| Charge structures and cloud-to-ground lightning discharges characteristics in two supercell thunderstorms |
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| 作者姓名： | ZHANG Yijun MENG Qing LU Weitao Paul Krehbiel LIU Xinsheng ZhOU Xiuji |
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| 作者单位： | [1]Chinese Academy of Meteorological Sciences, Beijing 100081, China [2]New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801, USA [3]Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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| 基金项目： | This work was supported by the National Natural Science Foundation of China （Grant No. 40475002） and the Ministry of Science and Technology of China （Grant No. 2003BA904B 10）. |
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| 摘 要： | The characteristics of CG lightning discharges have been studied because they often result in the disaster and are easier to be observed than intracloud discharge. In early stage, the locations of charges in cloud are de- termined based on the multi-stati…
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| 关 键 词： | 雷暴 电荷结构 云地闪电 放电特征 |
| 收稿时间： | 2005-05-23 |
| 修稿时间： | 2005-05-232005-07-25 |
Charge structures and cloud-to-ground lightning discharges characteristics in two supercell thunderstorms |
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| ZHANG Yijun MENG Qing LU Weitao Paul Krehbiel LIU Xinsheng ZhOU Xiuji.Charge structures and cloud-to-ground lightning discharges characteristics in two supercell thunderstorms[J].Chinese Science Bulletin,2006,51(2):198-212. |
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| Authors: | Yijun Zhang Qing Meng Weitao Lu Krehbiel Paul Xinsheng Liu Xiuji Zhou |
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| Institution: | (1) Chinese Academy of Meteorological Sciences, Beijing, 100081, China;(2) New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801, USA;(3) Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China |
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| Abstract: | The charge structures and temporal and spatial characteristics of cloud-to-ground (CG) light- ning discharges in two supercell thunderstorms have been analyzed based on the data of three-dimen- sional VHF radiation sources with high time and space resolution produced by lightning discharges. The results indicate that the charge structures in main part (convective region) of the thunderstorms were inverted tripole while a number of positive CG lightning discharges were occurring in the two thun- derstorms. The positive CG lightning discharges oc- curred in main part of the thunderstorms and origi- nated from the positive charge region located at the middle part of the thunderstorms. While a number of negative CG lightning discharges were occurring, the negative CG lightning discharges occurred in the anvil of the thunderstorm. The charge structure is inverted dipole in the region due to the slant of charge structure in main region toward anvil region. The negative charge region located at the upper part of anvil produced a lot of negative CG lightning dis- charges. No or less CG lighting was produced di- rectly by the charge region located at the lower part of the thunderstorm. The charge region in lower part of the thunderstorm plays an important role for the occurrence of CG lightning from charge region above it. |
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| Keywords: | supercell thunderstorm charge structure CG light- ning |
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