J4 ›› 2005, Vol. 23 ›› Issue (3): 26-33.

• 论文 • 上一篇    下一篇

冰雹过程中闪电演变和雷达回波特征的综合分析

李国昌李照荣李宝梓   

  1. 甘肃省人工影响天气办公室,甘肃 兰州 730020
  • 收稿日期:2005-08-01 修回日期:2005-09-02 出版日期:2005-09-30 发布日期:2005-09-30
  • 作者简介:李国昌(1965-),男,甘肃会宁人,工程师,在读硕士,主要从事管理、科研工作
  • 基金资助:

    甘肃省人工增雨防雹作业决策指挥系统(2002人影-3)、国家科技攻关计划:西部开发科技行动重大项目"祁连山空中云水资源开发
    利用研究”(2004BA901A16)和甘肃省气象局"云水资源及降水量时空分布的卫星遥感监测研究”0200 L人影一L-2}资助

Analysis between Lightning Evolution and Radar Echo Feature in Hailstorm Process

 LI Guo-Chang, LI Zhao-Rong, LI Bao-Zi   

  1. Gansu Wcathcr Modification Office I}anzhou 730020,China
  • Received:2005-08-01 Revised:2005-09-02 Online:2005-09-30 Published:2005-09-30

摘要:

应用闪电定位网的资料和多普勒雷达资料,分析西北地区的降雹过程,详细讨论了200年5月15日发生在兰州皋兰的一次降雹雷雨云的闪电演变、雷达回波特征和云特定参数之间的相互关系,对此雷雨云的闪电机制和电结构进行了分析推断。在皋兰产生降雹的个例分析表明,云中液态水含量是否出现高值区,是识别降雹开始的重要因子。在雷雨云移动路径上,总闪和云闪为线状分布,地闪集中分布在降雹区,云闪最多,地闪中绝大多数为负闪。综合计算降雹时段云参数分析表明,云中降水率和含水量对产生闪电相对敏感,推断这次雷雨云的电结构可能属于上正下负的偶极子型

关键词: 雷暴, 闪电演变, 强对流天气, 雷达回波, 液态含水量

Abstract:

Using the lightning position network and Doppler radar data, a hailstorm occurred on May 15,2004 over Gaolan county of Lanzhou city has been analyzed,especially, the relationship between lightning evolution and radar echo feature as well as cloud characteristic parameters of the thundercloud was discussed in detail,then the lightning mechanism and the structure of electric field of thundercloud have been analyzed.
A case study of the hailstorm in Uaolan county indicated that if there was the maximum region of cloud liquid water content, then it could be an important factor to identify the beginning of hail falling. The  total lightning and cloud lightning presented linear distribution over the moving track of the
ground lightning concentrated in hail falling zone the most ground lightning was minus.hc analysis thundercloud,and the results show that the
cloud precipitation efficiency and cloud water content Were sensitive to generating lightning.

Key words: hailstorm, lightning evolution, severeconvection weather, radar echo, liquid water content

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