【摘要】 利用 1997年和 1998年 6～ 8月间在甘肃平凉地区的 3站闪电定位系统所取得的地闪资料与当天早晨探空资料进行了初步的统计分析。分析表明 ,对流风暴中地闪活动与环境层结因子之间有较好的相关性 ,不稳定度、余额不稳定度 5℃处的环境温度、温度层结中 (中层 )平均相对湿度是影响对流风暴中地闪活动的重要因子 ,对流风暴的地闪活动可通过这些因子进行预报。更多还原

【Abstract】 Statistical analyses are made of morning sounding data and ground flash data from June to August 1997 and 1998, the latter was obtained with a 3\|station lightning direction finder network installed in Pingliang. The results show that there is good correlation between total ground flash number of convective storm and environmental stratification factors. Atmospheric instability, ambient temperature at altitude with residual instability of 5℃and mean relative humidity in the middle layer are important factors, which affect the ground flash frequency of storm, therefore can be used for lightning activity forecast.更多还原