Lightning-related fields in the ionosphere

Details Lightning-related fields in the ionosphere Lightning-related fields in the ionosphere

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988georl..15..764b&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 15, Aug. 1988, p. 764-767. Research supported by Auburn University.

Physics

16

Atmospheric Electricity, Electric Fields, Ionospheric Disturbances, Lightning, Charge Distribution, Current Density, Maxwell Equation, Transient Response

Scientific paper

Lightning-related transient electric fields and conduction current densities due to the redistribution of charge by the return stroke, but not directly associated with the high-intensity current channel, are investigated via a simulation of Maxwell's equations. The investigation presents evidence to suggest that the lightning-related charge redistribution and subsequent relaxation, rather than the high intensity current, is the source of the major component of the transient field and energy coupled to the ionosphere. A time domain finite element analysis is employed in the simulation, using a conductivity profile obtained simultaneously with electric field measurements which agree, in general terms, with the simulations. It is concluded that prior depictions of these phenomena underestimate the fraction of the total energy that couples to and dissipates within the ionosphere and magnetosphere.

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