气候变化领域集成服务门户(CCPortal): Atlantic-Pacific links in observed multidecadal SST variability: Is the atlantic multidecadal oscillation's phase reversal orchestrated by the pacific decadal oscillation?

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DOI	10.2196/10.1175/JCLI-D-19-0880.1
	Atlantic-Pacific links in observed multidecadal SST variability: Is the atlantic multidecadal oscillation's phase reversal orchestrated by the pacific decadal oscillation?
	Nigam S.; Sengupta A.; Ruiz-Barradas A.
发表日期	2020
ISSN	0894-8755
起始页码	5479
结束页码	5505
卷号	33 期号:3
英文摘要	The Atlantic and Pacific basin are found linked in the context of multidecadal SST variability from analyses of 118 years of observational data. Recurrent spatiotemporal variability, including multidecadal modes, was identified using the extended-EOF technique in a longitudinally global domain, allowing unfettered expression of interbasin interactions. The physicality of the obtained decadal modes was assessed using fishery records and analog counts. A three-mode structure with bi-directional interbasin links frames the new perspective on the cycling of multidecadal SST variability. The three modes are the Atlantic multidecadal oscillation (AMO), low-frequency North Atlantic Oscillation (LF-NAO), and North Pacific decadal variability [PDV-NP; resembling negative (-ve) PDO]. The two previously documented links AMO/PDV-NP (with ∼12.5-yr lead) and LFNAO/AMO (with 16-yr lead) are corroborated, while a third one, PDV-NP/(2LF-NAO) with ∼6.5-yr lead, is uncovered. The interaction triad closes the loop on the cycling of multidecadal SST variability, generating AMO's phase reversal in ∼35 years, consistent with its widely noted ∼70-yr time scale. The two previously noted links-one intrabasin and one interbasin-were unsuccessful in this regard. Other findings include the deeper subsurface extensions of Atlantic multidecadal SST variability, and the hitherto unrecognized similarity of Pan-Pacific decadal variability and North Pacific Gyre Oscillation. Instrumental records, albeit short in the context of multidecadal variability, must continue to be mined for insights into the functioning of the climate system as its model representations while improving, remain inadequate. © 2020 American Meteorological Society.
英文关键词	Atmospheric pressure; Climate models; Atlantic multidecadal oscillations; Model representation; Multidecadal variability; North Atlantic oscillations; Observational data; Pacific decadal oscillation; Pacific decadal variabilities; Spatiotemporal variability; Lead compounds; air-sea interaction; Atlantic Multidecadal Oscillation; climatology; decadal variation; Pacific Decadal Oscillation; sea surface temperature; spatiotemporal analysis; temperature gradient; timescale; Atlantic Ocean; Pacific Ocean
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171242
作者单位	Department of Atmospheric and Oceanic Science, University of Maryland College Park, College Park, MD, United States; Earth System Science Interdisciplinary Center (ESSIC), University of Maryland College Park, College Park, MD, United States; Indian Institute of Technology (IIT), Mandi, Himachal Pradesh, India; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Nigam S.,Sengupta A.,Ruiz-Barradas A.. Atlantic-Pacific links in observed multidecadal SST variability: Is the atlantic multidecadal oscillation's phase reversal orchestrated by the pacific decadal oscillation?[J],2020,33(3).
APA	Nigam S.,Sengupta A.,&Ruiz-Barradas A..(2020).Atlantic-Pacific links in observed multidecadal SST variability: Is the atlantic multidecadal oscillation's phase reversal orchestrated by the pacific decadal oscillation?.Journal of Climate,33(3).
MLA	Nigam S.,et al."Atlantic-Pacific links in observed multidecadal SST variability: Is the atlantic multidecadal oscillation's phase reversal orchestrated by the pacific decadal oscillation?".Journal of Climate 33.3(2020).