Abstract: The structure, composition and winds of the mesosphere and thermosphere of Venus are investigated using a nonlinear time-dependent hydrodynamic model. The assumption that all variables depend only on altitude and distance ...

Abstract: We consider the thermosphere of a nonrotating planet with a large-scale circulation from dayside to nightside driven by differential solar heating. Return flow is assumed to occur only below the region considered. The ...

Abstract: A general circulation model has been developed for the atmosphere above 97 km. It uses a 5° latitude ? 5° longitude grid and 24 vertical levels in increments of 0.5 scale height. The prognostic variables are horizontal ...

Abstract: The mean meridional circulation and latitudinal variation of temperature in the thermosphere are considered for equinox conditions. With regard to these parameters there have been serious discrepancies between observational ...

Abstract: The mean meridional circulation and latitudinal variation of temperature in the thermosphere are calculated for solstice conditions. The heat and momentum sources that drive the thermospheric circulation are solar EUV and ...

Abstract: Departures from a mean global-scale ionization distribution are commonly found in the ionospheric F region. Global-scale winds experience an acceleration where the ion drag is locally less than its global-scale smooth value ...