气候变化领域集成服务门户(CCPortal): Impacts of the Atlantic warm pool on North American precipitation and global sea surface temperature in a coupled general circulation model

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DOI	10.1007/s00382-020-05527-5
	Impacts of the Atlantic warm pool on North American precipitation and global sea surface temperature in a coupled general circulation model
	Wang C.; Chen S.; Song Z.; Wang X.
发表日期	2021
ISSN	0930-7575
卷号	56 期号:2021-03-04
英文摘要	The responses of North American precipitation to the Atlantic warm pool (AWP) are investigated by using observational data and the NCAR Community Earth System Model. We show that the responses are controlled by different physical mechanisms in different seasons. In the warm season, a large AWP reduces the North Atlantic subtropical high, consistent with Gill’s physics. The corresponding influence over North America is northerly wind anomalies in the lower atmosphere, which leads to a precipitation suppression in the central United States. However, in the cold season the AWP’s impact on North American precipitation is operated via the teleconnection of cold SST anomalies in the tropical Pacific which are induced by the AWP. A large AWP enhances the local Hadley circulation that moves across the equator to the tropical southeastern Pacific in the boreal summer. This inter-hemispheric process strengthens the atmospheric sinking and then increases the South Pacific subtropical high, resulting in the enhancement of the surface easterly trade wind and thus cold SST anomalies in tropical southeastern Pacific. The wind-evaporation-SST and Bjerknes feedbacks further lead tropical central Pacific SST to a La Niña-like pattern, which is consistent with that the significant and negative correlation between ENSO and the AWP is observed after the 1990s when the AWP leads by 6–9 months. The AWP-induced La Niña-like SST anomalies in the tropical central Pacific further prompts a negative phase of the Pacific North American teleconnection, resulting in decreased precipitation over the southern United States; and vice versa. In addition to the AWP-induced central Pacific-type of ENSO events, the paper also shows the influences of the AWP on SSTs in the North Pacific and Indian Oceans. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183401
作者单位	State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China; Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China; First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China; Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao, China
推荐引用方式 GB/T 7714	Wang C.,Chen S.,Song Z.,et al. Impacts of the Atlantic warm pool on North American precipitation and global sea surface temperature in a coupled general circulation model[J],2021,56(2021-03-04).
APA	Wang C.,Chen S.,Song Z.,&Wang X..(2021).Impacts of the Atlantic warm pool on North American precipitation and global sea surface temperature in a coupled general circulation model.Climate Dynamics,56(2021-03-04).
MLA	Wang C.,et al."Impacts of the Atlantic warm pool on North American precipitation and global sea surface temperature in a coupled general circulation model".Climate Dynamics 56.2021-03-04(2021).