气候变化领域集成服务门户(CCPortal): Multidecadal Variations in the Tropical Western Pacific Driven by Externally-Forced AMV-Like Changes

CCPortal

	Multidecadal Variations in the Tropical Western Pacific Driven by Externally-Forced AMV-Like Changes
	Qin, Minhua; Zhang, Renhe; Dai, Aiguo; Hua, Wenjian
发表日期	2024
ISSN	0094-8276
EISSN	1944-8007
起始页码	51
结束页码	4
卷号	51 期号:4
英文摘要	Multidecadal sea surface temperature (SST) variations in the tropical western Pacific (TWP) have been attributed to nonlinear external forcing and remote influences from the Atlantic Multidecadal Variability (AMV). However, the AMV resulted from both internal variability (IV) and external forcing. Thus, the origins of the TWP SST variations are not well understood. By analyzing observations and model simulations, we show that more than half of the decadal to multidecadal SST variations in TWP during 1920-2020 resulted from external forcing with the forced component correlated with AMV, while the internal component is unrelated to AMV. Furthermore, about 43%-49% of the forced AMV-like SST variations in TWP result from remote influences of the forced AMV in the Atlantic via atmospheric teleconnection over the North Pacific, with the rest from other remote or local processes. Sea surface temperature (SST) variations in the North Atlantic Ocean and Pacific Ocean are linked on multidecadal time scales. Previous studies have indicated that the Atlantic multidecadal SST variations (referred to as Atlantic multidecadal variability, AMV) not only influence the decadal SST variations in the tropical central-eastern Pacific (referred to as Interdecadal Pacific Oscillation), but also modulate the multidecadal SST variations in the tropical western Pacific (TWP). Since the TWP SST variations can result from both local external forcing and remote influences from AMV, the exact origins of TWP's multidecadal variability remains unclear. Here we analyze observations and model experiments to show that similar to 56% of the decadal to multidecadal SST variations in TWP during 1920-2020 resulted from nonlinear external forcing, with the rest from internal variability (IV), and the forced SST variations in TWP are correlated with AMV while the IV-induced variations are unrelated to AMV. Both the local external forcing and remote influences from the forced AMV in the Atlantic contribute to the forced multidecadal SST variations in TWP. Atlantic Multidecadal Variability (AMV) is mainly correlated with the forced decadal sea surface temperature (SST) variations in tropical western Pacific (TWP) during 1920-2020 About 43%-49% of forced TWP SST variations, which account for more than half of the total decadal variations, come from the Atlantic Ocean The connections between the externally-forced AMV and TWP SST are through the extratropical pathway in the North Pacific
英文关键词	Atlantic multidecadal variability; internal variability; external forcing; tropical western Pacific
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001177318400015
来源期刊	GEOPHYSICAL RESEARCH LETTERS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305832
作者单位	Fudan University; Fudan University; Nanjing University of Information Science & Technology; Fudan University; State University of New York (SUNY) System; State University of New York (SUNY) Albany
推荐引用方式 GB/T 7714	Qin, Minhua,Zhang, Renhe,Dai, Aiguo,et al. Multidecadal Variations in the Tropical Western Pacific Driven by Externally-Forced AMV-Like Changes[J],2024,51(4).
APA	Qin, Minhua,Zhang, Renhe,Dai, Aiguo,&Hua, Wenjian.(2024).Multidecadal Variations in the Tropical Western Pacific Driven by Externally-Forced AMV-Like Changes.GEOPHYSICAL RESEARCH LETTERS,51(4).
MLA	Qin, Minhua,et al."Multidecadal Variations in the Tropical Western Pacific Driven by Externally-Forced AMV-Like Changes".GEOPHYSICAL RESEARCH LETTERS 51.4(2024).