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Generation of ELF/ULF waves in the ionosphere by dynamo processes
Author(s) -
Papadopoulos K.,
Chang C. L.
Publication year - 1985
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl012i005p00279
Subject(s) - dynamo , ionosphere , geophysics , magnetosphere , geology , physics , extremely low frequency , magnetic field , plasma , nuclear physics , quantum mechanics
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 (Vn × VT). The mechanism produces values for PC5 micropulsations consistent with those observed by Stubbe and Kopka (1981).