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| An Argo-Derived Background Diffusivity Parameterization for Improved Ocean Simulations in the Tropical Pacific | |
Zhu, Yuchao1,2 ; Zhang, Rong-Hua1,2,3
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| 2018-02-16 | |
| Source Publication | GEOPHYSICAL RESEARCH LETTERS
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| ISSN | 0094-8276 |
| Volume | 45Issue:3Pages:1509-1517 |
| Corresponding Author | Zhang, Rong-Hua(rzhang@qdio.ac.cn) |
| Abstract | 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. |
| Keyword | fine-scale parameterizations diapycnal diffusivity MOM5 |
| DOI | 10.1002/2017GL076269 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | CAS ; 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 Area | Geology |
| WOS Subject | Geosciences, Multidisciplinary |
| WOS ID | WOS:000426161800037 |
| Publisher | AMER GEOPHYSICAL UNION |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.qdio.ac.cn/handle/337002/158101 |
| Collection | 中国科学院海洋研究所 |
| Corresponding Author | Zhang, Rong-Hua |
| Affiliation | 1.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 Affilication | Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences |
| Corresponding Author Affilication | Key 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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