DOI: 10.1175/JCLI-D-14-00254.1
Scopus记录号: 2-s2.0-84919725372
论文题名: Global warming-induced changes in El Niño teleconnections over the North Pacific and North America
作者: Zhou Z.-Q. ; Xie S.-P. ; Zheng X.-T. ; Liu Q. ; Wang H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 24 起始页码: 9050
结束页码: 9064
语种: 英语
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Climate change
; Computer simulation
; Global warming
; Greenhouse gases
; Nickel
; Oceanography
; Rain
; Surface waters
; Atmospheric general circulation models
; Atmospheric teleconnections
; ENSO
; North American
; Precipitation anomalies
; Sea surface temperature (SST)
; Teleconnections
; Tropical convective anomalies
; Climate models
; climate change
; climate effect
; El Nino-Southern Oscillation
; global warming
; greenhouse gas
; sea surface temperature
; teleconnection
; North America
; Pacific Ocean
; Pacific Ocean (Equatorial)
; Pacific Ocean (North)
英文摘要: El Niño-Southern Oscillation (ENSO) induces climate anomalies around the globe. Atmospheric general circulation model simulations are used to investigate how ENSO-induced teleconnection patterns during boreal winter might change in response to global warming in the Pacific-North American sector. As models disagree on changes in the amplitude and spatial pattern of ENSO in response to global warming, for simplicity the same sea surface temperature (SST) pattern of ENSO is prescribed before and after the climate warming. In a warmer climate, precipitation anomalies intensify and move eastward over the equatorial Pacific during El Niño because the enhanced mean SST warming reduces the barrier to deep convection in the eastern basin. Associated with the eastward shift of tropical convective anomalies, the ENSO-forced Pacific-North American (PNA) teleconnection pattern moves eastward and intensifies under the climate warming. By contrast, the PNA mode of atmospheric internal variability remains largely unchanged in pattern, suggesting the importance of tropical convection in shifting atmospheric teleconnections. As the ENSO-induced PNA pattern shifts eastward, rainfall anomalies are expected to intensify on the west coast of North America, and the El Niño-induced surface warming to expand eastward and occupy all of northern North America. The spatial pattern of the mean SST warming affects changes in ENSO teleconnections. The teleconnection changes are larger with patterned mean warming than in an idealized case where the spatially uniform warming is prescribed in the mean state. The results herein suggest that the eastward-shifted PNA pattern is a robust change to be expected in the future, independent of the uncertainty in changes of ENSO itself. © 2014 American Meteorological Society. 资助项目: NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51284
Appears in Collections: 气候变化事实与影响
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作者单位: Physical Oceanography Lab./Qingdao Collaborative Innovation Center of Marine Science and Technology, Key Laboratory of Ocean-Atmosphere Interaction and Climate in Universities of Shandong, Ocean University of China, Qingdao, China; Scripps Institution of Oceanography, University of California at San Diego, La Jolla, CA, United States
Recommended Citation:
Zhou Z.-Q.,Xie S.-P.,Zheng X.-T.,et al. Global warming-induced changes in El Niño teleconnections over the North Pacific and North America[J]. Journal of Climate,2014-01-01,27(24)