Light ion velocities in the polar ionosphere

Details Light ion velocities in the polar ionosphere Light ion velocities in the polar ionosphere

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.6957m&link_type=abstract

Journal of Geophysical Research, vol. 86, Aug. 1, 1981, p. 6957-6959.

Physics

3

Earth Ionosphere, Flow Velocity, Ion Motion, Light Ions, Magnetic Fields, Polar Regions, Electron Energy, Geomagnetism, Lines Of Force, Temperature Profiles, Thermal Diffusion

Scientific paper

High-speed flow of light ions along magnetic field lines is not simply a consequence of those field lines having an open topology. It is pointed out that the magnitude of the H(+) flow velocity in the polar wind is not predicted by theoretical models, but rather is imposed as a boundary condition. Thermal diffusion, the electron temperature profile, and a diverging magnetic field can be shown to have important effects on the H(+) flow velocity, which need not be supersonic even when the pressure at large distances from the earth is low.

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