地闪与对流性天气系统中降水关系的分析  

THE RELATIONSHIP BETWEEN CLOUD TO GROUND LIGHTNING AND PRECIPITATION IN THE CONVECTIVE WEATHER

作　　者：周筠君[1] 郄秀书[1] 张义军[1] 葛正谟 楚荣忠[1] 张鸿发[1] 张广庶[1] 王怀斌[1] 贾伟[1] 

机构地区：[1]中国科学院兰州高原大气物理研究所

出　　处：《气象学报》1999年第1期103-111,共9页Acta Meteorologica Sinica

基　　金：中国科学院"西部之光"计划;甘肃省优秀青年基金;国家自然科学基金;中国科学院重大项目

摘　　要：利用１９９７年夏季在中国科学院兰州高原大气物理所平凉雷电与暴雹实验站设置的３站闪电定位系统所取得的地闪资料与雷达、降水及探空等资料进行了对比分析，发现地闪与对流性天气中的降水有较好的相关性，这种相关性用来对一般性对流天气中降水进行估测是可行的。通过非线性回归近似拟合得到平均雨强与对应时段内的地闪数回归方程为Ｒ＝１．６９２ｌｎＦ－０．２７３，相关系数ｒ为０．８６４１。同时地闪频数与层结最大不稳定能量一样能够指示对流性天气的发生和发展。Based on the observation data of the lightning location system (three direction finders are set at Liupan mountain, Penyang and Pingliang lightning and thunderstorm experiment station respectively), radar, sounding and other weather background at Pingliang lightning and thunderstorm experiment station of Chinese Academy of Science between June and August in 1997, compared their applications in convective weather observation,it is found that cloud to ground lightning is an important index. The correlation coefficient between cloud to ground lightning and the precipitation in convective weather is so high that cloud to ground lightning can estimate precipitation. The regression equation between the precipitation intensity ( R ) and the frequency of cloud to ground lightning ( F ) is R=1.692 ln F-0.273 , and the correlation coefficient r is 0.8641. The frequency of cloud to ground lightning is just like the convective available potential energy, it can show the formation and development of the convective system.

关 键 词：地闪 对流性天气 降水 

分 类 号：P458[天文地球—大气科学及气象学] P427.321