Sferic clusters associated with early/Fast VLF events
Sferic clusters associated with early/Fast VLF events
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与早期/快速 VLF 事件相关的 Sferic 星团
DOI：
10.1029/1999gl010757
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发表时间：
2000
影响因子：
5.2
通讯作者：
U. Inan
中科院分区：
文献类型：
--
作者：
M. P. Johnson;U. Inan
被称为“早期/快速”甚低频事件的特征亚电离层信号扰动被发现始终与同时发生的不寻常的集群的无线电大气中观察到的宽带甚低频数据。在早期/快速事件发生时或之前，会发生一次爆发性的天团活动，持续时间从几百毫秒到几秒钟。团簇能量随距离衰减的速度比云地（CG）闪电更快，这表明这些团簇可能是由云内（IC）闪电产生的，因此云内的电荷运动可能在早期/快速VLF事件的成因机制中发挥作用。
Characteristic subionospheric signal perturbations referred to as ‘early/fast’ VLF events are found to consistently be associated with the simultaneous occurrence of unusual clusters of radio atmospherics as observed in wideband VLF data. A burst of sferic activity occurs at or before the onset of the early/fast events and lasts from several hundred milliseconds to several seconds. The cluster energy attenuates with distance more rapidly than cloud‐to‐ground (CG) lightning, suggesting that these clusters may be produced by intracloud (IC) lightning, and that the charge movement within the cloud may thus play a role in the causative mechanism of early/fast VLF events.