Physics
Scientific paper
Jan 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jastp..66...57s&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 66, Issue 1, p. 57-65.
Physics
3
Plasma Irregularities, Equatorial Spread F, Inertial Regime
Scientific paper
Plasma drift data from the AE-E satellite are spectrally analyzed to investigate the characteristics of the flow in the topside equatorial F region ionosphere during strong spread F conditions. Plasma flow around rapidly rising depletions is thought to exhibit behavior similar to two-dimensional Kolmogorov turbulence, but only on flux tubes with sufficiently small integrated ion-neutral collision frequencies. We find that one-dimensional spectra computed from vertical plasma drift measurements made in such depletions on such flux tubes tend to display a -5/3 spectral index over scale sizes from about 1 to 100km, suggesting the operation of an inverse energy cascade. This universal spectral form is evidence of an inertial regime of the underlying ionospheric interchange instability.
Hysell Dave L.
Shume E. B.
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