冀南地区一次强雷暴过程分析  

Analysis of a Heavy Thunderstorm in South Hebei

作　　者：李卫英[1,2] 陈渭民[3] 

机构地区：[1]南京信息工程大学大气科学学院,南京210044 [2]邯郸市气象局,河北邯郸056001 [3]南京信息工程大学江苏省气象灾害重点实验室,南京210044

出　　处：《气象与环境科学》2008年第4期52-57,共6页Meteorological and Environmental Sciences

基　　金：江苏省气象灾害重点实验室项目(KLME050101);国家自然科学基金项目(40175007)资助

摘　　要：利用MTSAT卫星云图、雷达回波、常规天气资料和闪电资料,对2007年7月18日邯郸地区强雷暴天气过程进行了综合分析,结果表明:雷暴云的发展与水汽通量、不稳定区有较好的对应关系。雷暴初始阶段,地闪以负闪为主,正闪较少;随云系发展,闪电密度增大;云系发展成熟阶段,正闪密度变化不大,负闪密度明显减小。雷暴云回波强度>36 dB z,就有闪电发生,且强回波区与闪电区一致。Based on MTSAT satellite cloud images, radar echo materials, normal weather and lightning data, the heavy thunderstorm happened in South Hebei on 18th July, 2007 is analyzed. Result shows that the growth of thunderstorm is in good accord with vapor flux and instable area. Ground lightning is mainly positive in original stage; with the growth of cloud, the density of lightning increases; in mature stage, positive lightning density doesn＇ t change much but the negative decreases to a great extent. Lightning will happen if the intensity of thunderstorm echo is more than 36dBz, and strong echo is in good agreement with lightning area.

关 键 词：强雷暴 闪电 卫星云图 雷达回波 

分 类 号：P458.3[天文地球—大气科学及气象学]