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中国农学通报 ›› 2019, Vol. 35 ›› Issue (36): 110-115.doi: 10.11924/j.issn.1000-6850.casb18080042

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

基于VLF/LF三维闪电探测系统的贵州省全闪分布特征分析

丁旻, 刘波, 陈春   

  1. 贵州省气象灾害防御技术中心
  • 收稿日期:2018-08-10 修回日期:2019-02-15 接受日期:2019-02-25 出版日期:2019-12-26 发布日期:2019-12-26
  • 通讯作者: 丁旻
  • 基金资助:
    贵州省科学技术基金“贵州省雷电易发性分析及灾害风险评价研究”(黔科合基础[2018]1065)。

Lightning in Guizhou: Distribution Characteristic Analysis Based on VLF/LF 3D Lightning Monitoring System

  • Received:2018-08-10 Revised:2019-02-15 Accepted:2019-02-25 Online:2019-12-26 Published:2019-12-26

摘要: 为进一步加强云闪分布特征分析,增强对雷暴云内物理过程的认识,利用2015—2017 年VLF/LF三维闪电探测系统的数据资料对贵州省闪电特征进行空间和时间分布特征分析。结果表明:无论云闪还是地闪,均以负闪为主;闪电发生主要集中在夏季,冬季闪电最少,闪电月际分布主要为单峰型,仅冬季Z比率大于1;闪电主要发生时段为16 时至次日凌晨2 时,Z比率与全闪频数随时间的变化呈正相关,相关系数0.618;全省闪电密度整体呈西高东低趋势,年均闪电密度为5.07 次/(a ·km2);云闪主要发生在高度2k~7 km,全年云闪高度呈下降趋势;雷电强度主要分布在5k~45 kA,平均陡度为7.34 kA/μs。本研究有利于对闪电特征开展更全面的探究和分析,同时对强对流天气监测和预警也有重要意义和价值。

关键词: 高粱, 高粱, 组培育种、 航天育种 、物理诱变育种 、化学诱变育种 、转基因育种

Abstract: The paper aims to strengthen the analysis of IC distribution characteristics, enhance the knowledge of the physical processes in thunderstorm clouds. We analyzed the spatial and temporal distribution characteristics of lightning in Guizhou by using the data of VLF/LF 3D lightning detection system from 2015 to 2017. The results showed that: both IG and CG were mainly negative; lightning occurred mainly in summer, with the least in winter; the lightning distribution was mainly single peak; only in winter, the Z ratio was greater than 1; lightning mainly occurred from 4 pm to 2 am the next day; the Z ratio was positively correlated with the change of the total lightning frequency with time, and the correlation coefficient was 0.618; the lightning density in Guizhou showed a tendency with high in west and low in east, with an average annual lightning density of 5.07 times /(a·km2); the height of IC mainly occurred from 2k-7 km; the annual IC height showed a downward trend; lightning intensity was mainly distributed in 5k-45 kA with the average total lightning current gradient of 7.34 kA/μs. This study is conducive to the exploration of lightning characteristics, as well as the monitoring and early warning of strong convection weather.

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