A global model of thermospheric dynamics. II - Wind, density, and temperature fields generated by EUV heating

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Atmospheric Density, Atmospheric Heating, Atmospheric Models, Atmospheric Temperature, Solar Radiation, Thermosphere, Wind Profiles, Atmospheric Attenuation, Density Distribution, Diurnal Variations, Far Ultraviolet Radiation, Incident Radiation, Temperature Distribution, Upper Atmosphere

Scientific paper

This paper discusses the extension of the numerical model of the earth's upper atmosphere described by Creekmore et al. (1975) to treat global wind, density and temperature fields generated by absorption of solar extreme ultraviolet (EUV) radiation. The equations of mass, momentum and energy conservation are solved in a spherical shell between the altitudes of 120 and 500 km. Comparisons of the calculated wind, density and temperature fields with those resulting from previous theoretical and observational studies are made. The phases of the density and temperature fields agree quite well with those given by empirical models. However, further comparisons indicate the necessity of a heat source at high latitudes, even during geomagnetically quiet times.

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