池州市雷暴活动特征分析

Characteristics Analysis of Thunderstorms Activity in Chizhou City

该文基于池州市4个气象站多年雷暴日观测资料、安徽省闪电定位系统ADTD探测的云地闪电资料资料,应用数据统计、趋势分析等方法,从区域分布、年际变化、月际变化及日变化等方面对池州市雷暴活动进行了详细的分析,为池州地区防雷减灾工作提供技术依据。结果表明:池州市属于雷暴多发区,年平均雷暴日为41.2d,山区明显偏多;每年的3—9月是雷暴活跃期,7月最多,12月最少;池州市雷暴活动日变化呈现单峰特点,高峰出现在15:00—19:00;近50a池州市雷暴日数呈现出在波动中减少的趋势,近年来池州市处于雷暴活动的非活跃期。

Based on the daily meteorological data in thunderstorm days from four meteorological stations in Chizhou,and cloud-to-ground lightning data probed by ADTD lightning location monitoring system in Anhui Province,the thunderstorm activity characteristics in Chizhou was analyzed from spatial distribution,annual variation,monthly variation,daily variation,using data statistics and climate tendency coefficient analysis methods.The results show that：Chizhou is a multi thunderstorm area in China,the average annual thunderstorm days is 41.2 days,the number of thunderstorm days in mountain areas is obviously higher than that in other areas;Lightning is prone to occur from March to September.Most occurred in July,at least in December.The thunderstorms activity shows a single-peak characteristic with the peak in 15：00—19：00.In recent 50 years,the number of thunderstorm days in Chizhou has shown a trend of decreasing in fluctuation.The thunderstorm activity in Chizhou is in the inactive phase in recent years.