Types of lightning discharges that abruptly terminate enhanced fluxes of energetic radiation and particles observed at ground level
Types of lightning discharges that abruptly terminate enhanced fluxes of energetic radiation and particles observed at ground level
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突然终止地面观察到的高能辐射和粒子增强通量的闪电放电类型
DOI：
10.1002/2017jd026744
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
S. Soghomonyan
中科院分区：
文献类型：
--
作者：
A. Chilingarian;Y. Khanikyants;E. Mareev;D. Pokhsraryan;V. Rakov;S. Soghomonyan
我们提出了与雷暴相关的高能辐射通量和被闪电放电突然终止的粒子通量增强的地面测量。所有测量均在海拔 3200 米的阿拉加茨山（亚美尼亚）进行。使用有效频率带宽为 50 Hz 至 12 MHz 的宽带电场测量系统和五个电场磨网络记录闪电特征，其中三个安装在阿拉加茨站，一个安装在诺安伯德站（距离阿拉加茨 12.8 公里），一个安装在埃里温站（距离阿拉加茨 39 公里）。我们观察到，通量增强终止仅与靠近（粒子探测器 10 公里左右）负 CG 和正常极性 IC 相关；也就是说，闪电类型会减少云层下方向上的电场，从而抑制电子向地面的加速。
We present ground‐based measurements of thunderstorm‐related enhancements of fluxes of energetic radiation and particles that are abruptly terminated by lightning discharges. All measurements were performed at an altitude of 3200 m above sea level on Mount Aragats (Armenia). Lightning signatures were recorded using a wideband electric field measuring system with a useful frequency bandwidth of 50 Hz to 12 MHz and network of five electric field mills, three of which were installed at the Aragats station, one at the Nor Amberd station (12.8 km from Aragats), and one at the Yerevan station (39 km from Aragats). We observed that the flux‐enhancement termination was associated only with close (within 10 km or so of the particle detector) negative CGs and normal‐polarity ICs; that is, with lightning types which reduce the upward directed electric field below the cloud and hence suppress the acceleration of electrons toward the ground.