【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。更多还原

【Abstract】 Based on the cloud-to-ground(CG) data collected 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 cloudto-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 lightning could exhibits the climatological regularity of the convective activity.更多还原