DOI: 10.1175/JCLI-D-17-0525.1
Scopus ID: 2-s2.0-85047062149
Title: Enhanced linkage between eurasian winter and spring dominant modes of atmospheric interannual variability since the early 1990s
Author: Chen S. ; Wu R. ; Chen W. ; Yao S.
Source Publication: Journal of Climate
ISSN: 8948755
Publishing Year: 2018
Volume: 31, Issue: 9 pages begin: 3575
pages end: 3595
Language: 英语
Keyword: Atmosphere-ocean interaction
; Atmospheric circulation
; ENSO
; Teleconnections
Scopus Keyword: Atmospheric thermodynamics
; Climate change
; Surface waters
; Air-sea interaction process
; Atmosphere-ocean interactions
; Atmospheric circulation
; Atmospheric circulation anomaly
; ENSO
; Geopotential height anomalies
; Sea surface temperature anomalies
; Teleconnections
; Oceanography
English Abstract: The present study reveals a marked enhancement in the relationship between Eurasian winter and spring atmospheric interannual variability since the early 1990s. Specifically, the dominant mode of winter Eurasian 500-hPa geopotential height anomalies, with same-sign anomalies over southern Europe and East Asia and opposite-sign anomalies over north-central Eurasia, is largely maintained to the following spring after the early 1990s, but not before the early 1990s. The maintenance of the dominant atmospheric circulation anomaly pattern after the early 1990s is associated with a triple sea surface temperature (SST) anomaly pattern in the North Atlantic that is sustained from winter to the subsequent spring. This triple SST anomaly pattern triggers an atmospheric wave train over the North Atlantic through Eurasia during winter through spring. Atmospheric model experiments verify the role of the triple SST anomaly in maintaining the Eurasian atmospheric circulation anomalies. By contrast, before the early 1990s, marked SST anomalies related to the winter dominant mode only occur in the tropical North Atlantic during winter and they disappear during the following spring. The triple SST anomaly pattern after the early 1990s forms in response to a meridional atmospheric dipole over the North Atlantic induced by a La Niña-like cooling over tropical Pacific, and its maintenance into the following spring may be via a positive air-sea interaction process over the North Atlantic. Results of this analysis suggest a potential source for the seasonal prediction of the Eurasian spring climate. © 2018 American Meteorological Society. Citation statistics:
Document Type: 期刊论文
Identifier: http://119.78.100.158/handle/2HF3EXSE/111547
Appears in Collections: 气候减缓与适应
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Affiliation: Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; State Key Lab. of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy Of Sciences, Beijing, China
Recommended Citation:
Chen S.,Wu R.,Chen W.,et al. Enhanced linkage between eurasian winter and spring dominant modes of atmospheric interannual variability since the early 1990s[J]. Journal of Climate,2018-01-01,31(9)