In order to predict the heavy rainstorm process,a rare heavy rainstorm process occurred in Jingdezhen in the middle of August 2021 was analyzed by using conventional ground and upper air observation data,WebGis radar puzzle STI products,and ncep daily average reanalysis data.The results showed that the precipitation process has a long duration and high intensity,and the precipi-tation in the same period ranks first in the history of Jingdezhen.Strong precipitation occurs in favor-able environmental fields,and the convergence of wind speeds under warm forcing is the main cause of precipitation from November to December;From 13th to 14th,the cold air on the ground moved southward,and the baroclinicity of the atmosphere increased,triggering convective heavy rainfall,leading to the occurrence of continuous heavy rainstorm.The combination of STI products on the ra-dar puzzle shows that the new and old monomers move in the same direction,repeatedly passing through Jingdezhen and Leping urban areas,causing the train effect and eventually leading to heavy rainstorm.Compared with the same period of the year,the subtropical high is obviously south,and the cold air activity is strong and south,leading to a strong confrontation between cold and warm air,which is the main reason for the continuous heavy rainstorm in the middle of Jingdezhen.
关键词
连续性大暴雨/雷达组合STI/短时强降水/回波特征
Key words
continuous heavy rainstorm/radar combination STI/short term heavy precipitation/echo characteristics
维普
万方数据