An Argo-Derived Background Diffusivity Parameterization for Improved Ocean Simulations in the Tropical Pacific
Model biases are substantial in ocean and coupled ocean-atmosphere simulations in the tropical Pacific Ocean, including a too cold tongue and too diffuse thermocline. These biases can be partly attributed to vertical mixing parameterizations in which the background diffusivity depiction has great un...
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Online Access: | http://ir.qdio.ac.cn/handle/337002/158099 https://doi.org/10.1002/2017GL076269 |
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/158099 2023-05-15T18:25:31+02:00 An Argo-Derived Background Diffusivity Parameterization for Improved Ocean Simulations in the Tropical Pacific Zhu, Yuchao Zhang, Rong-Hua 2018-02-16 http://ir.qdio.ac.cn/handle/337002/158099 https://doi.org/10.1002/2017GL076269 英语 eng AMER GEOPHYSICAL UNION GEOPHYSICAL RESEARCH LETTERS http://ir.qdio.ac.cn/handle/337002/158099 doi:10.1002/2017GL076269 fine-scale parameterizations diapycnal diffusivity MOM5 Geology Geosciences Multidisciplinary COUPLED CLIMATE MODEL TURBULENT DISSIPATION FINESCALE PARAMETERIZATIONS GENERAL-CIRCULATION EQUATORIAL PACIFIC INTERNAL WAVES SOUTHERN-OCEAN FINE-STRUCTURE COLD-TONGUE BIASES 期刊论文 2018 ftchinacasciocas https://doi.org/10.1002/2017GL076269 2022-06-27T05:39:38Z Model biases are substantial in ocean and coupled ocean-atmosphere simulations in the tropical Pacific Ocean, including a too cold tongue and too diffuse thermocline. These biases can be partly attributed to vertical mixing parameterizations in which the background diffusivity depiction has great uncertainties. Here based on the fine-scale parameterization, the Argo data are used to derive the spatially varying background diffusivity, with a magnitude of O(10(-6) m(2) s(-1)) in the most area of tropical Pacific. This new scheme is then employed into the version 5.1 of the Modular Ocean Model-based ocean-only and coupled models, resulting in substantial improvements in ocean simulations, including a more realistic cold tongue and equatorial thermocline. The improved simulations can be attributed to the reduced cooling effects induced by weakened equatorial upwelling. Additionally, the subsurface cooling effect is attributed to the reduced heat transfer from the upper layer to the subsurface layer and the convergence of the colder water from off the equator. Report Southern Ocean Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Pacific Southern Ocean Geophysical Research Letters 45 3 1509 1517 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
fine-scale parameterizations diapycnal diffusivity MOM5 Geology Geosciences Multidisciplinary COUPLED CLIMATE MODEL TURBULENT DISSIPATION FINESCALE PARAMETERIZATIONS GENERAL-CIRCULATION EQUATORIAL PACIFIC INTERNAL WAVES SOUTHERN-OCEAN FINE-STRUCTURE COLD-TONGUE BIASES |
spellingShingle |
fine-scale parameterizations diapycnal diffusivity MOM5 Geology Geosciences Multidisciplinary COUPLED CLIMATE MODEL TURBULENT DISSIPATION FINESCALE PARAMETERIZATIONS GENERAL-CIRCULATION EQUATORIAL PACIFIC INTERNAL WAVES SOUTHERN-OCEAN FINE-STRUCTURE COLD-TONGUE BIASES Zhu, Yuchao Zhang, Rong-Hua An Argo-Derived Background Diffusivity Parameterization for Improved Ocean Simulations in the Tropical Pacific |
topic_facet |
fine-scale parameterizations diapycnal diffusivity MOM5 Geology Geosciences Multidisciplinary COUPLED CLIMATE MODEL TURBULENT DISSIPATION FINESCALE PARAMETERIZATIONS GENERAL-CIRCULATION EQUATORIAL PACIFIC INTERNAL WAVES SOUTHERN-OCEAN FINE-STRUCTURE COLD-TONGUE BIASES |
description |
Model biases are substantial in ocean and coupled ocean-atmosphere simulations in the tropical Pacific Ocean, including a too cold tongue and too diffuse thermocline. These biases can be partly attributed to vertical mixing parameterizations in which the background diffusivity depiction has great uncertainties. Here based on the fine-scale parameterization, the Argo data are used to derive the spatially varying background diffusivity, with a magnitude of O(10(-6) m(2) s(-1)) in the most area of tropical Pacific. This new scheme is then employed into the version 5.1 of the Modular Ocean Model-based ocean-only and coupled models, resulting in substantial improvements in ocean simulations, including a more realistic cold tongue and equatorial thermocline. The improved simulations can be attributed to the reduced cooling effects induced by weakened equatorial upwelling. Additionally, the subsurface cooling effect is attributed to the reduced heat transfer from the upper layer to the subsurface layer and the convergence of the colder water from off the equator. |
format |
Report |
author |
Zhu, Yuchao Zhang, Rong-Hua |
author_facet |
Zhu, Yuchao Zhang, Rong-Hua |
author_sort |
Zhu, Yuchao |
title |
An Argo-Derived Background Diffusivity Parameterization for Improved Ocean Simulations in the Tropical Pacific |
title_short |
An Argo-Derived Background Diffusivity Parameterization for Improved Ocean Simulations in the Tropical Pacific |
title_full |
An Argo-Derived Background Diffusivity Parameterization for Improved Ocean Simulations in the Tropical Pacific |
title_fullStr |
An Argo-Derived Background Diffusivity Parameterization for Improved Ocean Simulations in the Tropical Pacific |
title_full_unstemmed |
An Argo-Derived Background Diffusivity Parameterization for Improved Ocean Simulations in the Tropical Pacific |
title_sort |
argo-derived background diffusivity parameterization for improved ocean simulations in the tropical pacific |
publisher |
AMER GEOPHYSICAL UNION |
publishDate |
2018 |
url |
http://ir.qdio.ac.cn/handle/337002/158099 https://doi.org/10.1002/2017GL076269 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
GEOPHYSICAL RESEARCH LETTERS http://ir.qdio.ac.cn/handle/337002/158099 doi:10.1002/2017GL076269 |
op_doi |
https://doi.org/10.1002/2017GL076269 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
3 |
container_start_page |
1509 |
op_container_end_page |
1517 |
_version_ |
1766207036165455872 |