Comparison of Narrow Bipolar Events with Ordinary Lightning as Proxies for Severe Convection
Comparison of Narrow Bipolar Events with Ordinary Lightning as Proxies for Severe Convection
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DOI：
10.1175/mwr2915.1
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发表时间：
2005-05
影响因子：
3.2
通讯作者：
A. Jacobson;M. J. Heavner
中科院分区：
文献类型：
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作者：
A. Jacobson;M. J. Heavner
摘要 窄双极事件（NBE）是最近研究的云内放电过程。据推测，NBE 是由高能宇宙射线的广泛大气簇射引发的。 NBE 在短时间内（大约 10 μs）导致带电云内的电荷分离显着弛豫。电流会产生独特的“双极”低频/甚低频信号辐射，该信号可以在地球上距离源头数千公里的位置记录下来。 NBE 之前/伴随的是任何类型闪电中最强大的甚高频无线电发射。这些强烈的脉冲无线电发射已被太空中的卫星无线电接收器定期检测到。由于其易于检测和识别，NBE 可能成为基于空间的全球近实时遥感的有用遥感代理。然而，为了实现这一潜力，必须证明 NBE 是相关的，就像普通闪电一样……
Abstract Narrow bipolar events (NBEs) are a recently studied intracloud electrical-discharge process. It is speculated that an NBE is instigated by the extensive atmospheric shower of an energetic cosmic ray. NBEs cause significant relaxation of the charge separation within the electrified cloud in a short time, on the order of 10 μs. The current flow causes radiation of a distinctive “bipolar” low-frequency/very low frequency signal that can be recorded at locations on earth up to thousands of kilometers from the source. NBEs are preceded/accompanied by the most powerful very high frequency radio emissions seen in any kind of lightning. These intense pulsed radio emissions have been routinely detected with satellite-borne radio receivers in space. Owing to their easy detection and recognition, NBEs might be a useful remote sensing proxy for space-based global, near–real time remote sensing. However, in order for that potential to be realized, NBEs must be shown to be associated, as is ordinary lightning,...