物理学报Issue(22)：220634-220644,11.DOI:10.7498/aps.62.229201
中国冬季区域性极端低温事件分类及其与气候指数极端性的联系
The classification of winter regional extreme low temperature events in China and their corresponding relationship to climatic indices extreme anomaly
摘要
Abstract
We identify China regional low temperature extreme events (RELTEs) in winter during the periods from 1951 to 2010 using objec-tive identification technique for regional low temperature extreme events (OITRELTEs). The 559 RELTEs are identified and classified into 6 types, i.e. , nationwide style, east style, northeast-north China style, north-south China style, south style, and northwest-south China style, according to the spatial distribution of these events. The circulation backgrounds of different styles of low temperature events are also analyzed. In addition, taking the classical event that began from January 21st in 1971 for example, anomaly charac-teristics of sea surface temperature, geopotential height and winds vectors are investigated specifically. Based on these analyses, the corresponding relationships between different types of events and anomalies of climatic indices are further studied, and the relations between mainly influencing index and event are obtained for different types of events. On the whole, when the NINO3.4, the Pacific decadal oscillation, and the Arctic oscillation are small and the winter wind index is strong, the probability with which the RELTE happens is high;in the years in which the winter average values of the four indices reach 15%of extreme threshold, the percentages of occurrence of RELTE reach up to 80.0%, 77.8%, 60.0%and 62.5%, respectively. Therefore, certain signals can be offered for diagnosing and predicting the RELTE from the index anomalies.关键词
区域性极端低温事件/空间分类/气候指数/极端Key words
regional low temperature extreme events/spatial distribution/climatic index/extreme引用本文复制引用
王晓娟,沈柏竹,龚志强,封国林..中国冬季区域性极端低温事件分类及其与气候指数极端性的联系[J].物理学报,2013,(22):220634-220644,11.基金项目
国家自然科学基金(批准号:41305075)、国家重点基础研究计划(批准号:2012CB955203,2012CB955902)和公益性行业专项(批准号:GYHY201106016)资助的课题.*Project supported by the National Natural Science Foundation of China (Grant No.41305075), the National Basic Research Program of China (Grant Nos.2012CB955203,2012CB955902), and the Special Scientific Research Projects for Public Interest, China (Grant No. GYHY201106016) （批准号:41305075）
