Warm O(+) polar wind and the DE-1 polar cap electron density profile

Details Warm O(+) polar wind and the DE-1 polar cap electron density profile Warm O(+) polar wind and the DE-1 polar cap electron density profile

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.1715h&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 16, p. 1715-1717.

Physics

6

Electron Density (Concentration), Ion Charge, Ion Temperature, Oxygen Ions, Polar Caps, Atmospheric Chemistry, Density Distribution, Dynamics Explorer 1 Satellite, Positive Ions, Upper Atmosphere

Scientific paper

Theoretical steady state semikinetic polar wind density profiles, based on DE1/RIMS polar wind data (up to 3700 km), were obtained which agree very well with the power law electron density profile measured by the DE1/PWI for high altitudes. The polar wind is found to be O(+) dominated for the full altitude range considered (up to 8 R(E)). Multiple solutions are obtained for various combinations of base altitude ion temperatures and electron temperatures, such that the densities fit the Persoon et al. (1983) profile. For example, good fits to measured density profile are found for low base ion temperatures (5000 K) and high electron temperatures (9000 K), and also for unheated H(+) and O(+)(3000 K) with electron temperatures of 11,000 K. Below 2.8 R(E) the theoretical polar wind density deviates somewhat from the r exp -3.85 power law. It is concluded that this theoretical polar wind density profile, with a sum of base electron and ion temperatures of 14,000 K, yields a close match with the measured DE-1 electron density profile.

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