Observation of nonlinear interactions in large-scale density enhancements of the high-latitude ionosphere

Details Observation of nonlinear interactions in large-scale density enhancements of the high-latitude ionosphere Observation of nonlinear interactions in large-scale density enhancements of the high-latitude ionosphere

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jgr...10422499m&link_type=abstract

Journal of Geophysical Research, Volume 104, Issue A10, p. 22499-22510

Physics

1

Radio Science: Nonlinear Phenomena, Ionosphere: Ionospheric Irregularities

Scientific paper

Simultaneous measurements of electron density and ELF electric field by the AUREOL-3 satellite have allowed Cerisier et al. [1985] to point out the existence of large-scale density irregularities in the high-latitude topside F region and to establish the role of the gradient drift instability in the plasma structuring. High-resolution spectra of the density and field fluctuations show the presence of low-frequency peaks linked by relationships such that fm+fn=fm+n. Bispectral analyses point out nonlinear interactions between waves at 7.8 and 15.6 Hz and density irregularities at 5.85 Hz. The consistency of the results with regard to instability models is discussed. The existence of an interaction process involving Schumann resonances is suggested.

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