DOI: 10.1007/s00382-014-2241-2
Scopus记录号: 2-s2.0-84939885108
论文题名: Potential influence of the November–December Southern Hemisphere annular mode on the East Asian winter precipitation: a new mechanism
作者: Wu Z. ; Dou J. ; Lin H.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 44, 期: 2017-05-06 起始页码: 1215
结束页码: 1226
语种: 英语
英文关键词: Mechanism
; Northern Hemisphere climate
; Southern Hemisphere annular mode
英文摘要: As the leading mode of the global atmospheric mass inter-annual variability, the Southern Hemisphere annular mode (SAM) may exert potential influences to the Northern Hemisphere (NH) climate, but the related physical mechanism is not yet clear. In this study, it is found that the November–December (ND) SAM exhibits a significant inverse relationship with the winter precipitation over East Asia, particularly southern China. Observational and numerical evidences show that anomalous ND SAM is usually associated with a South Atlantic–Pacific dipole sea surface temperature anomaly (SSTA) which persists into ensuring winter. The dipole SSTA can modulate the variability of the Inter-tropical Convergence Zone (ITCZ) in Pacific. Subsequently, a distinguished atmospheric tele-connection pattern is induced and prevails over the NH mid-latitude region as a response to the anomalous ITCZ. Large areas of high pressure anomalies are triggered at upper troposphere over East Asia and centered over southern China, which favors less precipitation over East Asia, particularly southern China, and vice versa. Through such a physical mechanism, the notable influence of the ND SAM can sustain through the following season and impact on the NH winter climate. © 2014, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54190
Appears in Collections: 过去全球变化的重建
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作者单位: Earth System Modeling Center, Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China; Atmospheric Numerical Weather Prediction Research Section, Environment Canada, Dorval, QC, Canada
Recommended Citation:
Wu Z.,Dou J.,Lin H.. Potential influence of the November–December Southern Hemisphere annular mode on the East Asian winter precipitation: a new mechanism[J]. Climate Dynamics,2015-01-01,44(2017-05-06)