Observations of narrow bipolar events during two thunderstorms in Northeast China
Observations of narrow bipolar events during two thunderstorms in Northeast China
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中国东北地区两次雷暴期间窄双极事件的观测
DOI：
10.1007/s11430-012-4484-2
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发表时间：
2011-12
期刊：
影响因子：
--
通讯作者：
Ma Dong
中科院分区：
文献类型：
--
作者：
LÜ FanChao;Zhu baoyou;Ma Ming;Wei Lingxiang;Ma Dong
本文根据2010年夏季中国东北地区基于GPS的三站闪电到达时间（TOA）定位系统的数据，分析了两次雷暴期间发生的100多例窄双极事件（NBE）的特征。NBE均为正极性，VLF/LF起始脉冲振幅与回击相当。166个发生在150 km范围内的NBE的波形特征与其他报道的结果一致。双极脉冲的初始峰宽平均值为7.8±1.5 μs，半高全宽为4.6±1.0 μs，初始峰幅值与过冲峰的比值为2.1±0.6。推断的源高度NBE发生在两个雷暴平均9.6和7.4公里以上的平均海平面，而相应的虚拟电离层高度在两个不同的时间分别为89和78公里。在产生NBE的雷暴中，NBE倾向于在正常闪电的活跃阶段爆发，但它们之间没有确定的定量关系。在0711风暴中，NBE倾向于聚集在雷达反射率高的特定对流核附近，并且在雷暴发展过程中，NBE倾向于在这些产生NBE的对流核的前部区域一致地移动。
Here we report characteristics of more than 100 cases of Narrow Bipolar Events (NBEs) occurred during two thunderstorms on the basis of our analysis of the dataset collected by a GPS based three-station time of arrival (TOA) lightning location system deployed in Northeast China during the summer of 2010. All of the NBEs were of positive polarity and the amplitude of VLF/LF initial pulse of NBE was comparable to that of return strokes. The waveform characteristics of 166 NBEs that occurred within 150 km were consistent with the results of other reports. The average value of initial peak width of the bipolar pulse is 7.8±1.5 μs, full width at half maximum is 4.6±1.0 μs, and the ratio of initial peak amplitude to overshoot peak is 2.1±0.6. The inferred source height of NBEs occurred in two thunderstorms averaged 9.6 and 7.4 km above mean sea level, whereas the corresponding virtual ionosphere heights at two different times were 89 and 78 km, respectively. In NBE-producing thunderstorms, NBEs tended to burst during the active stage of normal lightning; nevertheless, no determinate quantitative relations could be established between them. In Storm 0711, NBEs were inclined to cluster at the proximity of particular convective cores with high radar reflectivity, and NBEs tended to move consistently at the front area of those NBE-producing convective cores during the evolution of thunderstorm.
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影响因子：
--
作者：
F. Han;S. Cummer
通讯作者：
F. Han;S. Cummer
影响因子：
2.8
作者：
Han, Feng;Cummer, Steven A.
通讯作者：
Cummer, Steven A.
影响因子：
5.2
作者：
Marshall, TC;Stolzenburg, M;Rison, W
通讯作者：
Rison, W
DOI：
10.1109/iclp.2012.6344211
发表时间：
2012-11
期刊：
2012 International Conference on Lightning Protection (ICLP)
影响因子：
--
作者：
W. Dong;Hengyi Liu
通讯作者：
W. Dong;Hengyi Liu
影响因子：
--
作者：
A. Jacobson
通讯作者：
A. Jacobson