基于ADTD监测网络2012年云南省地闪特征分析

The researching based on the ADTD lightning monitoring network in the lightning distribution featuresin of Yunna province(2011—2013)

根据云南省气象部门2012年ADTD型闪电定位仪资料,以昭通、丽江、楚雄、德宏、文山、西双版纳等6个地区为代表,研究了云南省地闪在时间和强度方面的变化特征,又采用了网格法对云南省地闪频数进行划分,绘制了云南省闪电密度分布图,研究了云南省地闪在空间方面的分布情况.结果表明:云南省雷电总的地域分布趋势是,东部比西部少,中部多而南北少,大型水体附近较其他地方多,北部强度较大,全省地闪以负闪为主,雷暴发生时间主要集中在5—9月,雷电多发时段在15—19时,时段因地理位置和地形地貌而提前或推迟.

In this paper,six representative areas(including Zhaotong,Lijiang,Chuxiong,Dehong,Wensha and Xishuangbanna) where information is complete and distribution is even have been selected according to information for 2011 to 2013 from lightning position indicators in Yunnan meteorological departments for studying features of lightning distribution in Yuannan province from patialtemporal changing features of lightning frequency,strength distribution,topography and other aspects.The result shows that:the overall regional lightning distribution in Yunnan province is that the eastern part is less than the western part;the middle part is more than the southern and northern parts;places near to large-scale water are more than other places;the northern part is stronger in strength;most cloud-to-ground lightning of the whole province is negative;thunderstorms are concentrated in months from May to September and most in the period from 3 p.m to 7 p.m;the time periods for happening vary according to geographic positions and landforms.