辽宁省雷电易发区及预警应对等级划分

基于辽宁省1981-2010年雷暴日数据、2012-2019年闪电定位数据和2015年公里网格GDP及人口数据,采用AHP法、风险矩阵法和ArcGIS空间分析方法,分析了辽宁省闪电活动时空特征,得出10km×10km网格区域雷电易发等级及应对等级。结果表明:辽宁省2012-2019年闪电活动日数总体呈下降趋势。闪电活动主要发生在6-9月,总闪和负闪最大值出现在8月,正闪活动最大值出现在6月;辽宁地区年平均雷暴日数的空间分布趋势呈现北部比南部多,东西部比中部多,从地形地貌上看,辽宁地区雷暴日数空间分布符合山地大于平原,平原大于沿海地区的分布规律。辽宁地区雷电易发区域呈自中部丘陵和平原地区向东西部山区逐渐递减的分布趋势,雷电易发区域与经济发达区大体重叠,需引起重视。

Classification of Response Levels in Lightning-Prone Areas in Liaoning Province

Based on the data of thunderstorm days from 1981 to 2010, lightning location from 2012 to 2019, and GDP of the kilometer grid and population in 2015 in Liaoning Province, using the AHP method, risk matrix method and ArcGIS spatial analysis method, the temporal and spatial characteristics of lightning activities in Liaoning Province are analyzed, and the lightning susceptibility level and response level of the 10 km×1 km grid area are obtained. The results indicate that the number of days of lightning activity showed an overall downward trend from 2012 to 2019 in Liaoning Province. Lightning activities mainly occurred from June to September. The maximum total and negative lightning activities appeared in August, and the maximum positive lightning activities appeared in June. The spatial distribution trend of the annual average number of thunderstorm days in Liaoning shows that there were more thunderstorm days in the northern Liaoning than in the southern, and more in the eastern and western Liaoning than in the central part. From the perspective of topography and geomorphology, in the spatial distribution, the numbers of thunderstorm days in mountain areas were greater than those in plains areas, and larger in plains than in coastal areas. The lightning prone areas in Liaoning showed a decreasing distribution trend from the central hills and plains to the eastern and western mountainous areas. The lightning prone areas roughly overlapped with economically developed areas, so attention should be paid.