气候变化领域集成服务门户(CCPortal): Competing impacts of tropical Pacific and Atlantic on Southern Ocean inter-decadal variability

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DOI	10.1038/s41612-024-00662-w
	Competing impacts of tropical Pacific and Atlantic on Southern Ocean inter-decadal variability
	Yao, Shuai-Lei; Wu, Renguang; Luo, Jing-Jia; Zhou, Wen
发表日期	2024
ISSN	2397-3722
起始页码	7
结束页码	1
卷号	7 期号:1
英文摘要	The observed Southern Ocean sea surface temperature (SST) has experienced prominent inter-decadal variability nearly in phase with the Inter-decadal Pacific Oscillation (IPO), but less associated with the Atlantic Multidecadal Variability (AMV), challenging the prevailing view of Pacific-Atlantic synergistic effects. Yet, the mechanisms of distinct trans-hemispheric connections to the Southern Ocean remain indecisive. Here, by individually constraining the observed cold-polarity and warm-polarity IPO and AMV SSTs in a climate model, we show that the IPO is influential in initiating a basin-wide Southern Ocean response, with the AMV secondary. A tropical Pacific-wide cooling triggers a basin-scale Southern Ocean cold episode through a strong Rossby wave response to the north-to-south cross-equatorial weakened Hadley circulation. By contrast, due to the competing role of tropical Pacific cooling, an Atlantic warming partly cools the Southern Ocean via a weak Rossby wave response to the south-to-north cross-equatorial enhanced Hadley circulation. Conversely, tropical Pacific warming leads to a warm Southern Ocean episode. Our findings highlight that properly accounting for the tropical Pacific SST variability may provide a potential for skillful prediction of Southern Ocean climate change and more reliable estimates of climate sensitivity, currently overestimated by the misrepresented Southern Ocean warming.
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001227043000001
来源期刊	NPJ CLIMATE AND ATMOSPHERIC SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/295922
作者单位	Chinese Academy of Sciences; Institute of Atmospheric Physics, CAS; Zhejiang University; Nanjing University of Information Science & Technology; Fudan University; Fudan University; Fudan University
推荐引用方式 GB/T 7714	Yao, Shuai-Lei,Wu, Renguang,Luo, Jing-Jia,et al. Competing impacts of tropical Pacific and Atlantic on Southern Ocean inter-decadal variability[J],2024,7(1).
APA	Yao, Shuai-Lei,Wu, Renguang,Luo, Jing-Jia,&Zhou, Wen.(2024).Competing impacts of tropical Pacific and Atlantic on Southern Ocean inter-decadal variability.NPJ CLIMATE AND ATMOSPHERIC SCIENCE,7(1).
MLA	Yao, Shuai-Lei,et al."Competing impacts of tropical Pacific and Atlantic on Southern Ocean inter-decadal variability".NPJ CLIMATE AND ATMOSPHERIC SCIENCE 7.1(2024).