Electric and Magnetic Fields Predicted by Lightning Return Stroke Electromagnetic Models
Electric and Magnetic Fields Predicted by Lightning Return Stroke Electromagnetic Models
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DOI：
10.1109/emczur.2009.4783404
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发表时间：
2009-02
期刊：
影响因子：
--
通讯作者：
Y. Baba;V. Rakov
中科院分区：
文献类型：
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作者：
Y. Baba;V. Rakov
我们已经证明，两种类型的闪电回程电磁模型可以再现在距离自然闪电1至200公里的距离和距离火箭触发闪电数十至数百米的距离上观测到的电场和磁场波形的所有五种特征。该模型包括附加分布串联电感的空气中的垂直电阻导线，以及嵌入在空气中具有高相对介电常数和高相对导磁率的有限厚度圆柱体中的垂直电阻导线。在这两种模型中，垂直导线的分布电阻都是不均匀的：在底部0.5 km以内和沿着通道超过6 km的范围内相对较高。
We have shown that two types of the lightning return-stroke electromagnetic model can reproduce all of the five features of electric and magnetic field waveforms observed at distances ranging from 1 to 200 km from natural lightning and at distances ranging from tens to hundreds of meters from rocket-triggered lightning. The models include a vertical resistive wire in air loaded by additional distributed series inductance, and a vertical resistive wire embedded in a finite-thickness cylinder having both high relative permittivity and high relative permeability surrounded by air. In both models, the distributed resistance of the vertical wire is nonuniform: relatively high within the bottom 0.5 km and beyond 6 km along the channel.