IOCAS-IR  > 海洋环流与波动重点实验室
A Modified Vertical Mixing Parameterization for Its Improved Ocean and Coupled Simulations in the Tropical Pacific
Zhu, Yuchao1,2,3; Zhang, Rong-Hua1,2,3,4
2019
Source PublicationJOURNAL OF PHYSICAL OCEANOGRAPHY
ISSN0022-3670
Volume49Issue:1Pages:21-37
Corresponding AuthorZhang, Rong-Hua(rzhang@qdio.ac.cn)
AbstractClimate models suffer from significant biases over the tropical Pacific Ocean, including a too-cold cold tongue and too-warm temperature at the depth of the thermocline. The emergence of model biases can be partly attributed to vertical mixing parameterizations, in which there are great uncertainties in selections of functional forms and empirical parameters. In this paper, the impacts of two different vertical mixing schemes on the tropical Pacific temperature simulations are investigated using version 5 of the Modular Ocean Model (MOM5). One vertical mixing scheme is the widely used K-profile parameterization (KPP) scheme, and the other is a hybrid mixing scheme (the Chen scheme) by combining a Kraus-Turner-type bulk mixed layer (ML) model with Peters et al.'s shear instability mixing model (PGT model). It is shown that the Chen scheme works better than the KPP scheme for SST simulation but produces an exaggerated subsurface warm bias simultaneously. The better SST simulation can be attributed to the employment of the PGT model, which produces lower levels of shear instability mixing than its counterpart in the KPP scheme. Furthermore, a modified KPP scheme is presented in which its shear instability mixing model and constant background diffusivity are replaced by the PGT model and the Argo-derived background diffusivity, respectively. This new scheme is then employed into MOM5-based ocean-only and coupled simulations, demonstrating substantial improvements in temperature simulations over the tropical Pacific. The modified KPP scheme can be easily employed into other ocean models, offering an effective way to improve ocean simulations.
KeywordClimate models Ocean models Parameterization
DOI10.1175/JPO-D-18-0100.1
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China [NFSC][41690122(41690120)] ; National Natural Science Foundation of China [NFSC][41475101] ; National Natural Science Foundation of China [NFSC][41490644(41490640)] ; NSFC-Shandong Joint Fund for Marine Science Research Centers[U1406402] ; Taishan Scholarship
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000453535300002
PublisherAMER METEOROLOGICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/159949
Collection海洋环流与波动重点实验室
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.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China
4.Pilot 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. A Modified Vertical Mixing Parameterization for Its Improved Ocean and Coupled Simulations in the Tropical Pacific[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2019,49(1):21-37.
APA Zhu, Yuchao,&Zhang, Rong-Hua.(2019).A Modified Vertical Mixing Parameterization for Its Improved Ocean and Coupled Simulations in the Tropical Pacific.JOURNAL OF PHYSICAL OCEANOGRAPHY,49(1),21-37.
MLA Zhu, Yuchao,et al."A Modified Vertical Mixing Parameterization for Its Improved Ocean and Coupled Simulations in the Tropical Pacific".JOURNAL OF PHYSICAL OCEANOGRAPHY 49.1(2019):21-37.
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