Climatology of Tropical Cyclone Extreme Rainfall over China from 1960 to 2019  

作　　者：Ying LI Dajun ZHAO 

机构地区：[1]National Climate Centre,Beijing 100081,China [2]State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081,China

出　　处：《Advances in Atmospheric Sciences》2022年第2期320-332,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.2019YFC1510205);National Natural Science Foundation of China(Grant Nos.42175008,41775048 and 41930972);National Basic Research Program of China(Grant No.2015CB452804);the Open Grants of the State Key Laboratory of Severe Weather(Grant Nos.2021LASW-A12 and 2020LASWB06);Huafeng Meteorological Media Group Essential Research Project(Grant No.CY-J2020002)。

摘　　要：Tropical cyclone extreme rainfall(TCER)causes devastating floods and severe damage in China and it is therefore important to determine its long-term climatological distribution for both disaster prevention and operational forecasting.Based on the tropical cyclone(TC)best-track dataset and TC precipitation data from 1960 to 2019,the spatiotemporal distribution of TCER affecting China is analyzed.Results show that there were large regional differences in the threshold for TCER in China,decreasing from the southeastern coast to the northwest inland.TCER occurred infrequently in northern China but had a high intensity and was highly localized.The frequency and intensity of TCER showed slightly increasing trends over time and was most likely to occur in August(41.0%).Most of the TC precipitation processes with extreme rainfall lasted for four to six days,with TCER mainly occurring on the third to fourth days.TCER with wide areas showed a northwestward prevailing track and a westward prevailing track.Strong TCs are not always accompanied by extreme precipitation while some weak TCs can lead to very extreme rainfall.A total of 64.7%(35.3%)of the TCER samples occurred when the TC was centered over the land(sea).TCER≥250 mm was located within 3°of the center of the TC.When the center of the TC was located over the sea(land),the extreme rainfall over land was most likely to appear on its northwestern(northeastern)side with a dispersed(concentrated)distribution.TCER has unique climatic characteristics relative to the TC precipitation.

关 键 词：tropical cyclones extreme rainfall THRESHOLD track characteristics intensity characteristics 

分 类 号：P426.6[天文地球—大气科学及气象学] P444