer Science [cs] Li, Yuehua Mcdougall, Trevor J. Keating, Shane de Lavergne, Casimir Madec, Gurvan Horizontal Residual Mean: Addressing the Limited Spatial Resolution of Ocean Models |
topic_facet |
Subgrid-scale processes [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [INFO]Computer Science [cs] |
description |
International audience Horizontal fluxes of heat and other scalar quantities in the ocean are due to correlations between the horizontal velocity and tracer fields. However, the limited spatial resolution of ocean models means that these correlations are not fully resolved using the velocity and temperature evaluated on the model grid, due to the limited spatial resolution and the boxcar-averaged nature of the velocity and the scalar field. In this article, a method of estimating the horizontal flux due to unresolved spatial correlations is proposed, based on the depth-integrated horizontal transport from the seafloor to the density surface whose spatially averaged height is the height of the calculation. This depth-integrated horizontal transport takes into account the subgrid velocity and density variations to compensate the standard estimate of horizontal transport based on staircase-like velocity and density. It is not a parameterization of unresolved eddies, since it utilizes data available in ocean models without relying on any presumed parameter such as dif-fusivity. The method is termed the horizontal residual mean (HRM). The method is capable of estimating the spatial-correlation-induced water transport in a 1/48 global ocean model, using model data smoothed to 3/48. The HRM extra overturning has a peak in the Southern Ocean of about 1.5 Sv (1 Sv [ 10 6 m 3 s 21). This indicates an extra heat transport of 0.015 PW on average in the same area. It is expected that implementing the scheme in a coarse-resolution ocean model will improve its representation of lateral heat fluxes. |
author2 |
University of New South Wales Sydney (UNSW) Nucleus for European Modeling of the Ocean (NEMO R&D ) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) |
format |
Article in Journal/Newspaper |
author |
Li, Yuehua Mcdougall, Trevor J. Keating, Shane de Lavergne, Casimir Madec, Gurvan |
author_facet |
Li, Yuehua Mcdougall, Trevor J. Keating, Shane de Lavergne, Casimir Madec, Gurvan |
author_sort |
Li, Yuehua |
title |
Horizontal Residual Mean: Addressing the Limited Spatial Resolution of Ocean Models |
title_short |
Horizontal Residual Mean: Addressing the Limited Spatial Resolution of Ocean Models |
title_full |
Horizontal Residual Mean: Addressing the Limited Spatial Resolution of Ocean Models |
title_fullStr |
Horizontal Residual Mean: Addressing the Limited Spatial Resolution of Ocean Models |
title_full_unstemmed |
Horizontal Residual Mean: Addressing the Limited Spatial Resolution of Ocean Models |
title_sort |
horizontal residual mean: addressing the limited spatial resolution of ocean models |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.sorbonne-universite.fr/hal-02344862 https://hal.sorbonne-universite.fr/hal-02344862/document https://hal.sorbonne-universite.fr/hal-02344862/file/jpo-d-19-0092.1.pdf https://doi.org/10.1175/JPO-D-19-0092.1 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.sorbonne-universite.fr/hal-02344862 Journal of Physical Oceanography, 2019, 49 (11), pp.2741-2759. ⟨10.1175/JPO-D-19-0092.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/JPO-D-19-0092.1 hal-02344862 https://hal.sorbonne-universite.fr/hal-02344862 https://hal.sorbonne-universite.fr/hal-02344862/document https://hal.sorbonne-universite.fr/hal-02344862/file/jpo-d-19-0092.1.pdf doi:10.1175/JPO-D-19-0092.1 WOS: 000490741900001 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/JPO-D-19-0092.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
49 |
container_issue |
11 |
container_start_page |
2741 |
op_container_end_page |
2759 |
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spelling |
ftepunivpsaclay:oai:HAL:hal-02344862v1 2024-05-19T07:48:59+00:00 Horizontal Residual Mean: Addressing the Limited Spatial Resolution of Ocean Models Li, Yuehua Mcdougall, Trevor J. Keating, Shane de Lavergne, Casimir Madec, Gurvan University of New South Wales Sydney (UNSW) Nucleus for European Modeling of the Ocean (NEMO R&D ) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) 2019-11 https://hal.sorbonne-universite.fr/hal-02344862 https://hal.sorbonne-universite.fr/hal-02344862/document https://hal.sorbonne-universite.fr/hal-02344862/file/jpo-d-19-0092.1.pdf https://doi.org/10.1175/JPO-D-19-0092.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/JPO-D-19-0092.1 hal-02344862 https://hal.sorbonne-universite.fr/hal-02344862 https://hal.sorbonne-universite.fr/hal-02344862/document https://hal.sorbonne-universite.fr/hal-02344862/file/jpo-d-19-0092.1.pdf doi:10.1175/JPO-D-19-0092.1 WOS: 000490741900001 info:eu-repo/semantics/OpenAccess ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.sorbonne-universite.fr/hal-02344862 Journal of Physical Oceanography, 2019, 49 (11), pp.2741-2759. ⟨10.1175/JPO-D-19-0092.1⟩ Subgrid-scale processes [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [INFO]Computer Science [cs] info:eu-repo/semantics/article Journal articles 2019 ftepunivpsaclay https://doi.org/10.1175/JPO-D-19-0092.1 2024-04-25T00:50:03Z International audience Horizontal fluxes of heat and other scalar quantities in the ocean are due to correlations between the horizontal velocity and tracer fields. However, the limited spatial resolution of ocean models means that these correlations are not fully resolved using the velocity and temperature evaluated on the model grid, due to the limited spatial resolution and the boxcar-averaged nature of the velocity and the scalar field. In this article, a method of estimating the horizontal flux due to unresolved spatial correlations is proposed, based on the depth-integrated horizontal transport from the seafloor to the density surface whose spatially averaged height is the height of the calculation. This depth-integrated horizontal transport takes into account the subgrid velocity and density variations to compensate the standard estimate of horizontal transport based on staircase-like velocity and density. It is not a parameterization of unresolved eddies, since it utilizes data available in ocean models without relying on any presumed parameter such as dif-fusivity. The method is termed the horizontal residual mean (HRM). The method is capable of estimating the spatial-correlation-induced water transport in a 1/48 global ocean model, using model data smoothed to 3/48. The HRM extra overturning has a peak in the Southern Ocean of about 1.5 Sv (1 Sv [ 10 6 m 3 s 21). This indicates an extra heat transport of 0.015 PW on average in the same area. It is expected that implementing the scheme in a coarse-resolution ocean model will improve its representation of lateral heat fluxes. Article in Journal/Newspaper Southern Ocean École Polytechnique, Université Paris-Saclay: HAL Journal of Physical Oceanography 49 11 2741 2759 |