译 名：
Cause Analysis of Extreme Rainstorm Weather Process in Shangrao in June 2022
关键词：
South China Sea monsoon%Diurnal variation%Extreme heavy rainfall%Low centroid tropical precipitation
摘 要：
Based on the conventional meteorological observation data,ERA5 0.25 °×0.25 ° reanalysis data and radar observation data,the synoptic dynamic diagnosis and cause analysis of an extreme rainstorm process in Shangrao City in June 2022 are carried out.The results show that:(1)the persistent rainstorm process was the result of the combined action of the South China Sea monsoon outbreak,the westerly belt system moving eastward,the weak cold air moving southward behind the northeast cold vortex,and the stability of the subtropical high.(2)The upper level of the troposphere in northeastern Jiangxi was located in the entrance area of high-altitude jet streams and the convergence area of lower levels.The upward and downward suction enhances the vertical upward movement of warm and humid airflow.(3)The long-term confrontation between the cold and warm air mass in the northeast of Jiangxi was the reason why the rainstorm has been maintained in the northeast of Jiangxi for a long time,which was far higher than the climate state of atmospheric precipitable water(nearly 5 years),providing exceptionally strong water vapor conditions for extreme heavy rainfall.
