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题目：Characteristics of negative lightning leaders to ground observed by TVLS 杂志：Journal of Atmospheric and Solar-Terrestrial Physics 数据库：SD DOI：10.1016/j.jastp.2015.07.008 卷：136, Part A 年份：2015 |
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lzg020716
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stone7058: 金币+5, ★★★★★最佳答案 2016-10-11 07:49:21
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Characteristics of negative lightning leaders to ground observed by TVLS 作者:Qiu, S (Qiu, Shi)[ 1 ] ; Jiang, ZD (Jiang, Zhidong)[ 1 ] ; Shi, LH (Shi, Lihua)[ 1 ] ; Niu, ZC (Niu, Zhencong)[ 2 ] ; Zhang, P (Zhang, Peng)[ 3 ] JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS 卷: 136 页: 31-38 子辑: A 特刊: SI DOI: 10.1016/j.jastp.2015.07.008 出版年: DEC 2015 查看期刊信息 摘要 The Thunder and VHF lightning Locating System (termed TVLS) is established and utilized to observe leader behaviors of negative cloud to ground (CG) flashes. This system takes advantages of VHF broad-band interferometer and thunder imaging technique, which could provide the temporal and quasi-3D spatial evolution of lightning discharges. In conjunction with synchronized electric field changes (E-changes) and electric field derivatives (dE/dt) records, 10 leaders from two CG flashes are presented and analyzed. Based on the characteristic evolution of leader velocities, E-changes, dE/dt waveforms and VHF intervals, three stepped leaders, five dart leaders and two dart-stepped leaders are identified. The stepped leaders behave impulsive while approaching ground, with average speed (1.3 similar to 3.9) x 10(5) m/s. All normal dart leaders presented here exhibit irregular (or termed "chaotic"  fluctuations in E-change and dE/dt waveforms, with the similar speeds ((1.0 similar to 2.9) x 10(7) m/s) and durations ((300 similar to 700) mu s) of the "chaotic" leaders observed by other investigators. The irregular fluctuations would be weak if the channels keep conductive until the leader enters the less conductive branches, coinciding with VHF radiations in time sequence. The dart-stepped leader could be divided into the dart stage and the stepped stage by a transition region, which usually lies around the branch junctions of previous active channel. The dart stage resembles the normal dart leader, and the stepped stage usually associates with regular pulse trains in E-change and dE/dt waveforms. (C) 2015 Elsevier Ltd. All rights reserved.关键词 作者关键词:Lightning leader; Dart-stepped; Chaotic; TVLS KeyWords Plus:RETURN STROKES 作者信息 通讯作者地址: Qiu, S (通讯作者) 显示增强组织信息的名称 PLA Univ Sci & Technol, Natl Key Lab Electromagnet Environm Effects & Ele, Nanjing, Jiangsu, Peoples R China. 地址: 显示增强组织信息的名称 [ 1 ] PLA Univ Sci & Technol, Natl Key Lab Electromagnet Environm Effects & Ele, Nanjing, Jiangsu, Peoples R China [ 2 ] Army Aviat Inst, Beijing, Peoples R China 显示增强组织信息的名称 [ 3 ] PLA Univ Sci & Technol, Nanjing, Jiangsu, Peoples R China 电子邮件地址:zeustone@yeah.net; jzd19851102@163.com; shilih@tom.com; gamit@163.comt; radarpeng@126.com 基金资助致谢 基金资助机构 授权号 National Natural Science Foundation of China 61301063 查看基金资助信息 出版商 PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND 类别 / 分类 研究方向:Geochemistry & Geophysics; Meteorology & Atmospheric Sciences Web of Science 类别:Geochemistry & Geophysics; Meteorology & Atmospheric Sciences 文献信息 文献类型:Article 语种:English 入藏号: WOS:000366789900006 ISSN: 1364-6826 eISSN: 1879-1824 期刊信息 Impact Factor (影响因子): Journal Citation Reports® 其他信息 IDS 号: CZ0JA Web of Science 核心合集中的 "引用的参考文献": 20 Web of Science 核心合集中的 "被引频次": 0 |
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