An Improved Parameterization of Wind‐Driven Turbulent Vertical Mixing Based on an Eddy‐Resolving Climate Model
Abstract Turbulent vertical mixing in the stratified ocean interior has a huge impact on global ocean circulations and the climate system. Although parameterizations of vertical mixing furnished by internal tides have been built into state‐of‐the‐art coupled global climate models (CGCMs), efforts in...
Published in: | Journal of Advances in Modeling Earth Systems |
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American Geophysical Union (AGU)
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Online Access: | https://doi.org/10.1029/2021MS002630 https://doaj.org/article/3c39f0eb10404a5685ca62f301a775bf |
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ftdoajarticles:oai:doaj.org/article:3c39f0eb10404a5685ca62f301a775bf 2023-05-15T18:25:12+02:00 An Improved Parameterization of Wind‐Driven Turbulent Vertical Mixing Based on an Eddy‐Resolving Climate Model Man Yuan Zhuo Song Zhuoran Li Zhao Jing Ping Chang Bingrong Sun Hong Wang Xin Liu Shenghui Zhou Lixin Wu 2021-10-01T00:00:00Z https://doi.org/10.1029/2021MS002630 https://doaj.org/article/3c39f0eb10404a5685ca62f301a775bf EN eng American Geophysical Union (AGU) https://doi.org/10.1029/2021MS002630 https://doaj.org/toc/1942-2466 1942-2466 doi:10.1029/2021MS002630 https://doaj.org/article/3c39f0eb10404a5685ca62f301a775bf Journal of Advances in Modeling Earth Systems, Vol 13, Iss 10, Pp n/a-n/a (2021) ocean modeling turbulent mixing finescale parameterization near‐inertial internal waves coupled global climate model high resolution Physical geography GB3-5030 Oceanography GC1-1581 article 2021 ftdoajarticles https://doi.org/10.1029/2021MS002630 2022-12-31T10:03:22Z Abstract Turbulent vertical mixing in the stratified ocean interior has a huge impact on global ocean circulations and the climate system. Although parameterizations of vertical mixing furnished by internal tides have been built into state‐of‐the‐art coupled global climate models (CGCMs), efforts in parameterizing wind‐driven vertical mixing in CGCMs are still limited. In this study, we apply a modified finescale parameterization (MFP) to an eddy‐resolving Community Earth System Model (CESM) to represent the wind's contribution to vertical mixing in the stratified ocean interior. The spatial pattern of the MFP‐parameterized wind‐driven vertical mixing in the thermocline agrees with the observation derived from the finestructure measurements of Argo floats, reproducing the enhanced values in the Kuroshio, Gulf Stream extensions, and the Southern Ocean where the winds inject great amount of energy into the internal wave field. The MFP also captures the observed seasonal variation of wind‐driven vertical mixing in the thermocline of these regions that exhibits enhancement and weakening in winter and summer, respectively. Application of the MFP to a non‐eddy‐resolving CESM fails to reproduce the observed wind‐driven vertical mixing. Specifically, the magnitude of parameterized wind‐driven vertical mixing in the thermocline of Kuroshio, Gulf Stream extensions, and the Southern Ocean is systemically smaller than those in the observation and eddy‐resolving CESM; so is the case for the amplitude of seasonal cycle. The results highlight the benefit of eddy‐resolving CESM compared to its standard‐resolution counterpart in parameterizing the wind‐driven vertical mixing and provide insight into developing parameterizations for wind‐driven vertical mixing in eddy‐resolving CGCMs. Article in Journal/Newspaper Southern Ocean Directory of Open Access Journals: DOAJ Articles Southern Ocean Journal of Advances in Modeling Earth Systems 13 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ocean modeling turbulent mixing finescale parameterization near‐inertial internal waves coupled global climate model high resolution Physical geography GB3-5030 Oceanography GC1-1581 |
spellingShingle |
