Drift wave instability in the Io plasma torus

Details Drift wave instability in the Io plasma torus Drift wave instability in the Io plasma torus

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9614075h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Aug. 1, 1991, p. 14,075-14,083.

Physics

16

Io, Ionospheric Drift, Jupiter Atmosphere, Plasma Drift, Toroidal Plasmas, Boundary Value Problems, Planetary Ionospheres, Standing Waves, Wave Dispersion, Wave Equations

Scientific paper

A linear normal mode analysis of the drift wave instability in the Io plasma torus was carried out on the basis of the Richmond (1973) and Huang et al. (1990) analyses of drift waves in the vicinity of the earth's plasmapause. Results indicate that the outer torus boundary is linearly unstable to the growth of electrostatic drift waves. It is shown that the linear growth rate is proportional to the ion drift frequency and to the ratio of the flux tube charge content to the Jovian ionospheric Pedersen conductance. It is also shown that various theoretical models of global radial transport in Jupiter's atmosphere (including corotating convection, interchange diffusion, and transient flux tube convection) can be understood as plausible nonlinear evolutions of electrostatic drift waves.

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