摘要
利用苏州地区2002～2004年闪电定位系统监测资料，分析了该地区地闪的月变化、H变化、强度、闪电密度等特征。结果表明，苏州地区地闪的月变化呈单峰分布，而H变化则呈双峰分布，夏季19时左右是该地区强对流天气最易发展成熟的时段；雷电流强度不大于10^4A所占比例最大，强度大于10^4A的强雷电主要集中在南部地区，以正闪为主；苏州市区是闪电频发的中心地带；闪电多发区与当地的环境有很大关系。
By using the lightning data from 2002 to 2004 in Suzhou, lightning characteristics such as monthly variation, daily variation, intensity of lightning current and lightning density are analyzed. The results indicate that monthly and daily variation shows bimodal undulation in Suzhou. The critical stage occurs about 19：00 pm at summer when severe convection is very easy to develop and be mature. Intensity of lightning current which is less than or up to 10 KA accounts for the largest share,but ones which is more than 10 KA mostly locate in southern region, which mostly are positive flashes. The biggest flashes frequency center locate in the city of Suzhou. Furthermore, the spatial distribution of lightning is closely related to the environment in this region.
出处
《气象科学》
CSCD
北大核心
2006年第4期442-448,共7页
Journal of the Meteorological Sciences
基金
江苏省气象灾害重点实验室(南京信息工程大学)项目(编号:KLME050101)
国家自然科学基金项目(编号:404750)共同资助
关键词
闪电定位仪
闪击次数
雷电流强度
闪电密度
Lightning Location System （LLS） Lightning frequency Intensity of lightning current Lightning density
