【摘要】 利用山东地区2006年6月至2007年10月13站的闪电资料,分析了该地区闪电密度的时空分布特征。结果表明:13站相比5站布局,获取的闪电样本更多,代表性更好,探测精度更高,分析结果存在差异;闪电密度高值区域出现一定的南移,在半岛内陆地区和东部荣成市出现了新的高值区域,负闪所占比例增加,占99.06%,平均闪电强度增大,负闪平均强度11.47 kA明显低于正闪平均强度25.04 kA;正、负闪电频次年、日变化均呈双峰值特征,但不同时间、不同区域之间存在差异;闪电强度季节变化呈单峰谷形式,但各区域峰谷时间有差异,且冬季没有正闪电发生。更多还原

【Abstract】 Based on the data from June 2006 to October 2007 in Shandong,the temporal and spatial distribution of lightning density was analyzed.Result showed that more lightning samples,better representation and higher accuracy can be obtaind from 13 stations layout than 5 stations layout.The high-value area of lightning density moved south to a certain extent,new high-value area appears in Rongcheng and inland areas in Bandao.The percentage of negative flash increases,accounts for 99.06%.The average intensity of lightning increases,and the intensity of negative flash is significantly lower than positive flash.The yearly variation has double peaks,but the date with peak is different at different period,and the regional differences existed.And so does the daily variation.The average intensity of lightning occurs clearly with a characteristic of seasonal variation,in which there are one peak and one valley.But the dates with peak and valley are different in four regions,and the positive lightning did not appear in winter.更多还原