邯郸地区地闪特征分析

利用2005～2008年邯郸闪电监测资料,分析了邯郸雷电发生规律和特征。结果表明:地闪中负地闪占绝对优势,地闪和负闪在2～11月呈单峰分布,7月达峰值,8月次之,与对流活动和降水最多时段相对应;地闪日变化曲线呈4峰分布,15时出现最高峰值,19时次之,地闪的日变化也与强对流天气的日变化规律一致,正闪滞后于负闪发生;正闪与总地闪比值的日变化表明对流天气一般在16时以后发展强盛,17～19时是一天中对流天气最易发展成熟的时段;闪电的高密度区集中出现在中西部地区,具有明显的地理特征。

Analysis of Ground Lightning Characteristics in Handan

Based on the monitoring data of lightning from 2005-2008 in Handan,the law and characteristics of lightning were analyzed.Result showed that,negative ground lightning was the dominant one in ground lightning.Ground lightning and negative ground lightning were in unimodal distribution from February to November,both reached the peak in July and in August,which was corresponding to the period when convective activity and precipitation occurred most frequently.The diurnal variation curve of ground lightning was in four-peak distribution,which reached the peak at 15:00 and 19:00.Otherwise,the diurnal variation of ground lightning was consistent to the law of diurnal variation when severe convective weather happened,positive ground lightning occurred behind negative ground lightning The diurnal variation corresponding to the ratio between positive ground lightning and total ground lightning indicated that severe convective weather generally grew intensely after 16:00,and the time when convective weather grew mature in one day from 17:00 to 19:00.The mid-west areas were the areas where lightning with high density took place the most frequently and showed significant characteristics.