Multi‐Stroke Positive Cloud‐To‐Ground Lightning Sharing the Same Channel Observed With a VHF Broadband Interferometer
Multi‐Stroke Positive Cloud‐To‐Ground Lightning Sharing the Same Channel Observed With a VHF Broadband Interferometer
复制标题
使用 VHF 宽带干涉仪观测到的共享同一通道的多冲正云对地闪电
DOI：
10.1029/2021gl097272
复制
发表时间：
2022
影响因子：
5.2
通讯作者：
J. López
中科院分区：
文献类型：
--
作者：
M. Urbani;J. Montanyá;O. A. Velde;M. Arcanjo;J. López
这项工作提出了一个多冲程的正云到地的闪电共享同一个通道，以非常高的频率宽带干涉仪和闪电映射阵列映射到地面的第一次观察。这种类型的闪电很少被观察到，目前还不清楚它有多频繁，甚至在什么条件下发生。我们的观察表明，第一个向下的积极领导人从一个衰减的负通道启动的情况。在第一次回击之后，一些主要的负通道分支停止传播并且可能被切断。快速反冲先导和/或快速击穿在重新连接这些先前衰减的先导通道和启动随后的正性中风中起着至关重要的作用。我们提出的机制来描述这种现象，使我们能够解释其罕见性和离散的正电荷转移到地面。
This work presents the first observation of a multi‐stroke positive cloud‐to‐ground lightning flash sharing the same channel to ground mapped with a very high frequency broadband interferometer and a Lightning Mapping Array. This type of lightning flash is very rarely observed, and it is currently unclear how frequent it is and even under what conditions it occurs. Our observations indicate a scenario where the first downward positive leader initiates from a decayed negative channel. After the first return stroke, some of the main negative channel branches stop propagating and are likely cut off. A fast recoil leader and/or a fast breakdown play a crucial role in reconnecting these previously decayed leader channels and initiating the subsequent positive stroke. The mechanism we propose to describe the phenomenon allows us to explain its rarity and the discrete positive charge transfer to the ground.
影响因子：
5.2
作者：
Yanan Zhu;P. Bitzer;V. Rakov;M. Stock;J. Lapierre;E. DiGangi;Z. Ding;Bruno L. Medina;L. Carey
通讯作者：
Yanan Zhu;P. Bitzer;V. Rakov;M. Stock;J. Lapierre;E. DiGangi;Z. Ding;Bruno L. Medina;L. Carey
影响因子：
5.2
作者：
Pu, Yunjiao;Cummer, Steven A.;Liu, Ningyu
通讯作者：
Liu, Ningyu