The global wind system in the thermosphere.

The upper atmosphere wind distribution is calculated by solving the Navier-Stokes equations with models of upper atmospheric densities and ion distribution. All non-linear terms and viscous terms are included. It is found that the velocities from the non-linear solutions are smaller than those obtained from a linear treatment and that in the equatorial region the magnitude of the average meridional velocity is strongly dependent upon the latitudinal coupling. No appreciable super-rotation is obtained by the inclusion of the nonlinear terms; the small value of the average zonal velocity is mainly due to the ion distribution.