Numerical modelling of the thermosphere-ionosphere-protonosphere system

Details Numerical modelling of the thermosphere-ionosphere-protonosphere system Numerical modelling of the thermosphere-ionosphere-protonosphere system

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jatp...53.1113n&link_type=abstract

(Solar-terrestrial physics; International SCOSTEP Symposium, 7th, The Hague, Netherlands, June 25-30, 1990, Selected Papers. A92

Physics

34

Earth Magnetosphere, Ion Concentration, Ionospheric Electron Density, Proton Belts, Thermosphere, Electron Energy, Equinoxes, Geomagnetism, Hydrodynamic Equations, Light Ions, Neutral Atmospheres

Scientific paper

This study presents the results of a numerical calculation of the thermospheric circulation, the ion and electron concentrations, and temperatures as well as electric fields of magnetospheric and dynamo origin for a solar minimum, low geomagnetic activity, and spring (equinox) conditions. The findings are obtained from a numerical hydrodynamical model of the earth's ionosphere and protonosphere for the height range from 80 km to a geocentric distance of 15 RE. The concentrations and temperature of the neutral atmopshere are computed from the MSIS-83 empirical mode of the thermosphere. The effects of small electric fields on the global distributions of the thermospheric calculation, concentrations, and temperatures of the charged particles in the ionosphere and protonosphere are discussed. It is shown that electric fields smaller than even 20 mV/m form all the main structures of the global plasma distribution at F-region altitudes and in the protonosphere, such as the main ionosphere trough, light ion trough, the plasmapause, and the 'hot spots' in the ion and electron temperature distributions.

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