IOCAS-IR
An Argo-Derived Background Diffusivity Parameterization for Improved Ocean Simulations in the Tropical Pacific
Zhu, Yuchao1,2; Zhang, Rong-Hua1,2,3
2018-02-16
Source PublicationGEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
Volume45Issue:3Pages:1509-1517
Corresponding AuthorZhang, Rong-Hua(rzhang@qdio.ac.cn)
AbstractModel 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.
Keywordfine-scale parameterizations diapycnal diffusivity MOM5
DOI10.1002/2017GL076269
Indexed BySCI
Language英语
Funding ProjectCAS ; Western Pacific Ocean System[XDA11010105] ; Western Pacific Ocean System[XDA11020306] ; National Natural Science Foundation of China (NFSC)[41690122] ; National Natural Science Foundation of China (NFSC)[41690120] ; National Natural Science Foundation of China (NFSC)[41475101] ; National Natural Science Foundation of China (NFSC)[41421005] ; Qingdao National Laboratory for Marine Science Technology[2015ASTP] ; Taishan Scholarship ; Recruitment Program of Global Experts
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000426161800037
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/158101
Collection中国科学院海洋研究所
Corresponding AuthorZhang, Rong-Hua
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Qingdao, Peoples R China
First Author AffilicationKey Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhu, Yuchao,Zhang, Rong-Hua. An Argo-Derived Background Diffusivity Parameterization for Improved Ocean Simulations in the Tropical Pacific[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(3):1509-1517.
APA Zhu, Yuchao,&Zhang, Rong-Hua.(2018).An Argo-Derived Background Diffusivity Parameterization for Improved Ocean Simulations in the Tropical Pacific.GEOPHYSICAL RESEARCH LETTERS,45(3),1509-1517.
MLA Zhu, Yuchao,et al."An Argo-Derived Background Diffusivity Parameterization for Improved Ocean Simulations in the Tropical Pacific".GEOPHYSICAL RESEARCH LETTERS 45.3(2018):1509-1517.
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