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DOI | 10.1002/2016JD025899 |
Characteristic pulse trains of preliminary breakdown in four isolated small thunderstorms | |
Ma, Dong | |
2017-03-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Using a low-frequency six-station local network, preliminary breakdown (PB) pulses not followed or followed by negative return stroke (RS), which are defined as PB-type and PB cloud-to-ground (PBCG)-type flashes, are analyzed based on four isolated small thunderstorms for the first time. On the basis of 22 PB-type flashes out of totally 2155 flashes, it indicates that the number of PB-type flashes is very small. At the early stage, PB-type flashes are observed in all four thunderstorms. At the active stage, PB-type flashes still can occur; meanwhile, there are few or no negative cloud-to-ground (CG) flashes. However, at the final stage no PB-type flashes occur. At the stage of distinct cell merging or splitting, PB-type flashes are also observed. Based on the 123 PBCG-type flashes, we discuss the percentage of PBCG-type flashes and also analyze the relationship between the electric field (E-field) amplitude of the largest pulse in the PB pulse train normalized to 100km (PBA), the E-field amplitude of the first return stroke normalized to 100km (RSA), the time interval between PBA and RSA (PB-RS interval), and the ratio between PBA and RSA (PB-RS ratio). We find that the percentage of PBCG-type flashes is not always dependent on PBA or PB-RS ratio; the type of thunderstorms may also have an impact on this percentage. None of the PB-RS intervals is less than 20ms; we speculate that such long PB-RS interval is the feature of isolated small thunderstorms, but more observations are needed to further investigate this question. |
英文关键词 | preliminary breakdown initial breakdown pulse train LPCC isolated small thunderstorm |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399655200012 |
WOS关键词 | INITIAL BREAKDOWN ; DISCHARGE PROCESSES ; LIGHTNING FLASHES ; INTRACLOUD ; CLOUD |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32424 |
专题 | 气候变化 |
作者单位 | Univ Sci & Technol China, Sch Earth & Space Sci, Hefei, Peoples R China |
推荐引用方式 GB/T 7714 | Ma, Dong. Characteristic pulse trains of preliminary breakdown in four isolated small thunderstorms[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(6). |
APA | Ma, Dong.(2017).Characteristic pulse trains of preliminary breakdown in four isolated small thunderstorms.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(6). |
MLA | Ma, Dong."Characteristic pulse trains of preliminary breakdown in four isolated small thunderstorms".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.6(2017). |
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