Extensive Cold-Precipitation-Freezing Events in Southern China and Their Circulation Characteristics

作     者：Jing-Bei PENG Cholaw BUEH Zuo-Wei XIE Jing-Bei PENG;Cholaw BUEH;Zuo-Wei XIE

作者机构：Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China 

出 版 物：《Advances in Atmospheric Sciences》 (大气科学进展（英文版）)

年 卷 期：2021年第38卷第1期

页      面：81-97页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 0816[工学-测绘科学与技术] 0825[工学-航空宇航科学与技术] 

基　　金：This research was funded by the National Natural Science Foundation of China(Grant Nos.41975072 and 41675086) the National Science and Technology Support Program of China(Grant No.2015BAC03B03) 

主　　题：extensive cold-precipitation-freezing event southern China large-scale tilted ridge and trough trough over the Bay of Bengal western Pacific subtropical high 

摘      要：Concurrence of low temperature,precipitation and freezing weather in an extensive area would cause devastating impacts on local economy and *** call such a combination of concurrent disastrous weather“extensive coldprecipitation-freezingevents(ECPFEs).In this study,the ECPFEs in southern China(15°−35°N,102°−123°E)are objectively defined by using daily surface observational data for the period 1951−*** ECPFE in southern China is defined if the low temperature area,precipitation area and freezing area concurrently exceed their respective thresholds for at least three consecutive *** identified ECPFEs are shown to be reasonable and reliable,compared with those in previous *** circulation anomalies in ECPFEs are characterized by a large-scale tilted ridge and trough pairing over mid-and high-latitude Eurasia,and the intensified subtropical westerlies along the southern foot of the Tibetan Plateau and the anomalous anticyclonic circulation over the subtropical western *** analysis reveals that the stable cold air from the north and the warm and moist air from the south converge,facilitating a favorable environment for the concurrence of extensive low-temperature,precipitation and freezing weather.