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The effects of electric potential on horizontal lightning propagation.

机译：电位对水平雷电传播的影响。

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摘要

Three-dimensional lightning mapping observations are compared to electric potential profiles inferred from balloon soundings of electric field in New Mexico mountain thunderstorms. Two types of comparisons are performed: comparisons of lightning data to individual balloon soundings and comparisons of lightning data to multiple measurements of the electric field. Also, a simulation using energy minimization is used to recreate the lightning data.; First, for six individual intracloud and cloud-to-ground flashes and for a sequence of 36 flashes in one storm, the comparisons to individual balloon soundings consistently show good agreement between the altitudes of horizontal lightning channels and the altitudes of electric potential extrema or wells. The observations reconcile the apparent dichotomy between the complex charge structures often inferred from balloon soundings through storms and the simpler structures often inferred from lightning measurements.; Second, two composites of lightning data are compared to multiple electric field measurements to establish a time independent comparison between the lightning data and the electric field measurements. This comparison shows strong evidence that the electric potential of a thundercloud controls lightning propagation.; Finally, a simulation using random charge distributions and energy minimization is used to recreate the lightning data from the sequence of 35 flashes mentioned above. The simulation is able to recreate several of the properties of the lightning data, for example a segregation seen in the lightning data between intracloud and cloud-to-ground flashes.
机译：将三维闪电映射观测结果与根据新墨西哥州山雷暴中电场的气球测深推断出的电势曲线进行了比较。进行两种类型的比较：将雷电数据与单个气球声音进行比较，并将雷电数据与电场的多次测量进行比较。同样，使用能量最小化的模拟被用于重新创建闪电数据。首先，对于六次单独的云内和云对地闪光，以及一次暴风雨中的36次闪光序列，与单个气球测深的比较一致地显示出水平闪电通道的高度与电势极值或井的高度之间的良好一致性。观察结果调和了通常由暴风雨的气球声推断出的复杂电荷结构与通常由雷电测量推断出的较简单结构之间明显的二分法。其次，将两个雷电数据复合物与多个电场测量结果进行比较，以在雷电数据和电场测量结果之间建立时间独立的比较。这种比较显示出有力的证据，表明雷云的电势控制着闪电的传播。最后，使用随机电荷分布和能量最小化的模拟用于从上述35次闪烁的序列中重建闪电数据。该模拟能够重新创建闪电数据的多个属性，例如，在内部云和云对地闪光之间的闪电数据中看到的隔离。

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  • 作者

    Coleman, Leonidas McLean.;

  • 作者单位

    The University of Mississippi.;

  • 授予单位 The University of Mississippi.;
  • 学科 Physics Atmospheric Science.
  • 学位 Ph.D.
  • 年度 2004
  • 页码 143 p.
  • 总页数 143
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 大气科学（气象学）;
  • 关键词

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