Lightning Discharge as a Self-Organizing Transport Network. Part 2. Reversing Point and Lightning Transients
Abstract
The second part of the study addresses the problem of a lightning discharge macroscale asymmetry. It is shown that the displacement rates of both the reversing point and weighted averaged lightning potential are governed by the difference of peripheral discharge currents. The reversing point movement in the direction of the dominant leader leads to a change in the weighted average lightning potential and serves as a key to explaining the macroscale manifestations of lightning discharge asymmetry. The conditions under which the negative leader becomes -- already at the lightning discharge late development stage -- the dominant one instead of the positive one, which retains its dominance in the overwhelming majority of situations, are studied. Based on the moving reversing point paradigm, the article proposes classification of the main types of transients associated with reactivation of the dominant leader’s decayed branches, i.e., a leader with the prevailing peripheral current. It is shown that the transients caused by reactivation of the dominant negative leader’s decayed branches are polar opposites of the transients associated with the dominance of the positive leader. It has been found that the transients are accompanied by recharging of the leader channel sheath. Under these conditions, the charge per unit length of the highly conductive leader channel core is the recharging process governing parameter. A possible development scenario of compact intracloud discharges is described, which is consistent with the reversing point movement concept formulated in the work.
References
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Работа выполнена при поддержке Российского научного фонда (проект № 23-21-00057)
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The work was supported by the Russian Science Foundation (Project No. № 23-21-00057).
