Altitude profile of the polar wind velocity and its relationship to ionospheric conditions

Details Altitude profile of the polar wind velocity and its relationship to ionospheric conditions Altitude profile of the polar wind velocity and its relationship to ionospheric conditions

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.2825a&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 24, p. 2825-2828

Physics

37

Earth Ionosphere, Electron Energy, Mathematical Models, Polar Regions, Wind Velocity, Geomagnetism, Light Ions, Particle Acceleration, Plasma Diffusion, Time Dependence

Scientific paper

We present Akebono observations of the polar wind velocity and the ambient electron temperature in the polar ionosphere. The velocity of the H(+) polar wind increases from about 1 km/s at 2000 km altitude to about 6 km/s at 4000 km altitude, and correlates with the local electron temperture at a given altitude. It is only weakly dependent on magnetic activity, but is generally more variable at active times. Our observation demonstrates the direct relationship between the local magnitude of ion acceleration and that of the ambipolar electric field responsible for the acceleration.

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