Characteristics and Mechanisms of Persistent Wet–Cold Events with Different Cold-air Paths in South China  

作　　者：Xiaojuan SUN Li CHEN Chuhan LU Panxing WANG 

机构地区：[1]Key Laboratory of Meteorological Disaster,Ministry of Education/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science and Technology,Nanjing 210044,China [2]School of Atmospheric Sciences,Nanjing University of Information Science and Technology,Nanjing 210044,China [3]Qianxinan Bouyei and Miao Autonomous Prefecture Meteorological Bureau of Guizhou Province,Xingyi 562400,China

出　　处：《Advances in Atmospheric Sciences》2024年第6期1171-1183,共13页大气科学进展（英文版）

基　　金：supported by the National Key Research and Development Program of China (Grant No. 2018YFC1505602);the National Natural Science Foundation of China (Grant No. 41705055);the Graduate Innovation Project of Jiangsu Province (Grant No. CXZZ11_0485);the Creative Teams of Jiangsu Qinglan Project;the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)

摘　　要：We investigate the characteristics and mechanisms of persistent wet–cold events(PWCEs)with different types of coldair paths.Results show that the cumulative single-station frequency of the PWCEs in the western part of South China is higher than that in the eastern part.The pattern of single-station frequency of the PWCEs are“Yangtze River(YR)uniform”and“east–west inverse”.The YR uniform pattern is the dominant mode,so we focus on this pattern.The cold-air paths for PWCEs of the YR uniform pattern are divided into three types—namely,the west,northwest and north types—among which the west type accounts for the largest proportion.The differences in atmospheric circulation of the PWCEs under the three types of paths are obvious.The thermal inversion layer in the lower troposphere is favorable for precipitation during the PWCEs.The positive water vapor budget for the three types of PWCEs mainly appears at the southern boundary.

关 键 词：persistent wet–cold events cold-air paths circulation characteristics water vapor 

分 类 号：P44[天文地球—大气科学及气象学]