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D region disturbances caused by electromagnetic pulses from lightningAttention 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.
Document ID
19930030962
Document Type
Reprint (Version printed in journal)
Authors
Rodriguez, Juan V. (NASA Headquarters Washington, DC United States)
Inan, Umran S. (NASA Headquarters Washington, DC United States)
Bell, Timothy F. (Stanford Univ. CA, United States)
Date Acquired
August 16, 2013
Publication Date
October 23, 1992
Publication Information
Publication: Geophysical Research Letters
Volume: 19
Issue: 20
ISSN: 0094-8276
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: N00014-82-K-0489
CONTRACT_GRANT: NAGW-2871
Distribution Limits
Public
Copyright
Other