Institutional Repository of Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
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 | |
发表期刊 | JOURNAL OF PHYSICAL OCEANOGRAPHY |
ISSN | 0022-3670 |
卷号 | 49期号:1页码:21-37 |
通讯作者 | Zhang, Rong-Hua(rzhang@qdio.ac.cn) |
摘要 | Climate 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. |
关键词 | Climate models Ocean models Parameterization |
DOI | 10.1175/JPO-D-18-0100.1 |
收录类别 | SCI |
语种 | 英语 |
资助项目 | National 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 ; National 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研究方向 | Oceanography |
WOS类目 | Oceanography |
WOS记录号 | WOS:000453535300002 |
出版者 | AMER METEOROLOGICAL SOC |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.qdio.ac.cn/handle/337002/159949 |
专题 | 海洋环流与波动重点实验室 |
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.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol, Qingdao, Peoples R China |
第一作者单位 | 海洋环流与波动重点实验室 |
通讯作者单位 | 海洋环流与波动重点实验室 |
推荐引用方式 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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A Modified Vertical (3905KB) | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 |
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