DOI: 10.1007/s00382-015-2670-6
Scopus记录号: 2-s2.0-84959093469
论文题名: Regionality of record-breaking low temperature events in China and its associated circulation
作者: Kuang X. ; Zhang Y. ; Huang D. ; Huang Y.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期: 2017-05-06 起始页码: 1719
结束页码: 1731
语种: 英语
英文关键词: Arctic oscillation
; Jet stream
; Low temperature
; Record-breaking event
; Regionality
英文摘要: Extreme cold events frequently occur around the world in recent several years and arouse widespread concern. In this study, 17 record-breaking event processes (RBEPs) of low temperature during 1981–2012 are identified by using daily minimum temperature at 1897 meteorological stations in China. These RBEPs are classified into two types based on the occurring area at northern or southern China to compositely examine the associated circulations. Although the correspondence between Arctic oscillation (AO) and RBEPs is not linearly stable, there still exist relationship between them, i.e. under AO negative phase the RBEPs tend to occur at northern China, nor the southern part, where the RBEPs prefer to happen under AO positive phase. In the RBEPs occurring at southern China, the continent high pressure over Mongolia area is extremely intensified and the East Asian polar front jet stream is enhanced accompanied with strong synoptic-scale eddy kinetic energy transports. Correspondingly, the cold air masses break out and unobstructed southward intrude to low latitudes, causing severe cooling effect in southern China. In the RBEPs occurring at northern China, however, the extremely intensified high pressure over northern Siberian area, combining with the northward enhanced subtropical jet stream, lead to the cold air mass accumulation and blockage at mid-latitudes and therefore RBEPs of low temperature at this area. Further study implies that interdecadal change of the AO phase and differences of synoptic-scale eddy activity might synthetically attribute to the different regional preference of those RBEPs of low temperature that are mostly located at southern China in 1990s but concentrated in northern China in 2000s. © 2015, Springer-Verlag Berlin Heidelberg.
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/53785
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:
Kuang X.,Zhang Y.,Huang D.,et al. Regionality of record-breaking low temperature events in China and its associated circulation[J]. Climate Dynamics,2016-01-01,46(2017-05-06)