High-latitude F region ionospheric interchange modes in the presence of powerful radio waves

Details High-latitude F region ionospheric interchange modes in the presence of powerful radio waves High-latitude F region ionospheric interchange modes in the presence of powerful radio waves

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.8559c&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A6, June 1, 1992, p. 8559-8568. Research supported by U.S. Navy a

Physics

3

Atmospheric Physics, Coupled Modes, F Region, Plasma Frequencies, Polar Regions, Radio Waves, Electromagnetic Radiation, Ionospheric Heating, Magnetohydrodynamic Stability

Scientific paper

The possibility is examined of influencing medium scale size interchange modes in the high-latitude F region ionosphere by a high-power, high-frequency (HF) electromagnetic ('pump') wave launched from the ground. The parametric coupling of interchange modes with the pump wave will occur near the critical layer where the pump frequency matches the local plasma frequency with the nonlinear Joule heating providing the dominant coupling mechanism. The parametric excitation (or suppression) of the interchange process at high latitudes is possible, in the local approximation, for short wavelengths using HF power densities that are attainable by current ionospheric heater facilities. These power density estimates for longer wavelength interchange modes are increased. The results are discussed in light of previous and possible future ionospheric heating experiments.

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