DOI: 10.1007/s00382-017-3905-5
Scopus记录号: 2-s2.0-85029503959
论文题名: Possible mechanisms for four regimes associated with cold events over East Asia
作者: Yang Z. ; Huang W. ; Wang B. ; Chen R. ; Wright J.S. ; Ma W.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 51, 期: 2018-01-02 起始页码: 35
结束页码: 56
语种: 英语
英文关键词: Clustering
; Cold events
; Earliest precursor
; Lead time
; North Atlantic oscillation
Scopus关键词: advection
; anticyclone
; cluster analysis
; cooling
; El Nino-Southern Oscillation
; North Atlantic Oscillation
; teleconnection
; winter
; Far East
英文摘要: Circulation patterns associated with cold events over East Asia during the winter months of 1948–2014 are classified into four regimes by applying a k-means clustering method based on the area-weighted pattern correlation. The earliest precursor signals for two regimes are anticyclonic anomalies, which evolve into Ural and central Siberian blocking-like circulation patterns. The earliest precursor signals for the other two regimes are cyclonic anomalies, both of which evolve to amplify the East Asian trough (EAT). Both the blocking-like circulation patterns and amplified EAT favor the initialization of cold events. On average, the blocking-related regimes tend to last longer. The lead time of the earliest precursor signal for the central Siberian blocking-related regime is only 4 days, while those for the other regimes range from 16 to 18 days. The North Atlantic Oscillation plays essential roles both in triggering the precursor for the Ural blocking-related regime and in amplifying the precursors for all regimes. All regimes preferentially occur during the positive phase of the Eurasian teleconnection pattern and the negative phase of the El Niño–Southern Oscillation. For three regimes, surface cooling is primarily due to reduced downward infrared radiation and enhanced cold advection. For the remaining regime, which is associated with the southernmost cooling center, sensible and latent heat release and horizontal cold advection dominate the East Asian cooling. © 2017, Springer-Verlag GmbH Germany. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109228
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Ministry of Education Key Laboratory for Earth System Modeling and Department of Earth System Science (DESS), Tsinghua University, Beijing, 100084, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences, Beijing, 100029, China
Recommended Citation:
Yang Z.,Huang W.,Wang B.,et al. Possible mechanisms for four regimes associated with cold events over East Asia[J]. Climate Dynamics,2018-01-01,51(2018-01-02)