Abstract:Based on the real-time and historical meteorological observation data of the National Climate Center, the climatic characteristics of China's flood season in 2020(March 28th to September 8th) were comprehensively analyzed. The results show that during the flood season of 2020, China's climatic characteristics were generally rainy and warm, waterlogging was more serious than drought, and the climate extreme events occur frequently. Firstly, there were periodic rainstorms and floods in many places in China, with wide coverage and large accumulated rainfall. Secondly, there had been a regional high temperature weather process with the second longest duration since 1961 in the south. Thirdly, the typhoon was generally inactive, but the stage was outstanding. In July, there was no numbered typhoon and landing typhoon, which was the first time since 1949. Fourthly, the meteorological drought was generally light. The analysis also shows that the weak El Nino event in the equatorial Middle East Pacific from autumn of 2019 to spring of 2020 and the persistently high SST in the North Indian Ocean leaded to the persistently strong subtropical high in the western Pacific Ocean were the important reasons for the climate anomaly in flood season in China.
李威, 艾婉秀, 曾红玲, 崔童. 2020年汛期我国主要天气气候特征及成因分析[J]. 中国防汛抗旱, 2021, 31(1): 1-5,63.
LI Wei, AI Wanxiu, ZENG Hongling, CUI Tong. Major weather and climate characteristics of China during flood season in 2020. journal1, 2021, 31(1): 1-5,63.