How do the strongest radio pulses from thunderstorms relate to lightning flashes
How do the strongest radio pulses from thunderstorms relate to lightning flashes
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DOI：
10.1029/2003jd003936
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发表时间：
2003-12
影响因子：
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通讯作者：
A. Jacobson
中科院分区：
文献类型：
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作者：
A. Jacobson
[1]我们提出了一个统计分析的雷暴无线电频率和光学数据从FORTE卫星研究强射频脉冲发射的关系，更传统的信号从闪电。这项研究是建立在一个FORTE数据库的云内脉冲无线电信号的风暴，其地理位置提供的巧合与FORTE光学成像仪或巧合与地面闪电探测阵列。我们统计表明，在FORTE低频段，峰值功率>40 kW的云内无线电发射（26-48 MHz）与较弱的发射相比具有独特的特征，包括：孤立发生或在先导进展开始时发生，但从不在进展中的先导内发生;发生时没有FORTE可检测到的光发射;有时与电荷的快速（10 μs）弛豫有关;在先导启动的情况下，随后是向上前进的先导。这些强的云内无线电脉冲似乎与云内放电过程有关，该过程在物理上不同于传统的先导进展。
[1] We present a statistical analysis of thunderstorm radio frequency and optical data from the FORTE satellite to examine the relationship of strong radio frequency pulsed emissions to more conventional signals from lightning. The study is built on a FORTE database of intracloud pulsed radio signals from storms whose geolocation is provided either by coincidence with the FORTE optical imager or by coincidence with ground-based lightning-detection arrays. We show statistically that intracloud radio emissions with peak power >40 kW in the FORTE low band (26–48 MHz) have unique characteristics compared to weaker emissions, including: occurring either in isolation or at the start of leader progression but never within a progressing leader; occurring without light emission detectable by FORTE; sometimes occurring in association with a rapid (10 μs) relaxation of the electric charge; and being followed by an upward progressing leader in the cases where a leader is initiated. These strong intracloud radio pulses appear to be associated with an intracloud discharge process that is physically distinct from conventional leader progression.