Electrical structure of a Qinghai-Tibet Plateau thunderstorm based on three-dimensional lightning mapping

被引：32

作者：

Li, Yajun ^{[1
]}

Zhang, Guangshu ^{[1
]}

Wen, Jun ^{[1
]}

Wang, Daohong ^{[2
]}

Wang, Yanhui ^{[1
]}

Zhang, Tong ^{[1
]}

Fan, Xiangpeng ^{[1
]}

Wu, Bin ^{[1
]}

机构：

[1] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou 730000, Gansu, Peoples R China

[2] Gifu Univ, Dept Elect Elect & Comp Engn, Gifu, Japan

来源：

ATMOSPHERIC RESEARCH | 2013年 / 134卷

基金：

中国国家自然科学基金;

关键词：

Charge structure of thunderstorm; Positive charge region; Negative charge region; Three-dimensional lightning mapping; CHARGE STRUCTURE; DISCHARGES; ELECTRIFICATION; SYSTEM; PART;

D O I：

10.1016/j.atmosres.2013.07.020

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

An isolated thunderstorm that occurred on August 6, 2009, in Datong, Qinghai province, China, was studied using a three-dimensional (3D) lightning mapping system distributed at seven stations. This thunderstorm exhibited a dominant positive electric field (corresponding to an overhead positive charge) at the ground. The 3D mapping results show that the thunderstorm took on an inverted dipole charge structure during its developing and mature stages from 09:08 UTC to 09:35 UTC when positive electric field was dominant. During the thunderstorm dissipating stage from 09:35 UTC to 09:58 UTC, the charge structure changed into four layers of positive, negative, positive and negative charges with heights of 5 km (height from the ground), 4 km, 3 km and 1.8 km, respectively. A comparison between the location of the lightning radiation sources and the radar echo shows that the radiation sources of the negative charge region corresponded to the region with radar reflectivity about 40 dBZ in both the developing and mature stages, while for the positive charge radiation sources, they were located in the region with relative weak radar echo in the developing stage but in the mature stage they corresponded to the region with radar reflectivity greater than the 40 dBZ. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：137 / 149

页数：13

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