Lightning return stroke current models with specified channel-base current: a review and comparison

Compares five lightning return stroke current models that exhibit a simple relationship between the current at the return stroke channel-base and the current along the return stroke channel, namely the Bruce-Golde (BG) model, the transmission line (TL) model, the Master, Uman, Lin, and Standler (MULS) model, the Traveling Current Source (TCS) model, and the Modified Transmission Line (MTL) model, by assuming a common current wave shape at the channel base and then calculating the channel currents and charges and the resultant electric and magnetic fields. Two characteristics distinguish the models: the treatment of the return stroke wave front, and the spatial and temporal distribution of charge removed from the leader channel. The TL model is unrealistic for long-time field calculations owing to the fact that no net charge is removed from the channel. The other four models produce overall fields which are reasonable approximations to measured fields from natural lightning

Published in:
Journal of Geophysical Research, 95, D12, 20395-408
return stroke channel electric current;atmospherics;Bruce-Golde model;transmission line model;Master-Uman-Lin-Standler model;lightning EM fields;Travelling Current Source model;Modified Transmission Line model;electric fields;charge removal spatial distribution;close-range magnetic field hump;peak electric field derivative;electric current derivative;specified channel-base current;lightning return stroke current models;return stroke channel-base;current wave shape;magnetic fields;return stroke wave front;temporal distribution;leader channel;long-time field calculation;natural lightning;0 to 12 kA;0 to 10 mus;0 to 100 mus;0 to 7 km;0 to 45 muT;50 to 5000 m;

 Record created 2007-04-04, last modified 2019-03-31

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