黑龙江省雷电活动气候特征分析  

Analysis of climatic character of lightning activity in Heilongjiang Province

作　　者：钟幼军[1] 曹铁英[1] 宫延平[1] 于震宇[1] 张治[1] 赵广娜[1] 

机构地区：[1]黑龙江省气象台,黑龙江哈尔滨150030

出　　处：《自然灾害学报》2007年第5期79-83,共5页Journal of Natural Disasters

基　　金：黑龙江省科技厅攻关项目(GC05C106)

摘　　要：利用黑龙江省闪电定位网在2005年4月至2006年间得到的285347次地闪资料,分析了雷电参数的月变化、年变化及其空间分布的气候特征,结果显示,正闪占总闪的比例仅为5.84%和7%,地闪密度的高值中心分别在(127.3°E,46.3°N)和(123.5°E,52.9°N)附近;总体日变化特征明显,呈一峰一谷态势,分别为18时和10时;一年中雷电活动主要出现在7,8月份,正云地闪的平均强度明显大于负云地闪。云地闪主要集中在两个区域的分布表明:雷电活动特征可以基本揭示该地区天气活动的时空分布规律。Based on the cloud-to-ground （CG） data coUected by location lightning detection network in Heilongjiang Province from 2005 to 2006, a study was made on the daily and monthly lightning variation, as well as lightning intensity, polarity and density, etc. , and the climatic characteristics of lightning in Heilongjiang was analyzed. The results show that most cloud-to-ground flashes are negative; the mean intensity of positive CG flashes is bigger than that of the negatives; the CG flashes have a daily variation characteristic with one peak and one valley; the maximum number of lightning days is found in July and August; CG flashes occur mostly in two areas, and the spatial distribution of hghtning could exhibits the climatological regularity of the convective activity.

关 键 词：云地闪 时空分布特征 黑龙江省 

分 类 号：P468.028[天文地球—大气科学及气象学]