DOI: 10.1007/s00382-012-1524-8
Scopus记录号: 2-s2.0-84881024100
论文题名: Origin of extreme summers in Europe: The Indo-Pacific connection
作者: Behera S. ; Ratnam J.V. ; Masumoto Y. ; Yamagata T.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 41, 期: 2017-03-04 起始页码: 663
结束页码: 676
语种: 英语
英文关键词: Europe dipole
; Extreme summers
; Indian Ocean dipole
; La Nina
英文摘要: Extreme summers of Europe are usually affected by blocking highs that shift between Western and Eastern Europe to cause regional variations in the surface temperature anomalies. Generally, the blocking high induces a regional temperature dipole with poles of warm and cold anomalies on two sides of Europe. The extreme summers of Western Europe, when the Eastern Europe is colder than normal, are usually associated with the teleconnections arising from positive Indian Ocean Dipole (IOD) events. In contrast, analogous warm events in Eastern Europe are usually associated with La Niña. The western Pacific conditions that prevail during the turnaround phase of El Niño to La Niña are found to be responsible for developing the extreme Eastern Europe events. The role of North Atlantic Oscillation (NAO) is not blatant for the Eastern Europe summers though it has a weaker influence on Western Europe summers for which IOD plays a dominant role: The seasonal July-August correlation for Western Europe temperature with IOD index is higher than that with the NAO index. The teleconnections for both types of extremes are associated with a Rossby wavetrain that travel around the globe to reach the Europe. This circumglobal teleconnection is largely determined by the location of the tropospheric heat source. For Western Europe warm events, major contributions come from the atmospheric convections/diabatic heating over northwest India and southern Pakistan. For the Eastern Europe events, the convections over northwest Pacific, south of Japan, are found to project the signals on to the mid-latitude wave-guide. These patterns of teleconnection are so robust that those can be seen on daily to seasonal time-scales of atmospheric anomalies. The wavetrains are found to set-in a couple of weeks prior to the development of blocking highs and extreme hot conditions over Europe. © 2012 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54849
Appears in Collections: 过去全球变化的重建
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作者单位: Research Institute for Global Change, JAMSTEC, Yokohama, Japan; Application Laboratory, JAMSTEC, Yokohama, Japan; 3173-25 Showa-machi, Kanazawa-ku, Yokohama, Kanagawa, 236-0001, Japan
Recommended Citation:
Behera S.,Ratnam J.V.,Masumoto Y.,et al. Origin of extreme summers in Europe: The Indo-Pacific connection[J]. Climate Dynamics,2013-01-01,41(2017-03-04)