DOI: 10.1007/s00382-014-2171-z
Scopus记录号: 2-s2.0-84939888097
论文题名: Evolution of Eurasian teleconnection pattern and its relationship to climate anomalies in China
作者: Wang N. ; Zhang Y.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 44, 期: 2017-03-04 起始页码: 1017
结束页码: 1028
语种: 英语
英文关键词: Climate anomalies in China
; Eurasian teleconnection pattern
; Spatial structure
; Temporal evolution
英文摘要: The Eurasian teleconnection pattern (EU) is a major mode of low-frequency variability in the Northern Hemisphere winter, with notable impacts on the temperature and precipitation anomalies in Eurasia region. To investigate the structure, life cycle and dynamical mechanisms of EU pattern, diagnostic analyses are conducted to clarify EU pattern evolution, with an emphasis on EU development and decay. In the developing stage, a geopotential height anomaly over North Atlantic emerges 6 days before EU peak phase and other three geopotential height anomalies appear one by one in the following days. During this period, all geopotential height anomalies experience considerable growth and the four-center structure of EU pattern forms 2 days before peak phase. The obvious wave train structure appears at 300 hPa. The EU pattern growth is driven by both relative vorticity advection and transient eddy fluxes. After the peak phase, the geopotential height anomaly over North Atlantic becomes weak as it decays earlier than other anomaly centers, which leads to the classic three-center structure of EU teleconnection pattern. The complete life cycle of EU pattern experience considerable growth and decay within 10 days. During the decaying stage, the horizontal divergence and the transient eddy fluxes play important roles. Additionally, the relationship of EU pattern to winter climate anomalies in China is also analyzed focusing on the decaying stage. The impact of EU pattern on temperature and precipitation in China are significant in 2–4 days after EU peak phase and the distribution of temperature and precipitation anomaly has obvious regional differences. © 2014, The Author(s). 资助项目: NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54447
Appears in Collections: 过去全球变化的重建
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作者单位: School of Atmospheric Sciences, Nanjing University, Nanjing, China
Recommended Citation:
Wang N.,Zhang Y.. Evolution of Eurasian teleconnection pattern and its relationship to climate anomalies in China[J]. Climate Dynamics,2014-01-01,44(2017-03-04)