D region disturbances caused by electromagnetic pulses from lightning

Details D region disturbances caused by electromagnetic pulses from lightning D region disturbances caused by electromagnetic pulses from lightning

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.2067r&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 20, p. 2067-2070.

Physics

19

Atmospheric Ionization, D Region, Electromagnetic Pulses, Ionospheric Heating, Lightning, Electron Energy, Ionospheric Electron Density

Scientific paper

Attention is given to a simple formulation of the propagation and absorption in a magnetized collisional plasma of EM pulses from lightning which describes the effect of discharge orientation and radiated electric field on the structure and magnitude of heating and secondary ionization in the D region. Radiation from most lightning discharges can heat substantially, but only the most intense (not less than 20 V/m) are likely to cause ionization enhancements not less than 10 percent of the ambient in a single ionization cycle. This dependence on the radiated electric field is modified by the discharge radiation pattern: a horizontal cloud discharge tends to cause larger heating and ionizaton maxima while a vertical return stroke causes disturbances of a larger horizontal extent.

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