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Interaction between adjacent lightning discharges in clouds


Journal

Advances in Atmospheric Sciences

Authors

Wang Yanhui,Zhang Guangshu,Zhang Tong,li Yajun,Wu Bin,Zhang Tinglong

Year

2013

Volume

30

Issue

4

Pages

1106-1116

Corresponding Author

Wang, YH

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wyh2005@lzb.ac.cn

Keywords

associated lightning; inverted-polarity intracloud discharge; charge region; electrical structure

Abstract

Using a 3D lightning radiation source locating system (LLS), three pairs of associated lightning discharges (two or more adjacent lightning discharges following an arbitrary rule that their space-gap was less than 10 km and their time-gap was less than 800 ms) were observed, and the interaction between associated lightning discharges was analyzed. All these three pairs of associated lightning discharges were found to involve three or more charge regions (the ground was considered as a special charge region). Moreover, at least one charge region involved two lightning discharges per pair of associated lightning discharges. Identified from electric field changes, the subsequent lightning discharges were suppressed by the prior lightning discharges. However, it is possible that the prior lightning discharge provided a remaining discharge channel to facilitate the subsequent lightning discharge. The third case provided evidence of this possibility. Together, the results suggested that, if the charges in the main negative charge region can be consumed using artificial lightning above the main negative charge regions, lightning accidents on the ground could be greatly reduced, on the condition that the height of the main negative charge region and the charge intensity of the lower positive charge region are suitable.