Electric field change of M component

Vayanganie, S. P. A.; Gunasekera, T. A. L. N.; Nanayakkara, Sankha; Fernando, Mahendra; Cooray, Vernon

doi:10.1109/iclp.2014.6973407

Cited by 2 publications

(2 citation statements)

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“…The measured electric fields from of M‐components consist of bipolar pulses in a scale of a few hundred microseconds and with superimposed chaotic pulses, clearly visible in the fields of the close station LSZ. These chaotic pulses appear to be consistent with the description of Vayanganie et al (2014). The microsecond‐scale electric field pulses preceding M‐component field changes have been attributed to the junction process (Rakov et al, 2001; Shao et al, 1995).…”

Section: Simulation Results and Comparison With Observed Datasupporting

confidence: 91%

“…M‐components are characterized by a transient increase in the current and the luminosity of lightning channels carrying a continuing current that follows some return strokes (Fisher et al, 1993; Malan & Collens, 1937; Thottappillil et al, 1995, Wang et al, 1999). Experimental data on M‐components are available from natural lightning (e.g., Campos et al, 2007; Shao et al, 1995; Stolzenburg et al, 2015; Vayanganie et al, 2014), instrumented towers (e.g., Azadifar et al, 2016; Flache et al, 2008; He, Azadifar, Li, et al, 2018; He, Azadifar, Rachidi, et al, 2018; Miki et al, 2005, 2006; Paul & Heidler , 2018; Pichler & Diendorfer, 2010; Visacro et al, 2013; Zhou et al, 2015), and triggered lightning (e.g., Qie et al, 2011; Rakov et al, 1995, 2001; Tran et al, 2013; Zhang et al, 2017). Only in the latter two cases (instrumented towers and triggered lightning) were the channel‐base currents measured simultaneously with the M‐component fields.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Measurement and Modeling of Both Distant and Close Electric Fields of an M‐Component in Rocket‐Triggered Lightning

Rachidi

Rubinstein

et al. 2020

JGR Atmospheres

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Simultaneous measurements of current and multiple-station electric fields associated with a 5.4-kA-peak M-component in rocket-triggered lightning are presented in this study. A close-range electric field measurement site was located northeast of the triggering site, 195°clockwise from South, at a distance of 78 m, while the distant multiple stations in this study were located southwest of the lightning triggering site (25-48°, clockwise from South) at a distance ranging from 69 to 126 km. Both the fast microsecond-scale and slow millisecond-scale pulses were observed at six distant stations. At the close station, the fast pulse was not noticeable. The magnitude and half-peak width of the fast pulse were in the range of 0.91-1.93 V/m and 2.0-3.0 μs, respectively. The corresponding parameters for the slow pulse were, respectively, in the range of 0.59-1.29 V/m and 20.0-25.1 μs. The time lag between the onset of the channel-base current and the far electric field of the M-component was 18 μs. This time lag was used to deduce the ratio of the M-component channel length and the wave speed. The classical guided wave M-component model proposed by Rakov et al. (1995, https://doi.org/10.1029/95JD01924) to simulate the slow, millisecond-scale field pulse assumes that neither the incident nor the reflected current wave undergoes attenuation even though the wave propagation occurs along a lossy channel. A modified guided wave M-component model is proposed in this study in which the M-component current wave attenuates with an exponential decay. Based on the best agreement achieved between the simulated fields using the modified two-wave M-component model and the observed near and far electric fields, the channel length, the M-component wave speed, and the current attenuation constant were inferred, respectively, as 1.8 km, 1 × 10 8 m/s, and 3 km. It is shown that the modified guided wave M-component model is able to reproduce reasonably well the electric fields both at close and far distance ranges.

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Section: Simulation Results and Comparison With Observed Datasupporting

confidence: 91%