DOI: 10.1175/JCLI-D-17-0413.1
Scopus记录号: 2-s2.0-85050243688
论文题名: Teleconnection between summer NAO and East China rainfall variations: A bridge effect of the Tibetan Plateau
作者: Wang Z. ; Yang S. ; Lau N.-C. ; Duan A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 16 起始页码: 6433
结束页码: 6444
语种: 英语
英文关键词: Climate variability
; Interannual variability
Scopus关键词: Atmospheric pressure
; Climate change
; Mechanical waves
; Storms
; Troposphere
; Climate variability
; Downstream region
; Interannual time scale
; Interannual variability
; Lower troposphere
; North Atlantic oscillations
; Rainfall variability
; Rainfall variation
; Rain
; annual variation
; atmospheric forcing
; climate variation
; North Atlantic Oscillation
; rainfall
; spring (season)
; summer
; teleconnection
; timescale
; troposphere
; winter
; China
; Eurasia
; Qinghai-Xizang Plateau
英文摘要: Although the impact of the North Atlantic Oscillation (NAO), especially the antecedent NAO in winter and spring, on East Asian summer climate has been studied extensively, the possible connection from the summer NAO (SNAO) and then the Tibetan Plateau (TP) to East China summer rainfall remains unclear. This study reveals that on interannual time scales the SNAO is significantly correlated with the variations of East China summer rainfall and the thermal forcing of the TP provides an intermediate bridge effect in this Eurasian teleconnection. The SNAO primarily regulates the rainfall variability over the TP through large-scale wave trains and the TP rainfall anomalies in turn lead to a change in local diabatic heating, which excites Rossby waves to the downstream regions. To the northeast of the TP, an anomalous barotropic cyclone is formed in the nearly entire troposphere, generating low-level northerly flow anomalies over northern China. Meanwhile, the TP heating also induces low-level southerly flow anomalies over southern China. The anomalous northerly and southerly winds converge in the lower troposphere, enhancing the summer rainfall over central East China. Compared to the SNAO, the TP thermal forcing exerts a more direct impact on the variations of East China summer rainfall in the Eurasian teleconnection discussed. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111452
Appears in Collections: 气候减缓与适应
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作者单位: School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, China; Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Guangzhou, China; Institute of Environment, Energy and Sustainability, Chinese University of Hong Kong, Hong Kong; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Wang Z.,Yang S.,Lau N.-C.,et al. Teleconnection between summer NAO and East China rainfall variations: A bridge effect of the Tibetan Plateau[J]. Journal of Climate,2018-01-01,31(16)