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首页> 外文会议>2011 7th Asia-Pacific International Conference on Lightning >An Analysis of the Initial Breakdown Pulse for Positive Cloud-to-Ground Flashes
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An Analysis of the Initial Breakdown Pulse for Positive Cloud-to-Ground Flashes

机译：正向云对地闪光的初始击穿脉冲分析

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In order to further understand the initiating mechanism of positive cloud-to-ground (PCG) flashes, the nature and temporal characteristics of the positive breakdown pulse trains are investigated by electric field data in Conghua of Guangdong province.Considering the difference between the initial polarity of initial breakdown pulses and the first return stoke (RS), three types of bipolar pulse trains, including the same polarity, the opposite polarity and the both polarity, are identified. The percentages are 83.5%, 10% and 5.5%, respectively. The statistic results show that PCG flash with breakdown pulse trains, which occur when the amount of PCG flash is little, is about 11.6% of the total PCG flashes. The average time interval between the peak of adjacent pulses and pulse duration are 270.99 μs and 25.01 μs, respectively. The mean value of pulse train duration and the interval between PBP train and RS is 8.88 ms and 98.48ms, respectively. The average ratio of all samples between the maximum amplitude of pulse train and the amplitude of the first stroke pulse is 0.16. The ratio is smaller in of Guangzhou province than in Hokuriku coast in Japan.
机译：为了进一步了解正地对地（PCG）闪光的启动机制，利用广东省从化市的电场数据研究了正向击穿脉冲串的性质和时间特性。考虑了初始极性之间的差异根据初始击穿脉冲和第一返回冲程（RS），确定了三种类型的双极性脉冲序列，包括相同极性，相反极性和两种极性。百分比分别为83.5％，10％和5.5％。统计结果表明，当PCG闪光量很少时，带有击穿脉冲序列的PCG闪光约占PCG闪光总数的11.6％。相邻脉冲的峰值之间的平均时间间隔和脉冲持续时间分别为270.99μs和25.01μs。脉冲序列持续时间的平均值以及PBP序列和RS之间的间隔分别为8.88 ms和98.48ms。在脉冲序列的最大振幅和第一冲程脉冲的振幅之间的所有样本的平均比率为0.16。广州省的这一比例小于日本北陆沿岸的比例。

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