ocean modeling turbulent mixing finescale parameterization near‐inertial internal waves coupled global climate model high resolution Physical geography GB3-5030 Oceanography GC1-1581 Man Yuan Zhuo Song Zhuoran Li Zhao Jing Ping Chang Bingrong Sun Hong Wang Xin Liu Shenghui Zhou Lixin Wu An Improved Parameterization of Wind‐Driven Turbulent Vertical Mixing Based on an Eddy‐Resolving Climate Model |
topic_facet |
ocean modeling turbulent mixing finescale parameterization near‐inertial internal waves coupled global climate model high resolution Physical geography GB3-5030 Oceanography GC1-1581 |
description |
Abstract Turbulent vertical mixing in the stratified ocean interior has a huge impact on global ocean circulations and the climate system. Although parameterizations of vertical mixing furnished by internal tides have been built into state‐of‐the‐art coupled global climate models (CGCMs), efforts in parameterizing wind‐driven vertical mixing in CGCMs are still limited. In this study, we apply a modified finescale parameterization (MFP) to an eddy‐resolving Community Earth System Model (CESM) to represent the wind's contribution to vertical mixing in the stratified ocean interior. The spatial pattern of the MFP‐parameterized wind‐driven vertical mixing in the thermocline agrees with the observation derived from the finestructure measurements of Argo floats, reproducing the enhanced values in the Kuroshio, Gulf Stream extensions, and the Southern Ocean where the winds inject great amount of energy into the internal wave field. The MFP also captures the observed seasonal variation of wind‐driven vertical mixing in the thermocline of these regions that exhibits enhancement and weakening in winter and summer, respectively. Application of the MFP to a non‐eddy‐resolving CESM fails to reproduce the observed wind‐driven vertical mixing. Specifically, the magnitude of parameterized wind‐driven vertical mixing in the thermocline of Kuroshio, Gulf Stream extensions, and the Southern Ocean is systemically smaller than those in the observation and eddy‐resolving CESM; so is the case for the amplitude of seasonal cycle. The results highlight the benefit of eddy‐resolving CESM compared to its standard‐resolution counterpart in parameterizing the wind‐driven vertical mixing and provide insight into developing parameterizations for wind‐driven vertical mixing in eddy‐resolving CGCMs. |
format |
Article in Journal/Newspaper |
author |
Man Yuan Zhuo Song Zhuoran Li Zhao Jing Ping Chang Bingrong Sun Hong Wang Xin Liu Shenghui Zhou Lixin Wu |
author_facet |
Man Yuan Zhuo Song Zhuoran Li Zhao Jing Ping Chang Bingrong Sun Hong Wang Xin Liu Shenghui Zhou Lixin Wu |
author_sort |
Man Yuan |
title |
An Improved Parameterization of Wind‐Driven Turbulent Vertical Mixing Based on an Eddy‐Resolving Climate Model |
title_short |
An Improved Parameterization of Wind‐Driven Turbulent Vertical Mixing Based on an Eddy‐Resolving Climate Model |
title_full |
An Improved Parameterization of Wind‐Driven Turbulent Vertical Mixing Based on an Eddy‐Resolving Climate Model |
title_fullStr |
An Improved Parameterization of Wind‐Driven Turbulent Vertical Mixing Based on an Eddy‐Resolving Climate Model |
title_full_unstemmed |
An Improved Parameterization of Wind‐Driven Turbulent Vertical Mixing Based on an Eddy‐Resolving Climate Model |
title_sort |
improved parameterization of wind‐driven turbulent vertical mixing based on an eddy‐resolving climate model |
publisher |
American Geophysical Union (AGU) |
publishDate |
2021 |
url |
https://doi.org/10.1029/2021MS002630 https://doaj.org/article/3c39f0eb10404a5685ca62f301a775bf |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Journal of Advances in Modeling Earth Systems, Vol 13, Iss 10, Pp n/a-n/a (2021) |
op_relation |
https://doi.org/10.1029/2021MS002630 https://doaj.org/toc/1942-2466 1942-2466 doi:10.1029/2021MS002630 https://doaj.org/article/3c39f0eb10404a5685ca62f301a775bf |
op_doi |
https://doi.org/10.1029/2021MS002630 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
13 |
container_issue |
10 |
_version_ |
1766206462444437504 |