Subsurface Warm Biases in the Tropical Atlantic and Their Attributions to the Role of Wind Forcing and Ocean Vertical Mixing

doi:10.1175/JCLI-D-21-0779.1

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Subsurface Warm Biases in the Tropical Atlantic and Their Attributions to the Role of Wind Forcing and Ocean Vertical Mixing
	Zhang, Qiushi 1,2,5; Zhu, Yuchao 1,2,4,5; Zhang, Rong-Hua 1,2,3,4,5
刊名	JOURNAL OF CLIMATE
	2022-04-01
卷号	35 期号:7 页码:2291-2303
关键词	Model errors Model evaluation/performance Ocean models Parameterization Mixing
ISSN号	0894-8755
DOI	10.1175/JCLI-D-21-0779.1
通讯作者	Zhang, Rong-Hua(rzhang@qdio.ac.cn)
英文摘要	Realistic ocean subsurface simulations of thermal structure and variation are critically important to success in climate prediction and projection; currently, substantial systematic subsurface biases still exist in the state-of-the-art ocean and climate models. In this paper, subsurface biases in the tropical Atlantic Ocean (TA) are investigated by analyzing simulations from the Ocean Model Intercomparison Project (OMIP) and conducting ocean-only experiments that are based on the Parallel Ocean Program, version 2 (POP2). The subsurface biases are prominent in almost all OMIP simulations, characterized by two warm-bias patches off the equator. By conducting two groups of POP2-based ocean-only experiments, two potential origins of the biases are explored, including uncertainties in wind forcing and vertical mixing parameterization, respectively. It is illustrated that the warm bias near 10 degrees N can be slightly reduced by modulating the prescribed wind field, and the warm biases over the entire basin are significantly reduced by reducing background diffusivity in the ocean interior in ways to match observations. By conducting a heat-budget analysis, it is found that the improved subsurface simulations are attributed to the enhanced cooling effect by constraining the vertical mixing diffusivity in terms of the observational estimate, implying that overestimation of vertical mixing is primarily responsible for the subsurface warm biases in the TA. Since the climate simulation is very sensitive to the vertical mixing parameterization, more accurate representations of ocean vertical mixing are clearly needed in ocean and climate models.
资助项目	National Natural Science Foundation of China[41906007] ; National Natural Science Foundation of China[42030410] ; National Natural Science Foundation of China[41690122(41690120)] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB 40000000] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB 42000000] ; OMIP ; ESGF
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER METEOROLOGICAL SOC
WOS记录号	WOS:000799231300012
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/179299]
专题	海洋研究所_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, Ctr Ocean Megasci, Qingdao, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao, Peoples R China 5.Chinese Acad Sci, CAS Key Lab Ocean Circulat & Waves, Inst Oceanol, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qiushi,Zhu, Yuchao,Zhang, Rong-Hua. Subsurface Warm Biases in the Tropical Atlantic and Their Attributions to the Role of Wind Forcing and Ocean Vertical Mixing[J]. JOURNAL OF CLIMATE,2022,35(7):2291-2303.
APA	Zhang, Qiushi,Zhu, Yuchao,&Zhang, Rong-Hua.(2022).Subsurface Warm Biases in the Tropical Atlantic and Their Attributions to the Role of Wind Forcing and Ocean Vertical Mixing.JOURNAL OF CLIMATE,35(7),2291-2303.
MLA	Zhang, Qiushi,et al."Subsurface Warm Biases in the Tropical Atlantic and Their Attributions to the Role of Wind Forcing and Ocean Vertical Mixing".JOURNAL OF CLIMATE 35.7(2022):2291-2303.