Diversity on the Interannual Variations of Spring Monthly Precipitation in Southern China and the Associated Tropical Sea Surface Temperature Anomalies  

作　　者：郭如月 潘蔚娟 柯敏玲 魏维 王子谦 GUO Ru-yue;PAN Wei-juan;KE Min-ling;WEI Wei;WANG Zi-qian(School of Atmospheric Sciences,Sun Yat-sen University and Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai,Guangdong 519082 China;Guangzhou Climate and Agrometeorology Center,Guangzhou Meteorological Service,Guangzhou 511400 China;Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies,Sun Yat-sen University,Zhuhai,Guangdong 519082 China)

机构地区：[1]School of Atmospheric Sciences,Sun Yat-sen University and Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai,Guangdong 519082 China [2]Guangzhou Climate and Agrometeorology Center,Guangzhou Meteorological Service,Guangzhou 511400 China [3]Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies,Sun Yat-sen University,Zhuhai,Guangdong 519082 China

出　　处：《Journal of Tropical Meteorology》2023年第3期337-346,共10页热带气象学报（英文版）

基　　金：National Key Research and Development Program of China(2019YFC1510400);National Natural Science Foundation of China(41975080);Guangdong Major Project of Basic and Applied Basic Research(2020B0301030004);Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies(2020B1212060025)。

摘　　要：There is a continuous and relatively stable rainy period every spring in southern China(SC).This spring precipitation process is a unique weather and climate phenomenon in East Asia.Previously,the variation characteristics and associated mechanisms of this precipitation process have been mostly discussed from the perspective of seasonal mean.Based on the observed and reanalysis datasets from 1982 to 2021,this study investigates the diversity of the interannual variations of monthly precipitation in spring in SC,and focuses on the potential influence of the tropical sea surface temperature(SST)anomalies.The results show that the interannual variations of monthly precipitation in spring in SC have significant differences,and the correlations between each two months are very weak.All the interannual variations of precipitation in three months are related to a similar western North Pacific anomalous anticyclone(WNPAC),and the southwesterlies at the western flank of WNPAC bring abundant water vapor for the precipitation in SC.However,the WNPAC is influenced by tropical SST anomalies in different regions each month.The interannual variation of precipitation in March in SC is mainly influenced by the signal of El Nino-Southern Oscillation,and the associated SST anomalies in the equatorial central-eastern Pacific regulate the WNPAC through the Pacific-East Asia(PEA)teleconnection.In contrast,the WNPAC associated with the interannual variation of precipitation in April can be affected by the SST anomalies in the northwestern equatorial Pacific through a thermally induced Rossby wave response.The interannual variation of precipitation in May is regulated by the SST anomalies around the western Maritime Continent,which stimulates the development of low-level anomalous anticyclones over the South China Sea and east of the Philippine Sea by driving anomalous meridional vertical circulation.

关 键 词：spring precipitation monthly diversity interannual variation southern China tropical sea surface temperature 

分 类 号：P426.614[天文地球—大气科学及气象学]