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doi:  10.12013/qxyjzyj2016-008
基于ADTD数据的江西省雷电活动特征分析

Analysis of Lightning Activity Characteristics Based on ADTD Data in Jiangxi Province
摘要点击 1020  全文点击 410  投稿时间:2015-10-10  修订日期:2015-12-26
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基金:  江西省气象局面上项目“江西铁路沿线雷电活动特征及灾害评估”.
中文关键词:  雷电活动,ADTD数据,地闪,雷电幅值,时空分布
英文关键词:  lightning activity, ADTD, CG, lightning amplitude, spatial and temporal distribution
     
作者中文名作者英文名单位
邓德文Deng Dewen江西省气象服务中心, 江西 南昌 330096
汪如良Wang Ruliang
引用:邓德文,汪如良.2016,基于ADTD数据的江西省雷电活动特征分析[J].气象与减灾研究,39(1):63-69
中文摘要:
      利用雷电探测定位系统观测的2008—2014年ADTD资料,分析了江西省雷电活动时空分布特征。结果表明:1) 江西省雷电频数平均为6.12×105 次/a,逐年变化趋势不明显;正地闪电流强度平均为22.22 kA,负地闪平均为-7.99 kA,正地闪电流强度是负地闪电流强度绝对值的2.78倍。2) 6—8月为雷电活动频发时段,正地闪活动比例冬季却最高,秋季次之;午后雷电活动最频繁,其中12—21时为雷电活动最频繁时段,约占总地闪数的79.4%;正地闪电流强度中值为17.46 kA,负地闪电流强度中值为-7.01 kA。3) 雷电活动频数和强度空间分布年际变化较大,其中九江市辖区、南昌东南部—抚州中北部一带局部正地闪比例为9%—15%。
Abstract:
      The spatial and temporal distribution of lightning activities are analyzed by using ADTD data from 2008 to 2014 in Jiangxi province. The results are as follow: 1) Average flash are 6.12×105 fl/a in Jiangxi province and have no significant change in the trend. The average intensity of +CG (22.22 kA) is 1.78 times more than -CG (-7.99kA). 2) From June to August lightning activities are frequent. The ratio of +CG activity is the highest in winter, second in autumn. The period from 12:00 BT to 21:00 BT is the most frequent period of lightning activity, accounts for 79.4% of the total CG. The 50% cumulative probability of +CG lightning intensity is 17.46 kA and -CG is -7.01 kA. 3) The annual spatial distributions of lightning frequency and intensity vary greatly, with partial of municipal district of Jiujiang, southeast of Nanchang, north-central of Fuzhou with +CG ratio around 9%-15%.
主办单位:江西省气象学会 单位地址:南昌市高新开发区艾溪湖二路323号
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