Generation of ELF/ULF waves in the ionosphere by dynamo processes

Details Generation of ELF/ULF waves in the ionosphere by dynamo processes Generation of ELF/ULF waves in the ionosphere by dynamo processes

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985georl..12..279p&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 12, May 1985, p. 279-282.

Physics

18

E Region, Extremely Low Frequencies, Extremely Low Radio Frequencies, Ionospheric Heating, Plasma-Electromagnetic Interaction, Radio Frequency Heating, Wave Excitation, Amplitude Modulation, Geomagnetic Micropulsations, Magnetic Fields, Plasma Heating

Scientific paper

It is shown that amplitude modulated HF heating in the ionospheric E-region can produce substantial power in the ELF/ULF range even in the absence of ambient ionospheric currents. The signals are associated with spontaneous generation of magnetic fields caused by the coupling of the hot-spot temperature gradient to the ambient ionospheric density gradient. The mechanism produces values for PCS micropulsations consistent with those observed by Stubbe and Kopka (1981).

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