气候变化领域集成服务门户(CCPortal): Impact of ENSO longitudinal position on teleconnections to the NAO

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DOI	10.1007/s00382-018-4135-1
	Impact of ENSO longitudinal position on teleconnections to the NAO
	Zhang W.; Wang Z.; Stuecker M.F.; Turner A.G.; Jin F.-F.; Geng X.
发表日期	2019
ISSN	0930-7575
起始页码	257
结束页码	274
卷号	52 期号:2020-01-02
英文摘要	While significant improvements have been made in understanding how the El Niño–Southern Oscillation (ENSO) impacts both North American and Asian climate, its relationship with the North Atlantic Oscillation (NAO) remains less clear. Observations indicate that ENSO exhibits a highly complex relationship with the NAO-associated atmospheric circulation. One critical contribution to this ambiguous ENSO/NAO relationship originates from ENSO’s diversity in its spatial structure. In general, both eastern (EP) and central Pacific (CP) El Niño events tend to be accompanied by a negative NAO-like atmospheric response. However, for two different types of La Niña the NAO response is almost opposite. Thus, the NAO responses for the CP ENSO are mostly linear, while nonlinear NAO responses dominate for the EP ENSO. These contrasting extra-tropical atmospheric responses are mainly attributed to nonlinear air-sea interactions in the tropical eastern Pacific. The local atmospheric response to the CP ENSO sea surface temperature (SST) anomalies is highly linear since the air-sea action center is located within the Pacific warm pool, characterized by relatively high climatological SSTs. In contrast, the EP ENSO SST anomalies are located in an area of relatively low climatological SSTs in the eastern equatorial Pacific. Here only sufficiently high positive SST anomalies during EP El Niño events are able to overcome the SST threshold for deep convection, while hardly any anomalous convection is associated with EP La Niña SSTs that are below this threshold. This ENSO/NAO relationship has important implications for NAO seasonal prediction and places a higher requirement on models in reproducing the full diversity of ENSO. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
语种	英语
scopus关键词	air-sea interaction; atmospheric circulation; El Nino-Southern Oscillation; North Atlantic Oscillation; sea surface temperature; teleconnection; temperature anomaly; Pacific Ocean; Pacific Ocean (Central); Pacific Ocean (East)
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/146638
作者单位	CIC-FEMD/ILCEC, Key Laboratory of Meteorological Disaster of Ministry of Education, College of Atmospheric Sciences, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Cooperative Programs for the Advancement of Earth System Sciences (CPAESS), University Corporation for Atmospheric Research (UCAR), Boulder, CO, United States; NCAS-Climate, University of Reading, Reading, RG6 6BB, United Kingdom; Department of Meteorology, University of Reading, Reading, RG6 6BB, United Kingdom; Department of Atmospheric Sciences, SOEST, University of Hawai’i at Manoa, Honolulu, HI 96822, United States
推荐引用方式 GB/T 7714	Zhang W.,Wang Z.,Stuecker M.F.,et al. Impact of ENSO longitudinal position on teleconnections to the NAO[J],2019,52(2020-01-02).
APA	Zhang W.,Wang Z.,Stuecker M.F.,Turner A.G.,Jin F.-F.,&Geng X..(2019).Impact of ENSO longitudinal position on teleconnections to the NAO.Climate Dynamics,52(2020-01-02).
MLA	Zhang W.,et al."Impact of ENSO longitudinal position on teleconnections to the NAO".Climate Dynamics 52.2020-01-02(2019).