Abstract
Abstract Stationary solutions in the presence of bottom topography are computed for a tropical atmospheric belt. A primitive divergent barotropic model is assumed. An iterative time-averaging method proposed by Edelmann (1972b) is used for the purpose of suppressing gravitational oscillations and synoptic transient perturbations. The spatial finite differencing scheme is analogous to the one adopted in the Mintz-Arakawa two-level general circulation model and documented by Gates et al. (1971). Time integration is performed with the leapfrog scheme using a time stop of 10 min. The initial state consists of realistic zonal flow and the initial geopotential height of the free surface is determined from the wind by assuming steady-state conditions. First. we obtain quasi-stationary solutions using an idealized mountain profile over a 36-day integration. The results are used to interpret stationary solutions in the case involving real African orography. When an idealized mountain profile is used, a quasi-stati...
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