globalchange  > 气候变化事实与影响
Scopus记录号: 2-s2.0-85042388253
论文题名:
Impact of ENSO longitudinal position on teleconnections to the NAO
作者: Zhang W.; Wang Z.; Stuecker M.F.; Turner A.G.; Jin F.-F.; Geng X.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2019
卷: 52, 期:2019-01-02
起始页码: 257
结束页码: 274
语种: 英语
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.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122481
Appears in Collections:气候变化事实与影响

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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

Recommended Citation:
Zhang W.,Wang Z.,Stuecker M.F.,et al. Impact of ENSO longitudinal position on teleconnections to the NAO[J]. Climate Dynamics,2019-01-01,52(2019-01-02)
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