The effect of the lower ionosphere on hydromagnetic modes in the plasmasphere

Details The effect of the lower ionosphere on hydromagnetic modes in the plasmasphere The effect of the lower ionosphere on hydromagnetic modes in the plasmasphere

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27..211c&link_type=abstract

Planetary and Space Science, vol. 27, Feb. 1979, p. 211-213.

Mathematics

1

Damping, Earth Magnetosphere, Lower Ionosphere, Magnetohydrodynamic Waves, Ionospheric Conductivity, Mathematical Models, Plasma Oscillations

Scientific paper

Dimensionless resonant frequencies of hydromagnetic modes have been calculated for a simple model plasmasphere including a lower ionosphere. Results for the Alfven mode are broadly consistent with those obtained by Hughes and Southwood (1976). It is further concluded that the lower ionosphere, despite its strong damping effect for part of the day, does not provide much dissipative coupling between adjacent magnetic field shells in the Alfven mode. The fast mode is found to be only slightly damped for horizontal wavelengths of global extent.

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