Spatiotemporal characteristics of positive cloud-to-ground lightning discharges and bidirectional leader of the lightning
文献类型：期刊论文
| 作者 | Zhang, YJ; Meng, Q; Paul, K; Liu, XS; Yan, MH; Zhou, XJ |
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 2006-02-01 |
| 卷号 | 49期号:2页码:212-224 |
| 关键词 | positive CG lightning radiation characteristics bidirectional leader |
| ISSN号 | 1006-9313 |
| DOI | 10.1007/s11430-005-0054-1 |
| 通讯作者 | Zhang, YJ(zhangyj@cams.cma.gov.cn) |
| 英文摘要 | The three-dimension spatiotemporal development characteristics of positive cloud-to-ground (CG) lightning discharges have been analyzed by using the data measured by the lightning mapping array system with high time and space resolution. The results indicate that a positive CG lightning discharge can be divided into three stages based on the characteristics of its development. The first stage is discharge process in cloud with a long duration preceding the return stroke. This process with an average of 370 ms propagated at velocity of 10(5) m/s and produced intensive radiation with a magnitude equal to that of the negative leader. During this stage, the lightning channels developed horizontally in the positive charge region with few branches as the negative polarity breakdown. During the stage after the return stroke of the positive CG lightning, the lightning channels propagated at velocity of 2 times faster than that before the return stroke. This stage involved lots of positive fast impulses and corresponded to the continuing current process producing less and dispersed radiation points and more intensive radiation powers. During the final stage of the positive CG lightning, the lightning channels developed at velocity equal to that before the return stroke and the radiation points appeared mainly at the ends of channel. The spatiotemporal development characteristics of the positive CG lightning are very different from that of the negative CG lightning. All of the radiation points of the positive CG lightning appeared in the positive charge region of cloud. Little or no radiation was detected during the positive leader just before the return stroke. The duration of the positive CG lightning was an average of 730 ms. The positive CG lightning discharges with lasting time of 500-600 ms were 43%. 90% of the positive CG lightning discharges involved one return stroke, the most return stroke number being four. The current of the return stroke was an average of 36.5 kA with maximum and minimum values of 70 kA and 11.5 kA respectively. 40% of the return stroke currents were more than 40 kA. |
| 收录类别 | SCI |
| WOS关键词 | FLASHES ; INTRACLOUD |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000236156400010 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2555745 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Zhang, YJ |
| 作者单位 | 1.Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China 2.New Mexico Inst Min & Technol, Socorro, NM 87801 USA 3.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, YJ,Meng, Q,Paul, K,et al. Spatiotemporal characteristics of positive cloud-to-ground lightning discharges and bidirectional leader of the lightning[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2006,49(2):212-224. |
| APA | Zhang, YJ,Meng, Q,Paul, K,Liu, XS,Yan, MH,&Zhou, XJ.(2006).Spatiotemporal characteristics of positive cloud-to-ground lightning discharges and bidirectional leader of the lightning.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,49(2),212-224. |
| MLA | Zhang, YJ,et al."Spatiotemporal characteristics of positive cloud-to-ground lightning discharges and bidirectional leader of the lightning".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 49.2(2006):212-224. |
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来源：寒区旱区环境与工程研究所
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