QIAN Yong,TAN Qiao,JIAO Yang,et al.Analysis on the Spatio-temporal Distribution Features of LightningActivity in Xinjiang Province during 2013-2016[J].Journal of Chengdu University of Information Technology,2018,(01):62-67.[doi:10.16836/j.cnki.jcuit.2018.01.012]
2013-2016年新疆地区闪电活动时空特征分析
- Title:
- Analysis on the Spatio-temporal Distribution Features of LightningActivity in Xinjiang Province during 2013-2016
- 文章编号:
- 2096-1618(2018)01-0062-06
- Keywords:
- meteorological detection technology; lightning protection science and technology; time distribution; spatial distribution; lightning intensity; feature analysis
- 分类号:
- P446
- 文献标志码:
- A
- 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 kA; 正地闪占闪电总数的14.1%,平均电流强度为71.9 kA; 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 kA,60%的闪电不大于35 kA,100 kA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。
- Abstract:
- 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 is 85.9% with the average lightning intensity of 39.9 kA,thepercentage of positive lightning is 14.1% with the average intensity of 71.9 kA; 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 kA, and its maximum value appears during 20～25 kA.About 60% of the lightning intensity is not more than 35 kA, and thenumber of the lightning whose intensity is more than 100 kA 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.
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备注/Memo
收稿日期:2017-07-07基金项目: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)