New insights into the lightning discharge processes
New insights into the lightning discharge processes
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DOI：
10.1088/1361-6595/ac9330
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发表时间：
2022-10
影响因子：
3.8
通讯作者：
V. Rakov;M. D. Tran;Y. Zhu;Z. Ding;A. Leal;I. Kereszy;S. Chen
中科院分区：
文献类型：
--
作者：
V. Rakov;M. D. Tran;Y. Zhu;Z. Ding;A. Leal;I. Kereszy;S. Chen
本文综述了佛罗里达盖恩斯维尔的闪电观测站对闪电放电的观测结果。最重要的结果包括：（a）高强度（150 kA）负闪电放电中的击穿、步进先导和回击过程的特征;（B）与地面接触并产生回击的双向先导的第一个高速视频图像;（c）发现与同一先导的相邻分支的侧表面碰撞的负阶状先导分支，（d）关于密集云内放电发生背景和性质的新数据，以及（e）观测在双极云对地闪电放电期间发生的地面伽马射线闪光。这些结果有助于提高我们对闪电物理学的理解，对闪电建模，防雷和高能大气物理学研究具有重要意义。
This review covers selected results of recent observations of lightning discharges performed across the entire electromagnetic spectrum (radiofrequency, optical, and energetic radiation) at the Lightning Observatory in Gainesville, Florida. The most important results include (a) characterization of the preliminary-breakdown, stepped-leader, and return-stroke processes in high-intensity (⩾50 kA) negative lightning discharges, (b) the first high-speed video images of bidirectional leader that made contact with the ground and produced a return stroke, (c) discovery of negative stepped leader branches colliding with the lateral surface of neighboring branches of the same leader, (d) new data on the occurrence context and properties of compact intracloud discharges, and (e) observation of a terrestrial gamma-ray flash that occurred during a bipolar cloud-to-ground lightning discharge. The results serve to improve our understanding of the physics of lightning with important implications for lightning modeling, lightning protection, and high-energy atmospheric physics studies.