Relationship between Lightning Distribution and Radar Echo Intensity in Heavy Rainstorm Weather in Jiangxi Province
The distribution of lightning during heavy rainstorm is closely related to the intensity of ra-dar echo,and the intensity change of radar echo can be indirectly judged according to the intensity of lightning,which provides clues for analyzing the evolution trend of echo system.Using automatic station data,conventional weather map,lightning data,radar mosaic and other data,using lightning knowledge,radar meteorology principles and analysis methods,this paper analyzes the rainstorm re-ality,weather system,lightning distribution,radar echo characteristics,etc.of the four heavy rain-storm processes in Jiangxi in 2022,and summarizes the relationship between lightning and echo.The results show that there are four large-scale heavy rainstorm weather processes in the flood season of 2022 in Jiangxi,which are mainly distributed in central and northern Jiangxi.The weather sys-tems such as 500 hPa low trough,850 hPa shear line,100 hPa diverging area,medium intensity CAPE,and low level jet stream and ultra-low level jet stream were the main factors causing heavy rainstorm in Jiangxi.There is a corresponding relationship between the strong echo area of≥45 dBZ and the areas with dense lightning and heavy precipitation.Dense strong lightning often leads the appearance of strong echoes and heavy precipitation.The research results provide an analytical basis for lightning distribution and radar monitoring,early warning and forecasting during heavy rainstorm in Jiangxi province.
heavy rainstormweather systemlightning distributiondBZ
国家科技期刊平台
NSTL
万方数据
