Small-Scale Discharges Observed Near the Top of a Thunderstorm

被引：2

作者：

Scholten, O. ^{[1
,2
]}

Hare, B. M. ^{[1
]}

Dwyer, J. ^{[3
,4
]}

Liu, N. ^{[3
,4
]}

Sterpka, C. ^{[3
,4
]}

Assink, J. ^{[5
]}

Leijnse, H. ^{[6
]}

ter Veen, S. ^{[7
]}

机构：

[1] Univ Groningen, Kapteyn Astron Inst, Groningen, Netherlands

[2] Vrije Univ Brussel, Interuniv Inst High Energy, Brussels, Belgium

[3] Univ New Hampshire, Dept Phys, Durham, NH USA

[4] Univ New Hampshire, Space Sci Ctr EOS, Durham, NH USA

[5] Royal Netherlands Meteorol Inst, R&D Seismol & Acoust, De Bilt, Netherlands

[6] Royal Netherlands Meteorol Inst, R&D Observat & Data Technol, De Bilt, Netherlands

[7] Netherlands Inst Radio Astron ASTRON, Dwingeloo, Netherlands

来源：

GEOPHYSICAL RESEARCH LETTERS | 2023年 / 50卷 / 08期

基金：

爱尔兰科学基金会; 英国科学技术设施理事会;

关键词：

D O I：

10.1029/2022GL101304

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We have used the LOw-Frequency ARray (LOFAR) to image a few lightning flashes during a particularly severe thunderstorm. The images show an exceptional amount of VHF activity at altitudes above 10 km. Much of this is in the form of small-scale discharges, not exceeding a few hundred meter, occurring seemingly randomly around the centers of active storm cells. To emphasize the incidental nature of these small-scale discharges or sparks we refer to them as "sparkles." A detailed investigation shows evidence that these sparkles are indicative of positive leader channels and that they are equivalent to the needle activity seen around positive leader tracks at lower altitudes.

引用

页数：9

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