Correlation Between Speed of the Leader and Peak Current of the Return Stroke in Negative Lightning Flashes

被引：2

作者：

Cruz, Ivan T. ^{[1
]}

Saba, Marcelo M. F. ^{[1
]}

Silva, Jose Claudio O. ^{[1
]}

Abbasi, Rasha U. ^{[2
]}

Hunt, Hugh G. P. ^{[3
]}

Schumann, Carina ^{[3
]}

da Silva, Diego R. R. ^{[1
]}

da Silva, Tagianne P. ^{[1
]}

Lauria, Paola B. ^{[1
]}

Kieu, Ny T. ^{[2
]}

机构：

[1] INPE, CCST, Natl Inst Space Res, Sao Jose Dos Campos, Brazil

[2] Loyola Univ, Dept Phys, Chicago, IL USA

[3] Univ Witwatersrand, Sch Elect & Informat Engn, Johannesburg Lightning Res Lab, Johannesburg, South Africa

来源：

GEOPHYSICAL RESEARCH LETTERS | 2025年 / 52卷 / 02期

基金：

巴西圣保罗研究基金会; 新加坡国家研究基金会; 瑞典研究理事会; 美国国家科学基金会;

关键词：

final speed; average speed; peak current; dart leader; stepped leader; high-speed camera; RADIO INTERFEROMETRIC OBSERVATIONS; STEPPED LEADERS; ELECTRIC-FIELD; VIDEO; MODEL;

D O I：

10.1029/2024GL111594

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

This study analyzes the two-dimensional speed profiles of 107 stepped leaders and 93 dart leaders recorded by high-speed cameras in Utah (USA), together with data from lightning location system. The results shows that the final and average speed of the stepped leader has a very strong (R = 0.82) and strong (R = 0.71) correlation with the peak current of the return stroke. It also shows that 91% of the stepped leaders increased their speed near the ground (average increase of 69%). The same analysis for dart leaders shows weak correlation with the peak current of the prospective return stroke (R = 0.39 to average speed and R = 0.28 to final speed). This paper briefly discusses why peak current is better correlated with final speed than with the average speed, and why stepped leaders exhibit a significant correlation, while dart leaders do not.

引用

页数：9

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