摘要
针对新疆地区闪电活动特性的研究相对比较少,利用闪电监测定位系统(ADTD)获取的地闪资料,采用数理统计的方法,分析了新疆地区2013-2016年闪电活动的时空分布特征。结果表明:负地闪占闪电总数的85.9%,平均电流强度为39.9 k A;正地闪占闪电总数的14.1%,平均电流强度为71.9 k A;闪电频次月变化呈单峰型分布,主要集中在5-9月,占总闪电频次的96.5%,高发月在6-7月,占总闪电频次的67.5%;闪电频次日变化呈单峰单谷型,高发时段主要集中在15-19时,占闪电总频次的46.3%;闪电强度主要集中在10~50 k A,60%的闪电不大于35 k A,100 k A以上闪电仅占总数的6.2%;闪电主要分布在北疆西北地区,其中吉木乃县是闪电发生的高密度区,南疆闪电发生相对较少。闪电活动特征呈明显的地域性差异。
There are relatively few studies on the characteristics of lightning activity in Xinjiang Province,based on the cloud-to-ground lightning data collected by the lightning detection and location system,the method of mathematical statistics is used.Moreover,the spatio-temporaldistribution features of cloud-to-ground lightning in Xinjiang area from 2013 to 2016 are analyzed. The results are showed asfollows： the percentage of negative lightning to total lightning number is85.9 % with the average lightning intensity of 39.9 k A,thepercentage of positive lightning is 14.1 % with the average intensity of 71.9 k A; monthly variation of lightning frequency shows obviously singlepeak,and the number of the lightningappearing from May to September is 96.7 % of the annual total.The lightning appears most frequently in June to July,accounting for 67.5 % of the total frequency of lightning; daily variation of lightning frequency shows obviously single peak and single valley,and lightning duration is mainly concentrated at 3-7 PM,accounting for 46.3 % of the total frequency of lightning; the intensity ofpositive and negative lightning mainly concentrate in 10 ~ 50 k A,and its maximum value appears during 20 ~ 25 k A. About 60 % of the lightning intensity is not more than 35 k A,and thenumber of the lightning whose intensity is more than 100 k A accounts for 6.2 % of the total; lightning is mainly distributed in the northwest of Xinjiang,Jimunai County is high density area of lightning frequency,and the lightning occurrence is relatively small in the southern of Xinjiang.The characteristics of lightning activity are obviously differentin differentregions.
作者
钱勇
谭侨
焦阳
张永军
王延慧
张晗
QIAN Yong, TAN Qiao, JIAO Yang, ZHANG Yong-jun, WANG Yan-hui, ZHANG Han(Xinjiang Meteorological Disaster Prevention Technology Centre, Wulumuqi, China,830001)
出处
《成都信息工程大学学报》
2018年第1期62-67,共6页
Journal of Chengdu University of Information Technology
基金
国家自然科学基金资助项目(41775009)
新疆气象局青年基金资助项目(Q201710
MS201808)
关键词
气象探测技术
雷电防护科学与技术
时间分布
空间分布
闪电强度
特征分析
meteorological detection technology
lightning protection science and technology
time distribution
spatial distribution
lightning intensity
feature analysis
