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广州高建筑物雷电回击光脉冲特征分析

黄晓磊 吕伟涛 武斌 孙秀斌 马颖 陈绿文 齐奇 刘恒毅

黄晓磊, 吕伟涛, 武斌, 孙秀斌, 马颖, 陈绿文, 齐奇, 刘恒毅. 广州高建筑物雷电回击光脉冲特征分析[J]. 热带气象学报, 2021, 37(3): 439-449. doi: 10.16032/j.issn.1004-4965.2021.042
引用本文: 黄晓磊, 吕伟涛, 武斌, 孙秀斌, 马颖, 陈绿文, 齐奇, 刘恒毅. 广州高建筑物雷电回击光脉冲特征分析[J]. 热带气象学报, 2021, 37(3): 439-449. doi: 10.16032/j.issn.1004-4965.2021.042
HUANG Xiaolei, LYU Weitao, WU Bin, SUN Xiubin, MA Ying, CHEN Lyuwen, QI Qi, LIU Hengyi. CHARACTERISTICS OF OPTICAL PULSES INDUCED BY LIGHTNING RETURN STROKES TO TALL STRUCTURES IN GUANGZHOU[J]. Journal of Tropical Meteorology, 2021, 37(3): 439-449. doi: 10.16032/j.issn.1004-4965.2021.042
Citation: HUANG Xiaolei, LYU Weitao, WU Bin, SUN Xiubin, MA Ying, CHEN Lyuwen, QI Qi, LIU Hengyi. CHARACTERISTICS OF OPTICAL PULSES INDUCED BY LIGHTNING RETURN STROKES TO TALL STRUCTURES IN GUANGZHOU[J]. Journal of Tropical Meteorology, 2021, 37(3): 439-449. doi: 10.16032/j.issn.1004-4965.2021.042

广州高建筑物雷电回击光脉冲特征分析

doi: 10.16032/j.issn.1004-4965.2021.042
基金项目: 

国家重点研究发展计划 2017YFC1501504

国家自然科学基金项目 41775010

国家自然科学基金项目 41475003

中国气象科学研究院基本科研业务费专项 2020Z010

详细信息
    通讯作者:

    吕伟涛, 男, 河南省人, 研究员, 博士, 主要从事大气电学和大气探测的研究。E-mail: wtlu@ustc.edu

  • 中图分类号: P427.3

CHARACTERISTICS OF OPTICAL PULSES INDUCED BY LIGHTNING RETURN STROKES TO TALL STRUCTURES IN GUANGZHOU

  • 摘要: 为了深入认识负地闪放电过程中光辐射信号的特性, 对广州高建筑物雷电观测站所获得的回击光脉冲波形进行了分析。对观测到的88例负地闪事件中的184次回击(包括60次下行闪电首次回击、58次下行闪电继后回击、66次上行闪电继后回击)的光脉冲特征进行了统计分析, 结果表明: 下行闪电首次回击光脉冲10%~90%上升时间T1的算术平均值/中值为32.5/31.4μs, 20%~80%上升时间T2的算术平均值/中值为22.6/22.4μs, 半峰宽度T3的算术平均值/中值为131.1/117.0μs。下行闪电继后回击光脉冲T1的算术平均值/中值为30.4/27.7μs, T2的算术平均值/中值为19.5/17.6μs, T3的算术平均值/中值为153.6/142.6μs。在21例下行多回击负地闪事件中, 光脉冲回击间隔时间在12.6~368.6 ms范围之间, 算术平均值为78.7 ms, 有14%闪电事件存在继后回击光脉冲峰值大于首次回击的情况。上行闪电继后回击光脉冲T1的算术平均值/中值为27.5/24.3μs, T2的算术平均值/中值为17.0/15.7μs, T3的算术平均值/中值为132.2/124.5μs。总体上, 下行闪电首次回击的光脉冲上升时间最长、下行闪电继后回击次之、上行闪电继后回击最小; 下行闪电继后回击脉冲半峰宽度比下行闪电首次回击及上行闪电继后回击的更大。

     

  • 图  1  LAPOS观测视野示意图

    图  2  闪电光脉冲示意图

    图  3  回击光脉冲波形参数图

    图  4  闪电先导阶段高速摄像记录示例

    图  5  一次上行负地闪回击的电场变化(a)和亮度变化(b)

    图  6  不同类型击后阶段光脉冲

    a.回击光脉冲半宽可直接计算;b.回击光脉冲半宽需估算。

    图  7  下行负地闪电场变化和亮度变化

    a.闪电事件整体;b.首次回击R1;c.继后回击R2。

    图  8  回击光脉冲波形特征参量箱线图

    表  1  三种回击光脉冲波形特征参量统计结果汇总

    地闪分类 T1/μs
    算术平均值/几何平均值/中值
    T2/μs
    算术平均值/几何平均值/中值
    T3/μs
    算术平均值/几何平均值/中值
    下行闪电首次回击(N=60) 32.5/28.5/31.4 22.6/19.7/22.4 131.1/119.6/117.0
    下行闪电继后回击(N=58) 30.4/27.4/27.7 19.5/17.1/17.6 153.6/146.8/142.6
    上行闪电继后回击(N=66) 27.5/25.8/24.3 17.0/15.0/15.7 132.2/129.0/124.5
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-12-30
  • 修回日期:  2021-04-06
  • 网络出版日期:  2021-09-27
  • 刊出日期:  2021-06-01

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