Effects of Charge Distribution in Thunderstorms on Lightning Propagation Paths in Darwin, Australia
Effects of Charge Distribution in Thunderstorms on Lightning Propagation Paths in Darwin, Australia
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DOI：
10.1175/2010jas3597.1
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发表时间：
2011-04
影响因子：
3.1
通讯作者：
M. Akita;S. Yoshida;Y. Nakamura;T. Morimoto;T. Ushio;Z. Kawasaki;Daohong Wang
中科院分区：
文献类型：
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作者：
M. Akita;S. Yoshida;Y. Nakamura;T. Morimoto;T. Ushio;Z. Kawasaki;Daohong Wang
摘要 雷云中的电荷分布对于雷电放电的引发和传播起着重要作用。为了进一步了解电荷分布对闪电放电的影响，作者使用 VHF 宽带数字干涉仪 (DITF) 在澳大利亚达尔文 2006/07 季风期间进行了一次甚高频 (VHF) 闪电观测活动。气象局 (BOM) 研究中心使用 C 波段偏振天气雷达来估计降水剖面，例如水凝物分类。云对地（CG）和云内（IC）闪光分别从霰体区域上侧的外部和内部引发。在CG闪光的情况下，负先导首先水平穿过正电荷区域约10公里，然后当它们到达正电荷区域的边缘时开始向地面弯曲，那里下面没有霰石区域。相比之下，在这些情况下...
AbstractThe charge distributions in a thundercloud play an important role in the initiation and propagation of lightning discharges. To further understand the effects of charge distributions on lightning discharge, the authors conducted a very high-frequency (VHF) lightning observation campaign during the 2006/07 monsoon in Darwin, Australia, using a VHF broadband digital interferometer (DITF). A C-band polarimetric weather radar to estimate the precipitation profiles such as hydrometeor classification was operated by the Bureau of Meteorology (BOM) Research Centre. Cloud-to-ground (CG) and intracloud (IC) flashes were initiated from the outer and the inner parts of the upper side of the graupel regions, respectively. In the cases of CG flashes, the negative leaders travel first about 10 km horizontally through positive charge regions and then begin to bend toward the ground when they reach the edge of the positive charge regions where there is no graupel region underneath. In contrast, in the cases of th...