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Atmosphere 2017, 8(2), 29; doi:10.3390/atmos8020029

On the Possible Origin of Chaotic Pulse Trains in Lightning Flashes

1
Ångstrom Laboratory, Division of Electricity, Department of Engineering Sciences, Uppsala University, Box 534, Uppsala SE-75121, Sweden
2
Faculty of Electronics and Computer Engineering, Telecommunication Engineering, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, Durian Tunggal, Malacca 76100, Malaysia
3
Department of Physics, University of Colombo, Colombo 03, Sri Lanka
4
Faculty of Electric Engineering, Centre for power Electrical Engineering Studies, Universiti Teknologi Mara, Shah Alam, Selangor 40450, Malaysia
*
Authors to whom correspondence should be addressed.
Academic Editor: Robert Talbot
Received: 30 October 2016 / Revised: 29 January 2017 / Accepted: 30 January 2017 / Published: 5 February 2017
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Abstract

In this study, electromagnetic field radiation bursts known as chaotic pulse trains (CPTs) and regular pulse trains (RPTs) generated by lightning flashes were analyzed. Through a numerical analysis it was found that a typical CPT could be generated by superimposing several RPTs onto each other. It is suggested that the chaotic pulse trains are created by a superposition of several regular pulse trains. Since regular pulse trains are probably created by dart or dart-stepped leaders or K-changes inside the cloud, chaotic pulse trains are caused by the superposition of electric fields caused by more than one of these leaders or K-changes propagating simultaneously. The hypothesis is supported by the fact that one can find regular pulse trains either in the beginning, middle or later stages of chaotic pulse trains. View Full-Text
Keywords: regular pulse train; chaotic pulse train; numerical superposition; HF radiation regular pulse train; chaotic pulse train; numerical superposition; HF radiation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ismail, M.M.; Rahman, M.; Cooray, V.; Fernando, M.; Hettiarachchi, P.; Johari, D. On the Possible Origin of Chaotic Pulse Trains in Lightning Flashes. Atmosphere 2017, 8, 29.

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