Does the lightning current go to zero between ground strokes? Is there a current "cutoff"?

被引：18

作者：

Ngin, T. ^{[1
]}

Uman, M. A. ^{[1
]}

Hill, J. D. ^{[2
]}

Olsen, R. C., III ^{[2
]}

Pilkey, J. T. ^{[1
]}

Gamerota, W. R. ^{[1
]}

Jordan, D. M. ^{[1
]}

机构：

[1] Univ Florida, Gainesville, FL 32611 USA

[2] Stinger Ghaffarian Technol, Kennedy Space Ctr, FL USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2014年 / 41卷 / 09期

关键词：

PHYSICAL PROCESSES; ELECTRIC-FIELDS; DART LEADERS; DISCHARGES; CHANNELS;

D O I：

10.1002/2014GL059601

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

At the end of 120 prereturn stroke intervals in 27 lightning flashes triggered by rocket-and-wire in Florida, residual currents with an arithmetic mean of 5.3 mA (standard derivation 2.8 mA) were recorded. Average time constants of the current decay following return strokes were found to vary between 160 mu s and 550 mu s, increasing with decreasing current magnitude. These results represent the most sensitive measurements of interstroke lightning current to date, 2 to 3 orders of magnitude more sensitive than previously reported measurements, and contradict the common view found in the literature that there is a no current interval. Possible sources of the residual current are discussed.

引用

页码：3266 / 3273

页数：8

共 36 条

[1] Dependence of lightning rod efficacy on its geometric dimensions - a computer simulation [J].