关键词: 地闪, 持续性, 地闪密度, 丹东, 阜新

Abstract: The cloud-to-ground (CG) lightning data in 2007 were analyzed in Liaoning province. The results show that Dandong and Fuxin are two high risk regions of CG lightning in Liaoning province. CG lightning changes in two regions are of not only homology, but also difference. The negative CG lightning is far more than the positive CG lightning, while the ratio of positive and negative CG lightning is close in two regions. The ratio of positive and negative CG lightning is higher in spring and lower in summer. The average current intensity of CG lightning peak value in Dandong is higher than that in Fuxin. CG lightning usually appears from afternoon to night, while it is in morning over Dandong. The concept of CG lightning continued hours is defined. It indicates that CG lightning concentrates in 6 hours or more than 6 hours CG lightning process. Thus, CG lightning remained more than 6 hours is of larger potential hazards. CG lightning events often happen from May to October in Dandong and from May to August in Fuxin. CG lightning activities in August and July are the most active in Dandong and Fuxin, respectively.