DOI: 10.1007/s00382-013-1871-0
Scopus记录号: 2-s2.0-84906100419
论文题名: Influence of the circumglobal wave-train on European summer precipitation
作者: Saeed S. ; Van Lipzig N. ; Müller W.A. ; Saeed F. ; Zanchettin D.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 43, 期: 2017-01-02 起始页码: 503
结束页码: 515
语种: 英语
英文关键词: Circumglobal wave train
; European summer precipitation
; Summer North Atlantic Oscillation
英文摘要: We investigate European summer (July-August) precipitation variability and its global teleconnections using the NCEP/NCAR reanalysis data (1950-2010) and a historical Coupled Model Intercomparison Project climate simulation (1901-2005) carried out using the ECHAM6/MPIOM climate model. A wavelike pattern is found in the upper tropospheric levels (200 hPa) similar to the summer circumglobal wave train (CGT) extending from the North Pacific to the Eurasian region. The positive phase of the CGT is associated with upper level anomalous low (high) pressure over western (eastern) Europe. It is further associated with a dipole-like precipitation pattern over Europe entailing significantly enhanced (reduced) precipitation over the western (eastern) region. The anomalous circulation features and associated summer precipitation pattern over Europe inverts for the negative CGT phase. Accordingly, the global teleconnection pattern of a precipitation index summarizing summer precipitation over Western Europe entails an upper level signature which consists of a CGT-like wave pattern extending from the North Pacific to Eurasia. The imprint of the CGT on European summer precipitation is distinct from that of the summer North Atlantic Oscillation, despite the two modes of variability bear strong similarities in their upper level atmospheric pattern over Western Europe. The analysis of simulated CGT features and of its climatic implications for the European region substantiates the existence of the CGT-European summer precipitation connection. The summer CGT in the mid-latitude therefore adds to the list of the modes of large-scale atmospheric variability significantly influencing European summer precipitation variability. © 2013 Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54355
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth and Environmental Sciences, KU Leuven, Leuven, Belgium; Max Planck Institute for Meteorology, Hamburg, Germany; Climate Service Center, Helmholtz-Zentrum Geesthacht, Hamburg, Germany
Recommended Citation:
Saeed S.,Van Lipzig N.,Müller W.A.,et al. Influence of the circumglobal wave-train on European summer precipitation[J]. Climate Dynamics,2014-01-01,43(2017-01-02)