A Numerical Study of the Air Flow Over Mountains Using the Two-Dimensional Version of the University of Virginia Mesoscale Model

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Abstract
The two-dimensional version of the University of Virginia mesoscale model has been adopted to study the air flow over a mountain using a terrain-following coordinate system. Some improvements in the boundary layer parameterization have been incorporated into the model according to a technique suggested by Dear-dorff. Two sets of experiments are studied. In the first one, the model is integrated to a steady-state solution under different initial velocity fields. In the second experiment, a diurnal temperature wave is imposed on the surface so that a pressure gradient is developed between the sloping terrain and the surrounding atmosphere. Results are compared against other mountain numerical models and against existing observations.

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