Abstract：In order to better study the extreme nature of short-term heavy precipitation.The article uses data on the frequency and magnitude of short-term heavy precipitation (≥30 mm/h) in Jiangxi from 2012 to 2021,and uses the percentile algorithm to analyze the extreme threshold of short-term heavy precipitation in Jiangxi.The results showed that the extreme threshold for short-term heavy precipitation in Jiangxi is ≥80 mm/h ±2％ for national stations and ≥90 mm/h ±2％ for regional stations.The radar echo characteristics of extreme short-term heavy precipitation in Jiangxi Province are characterized by the presence of multiple flocculent echo bands with different directions,with a combined reflectivity of 50 dBZ to 55 dBZ (up to 60 dBZ in super strong cases).The area of strong echoes with a reflectivity of ≥45 dBZ is ≥300 km2,and the slow or minimal movement of strong echoes maintains the heavy precipitation,resulting "ultra short time heavy precipitation" (≥10 mm/10 min).The slow movement of elliptical strong echoes with a reflectivity of 55 dBZ is also the echo system that causes extreme heavy precipitation.The research results have determined the extreme threshold for short-term heavy precipitation,providing an analytical basis for carrying out extreme heavy precipitation in Jiangxi.
马中元, 陈鲍发, 周晓香, 计桂平. 江西短时强降水极端阈值与回波特征分析[J]. 气象水文海洋仪器, 2024, 41(6): 1-4.
Ma Zhongyuan, Chen Baofa, Zhou Xiaoxiang, Ji Guiping. Analysis of extreme threshold and echo characteristics of shortterm heavy precipitation in Jiangxi Province. Meteorological Hydrological and Marine Instrument, 2024, 41(6): 1-4.
2024, Vol. 41 
