An Argo-Derived Background Diffusivity Parameterization for Improved Ocean Simulations in the Tropical Pacific

doi:10.1002/2017GL076269

	An Argo-Derived Background Diffusivity Parameterization for Improved Ocean Simulations in the Tropical Pacific
	Zhu, Yuchao 1,2; Zhang, Rong-Hua 1,2,3
刊名	GEOPHYSICAL RESEARCH LETTERS
	2018-02-16
卷号	45 期号:3 页码:1509-1517
关键词	Fine-scale Parameterizations Diapycnal Diffusivity Mom5
ISSN号	0094-8276
DOI	10.1002/2017GL076269
文献子类	Article
英文摘要	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.
WOS关键词	COUPLED CLIMATE MODEL ; TURBULENT DISSIPATION ; FINESCALE PARAMETERIZATIONS ; GENERAL-CIRCULATION ; EQUATORIAL PACIFIC ; INTERNAL WAVES ; SOUTHERN-OCEAN ; FINE-STRUCTURE ; COLD-TONGUE ; BIASES
WOS研究方向	Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000426161800037
资助机构	CAS ; Western Pacific Ocean System(XDA11010105 ; National Natural Science Foundation of China (NFSC)(41690122 ; Qingdao National Laboratory for Marine Science Technology(2015ASTP) ; Taishan Scholarship ; Recruitment Program of Global Experts ; XDA11020306) ; 41690120 ; 41475101 ; 41421005)
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn/handle/337004/10661]
专题	中国科学院青岛生物能源与过程研究所
通讯作者	Zhang, Rong-Hua
作者单位	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
推荐引用方式 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.