The effect of non-uniform ionospheric conductivity on standing magnetospheric Alfven waves

Details The effect of non-uniform ionospheric conductivity on standing magnetospheric Alfven waves The effect of non-uniform ionospheric conductivity on standing magnetospheric Alfven waves

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986p%26ss...34.1213y&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 34, Dec. 1986, p. 1213-1221.

Physics

6

Earth Magnetosphere, Ionospheric Conductivity, Magnetohydrodynamic Waves, Standing Waves, Circular Polarization, Electric Fields, Magnetic Disturbances, Wave Equations

Scientific paper

Time-dependent normal-mode solutions to the Alfven wave equation in a uniform magnetic field, between planar ionospheres are examined. In particular, the effect of sharp gradients in ionospheric conductivity on the spatial and temporal structure of the waves is considered. It is shown that the electric field of the wave must always be perpendicular to any conductivity discontinuities present, and that this is achieved by the generation of circularly polarized Alfven waves at the discontinuity. The results are applied to an ionospheric strip of high conductivity, this being relevant to Pi2s.

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