Abstract
The characteristics of initial leader of triggered lightning flashes are studied by use of a high-speed digital camera system with the rate of 1 000 frame per second and simultaneous measurements of current and electric field change with 0.1 μs time resolution. The results show that the altitude-triggered lightning was initiated by bidirectional propagation leader because of “current interruption” by air gap, whereas the grounded-triggered one was not. The onset of downward-moving positive leader was prior to that of the upward-going negative leader for 843 ms in an altitude-triggered lightning under the positive ambient electric field. The downward-moving leader, regardless of its polarity, would produce inhomogeneous distribution of luminosity (current) along the channel on the moment of connection to the ground.
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References
Schonland, B. F. J., Progressive lightning (IV),Proc. R. Soc. London, Ser. A, 1938, 164: 132.
Kasemir, H. W., A contribution to the electrostatic theory of a lightning discharge,J. Geophys. Res., 1960, 65: 1873.
Kasemir, H. W., Static discharge and triggered lightning,in Proceedings of 8th International Aerospace and Ground Conference on Lightning and Static Electricity, Foot worth, Tex., Fune 21–23, DOT/FAA/CT-83/25, 1983, 24. 1–24.11.
Mazur, V., Ruhnke, L. H., Common physical processes in natural and artificially triggered lightning,J. Geophys. Res., 1993, 98: 12913.
Uman, M. A., Rakov, V. A., Rambo, K. J.et al., Triggered lightning experiments at Camp Blinding, Florida (1993–1995),T. IEE. Japan, 1997, 117B: 446.
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Wang, C., Yan, M., Liu, X. et al. Bidirectional propagation of lightning leader. Chin. Sci. Bull. 44, 163–166 (1999). https://doi.org/10.1007/BF02884743
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DOI: https://doi.org/10.1007/BF02884743