Abstract

The Regional Atmospheric Modeling System (RAMS) is a general purpose numerical code for simulating a wide variety of atmospheric flows. Versatility is one of the major goals in its design; the code is structured such that by setting a number of parameters to appropriate values from a large menu of options the model can be applied to nearly any flow situation. RAMS has been used to model flows at scales ranging from hemispheric circulations to submicroscale eddies induced by flow over buildings (e.g., Tremback et al. 1986; Cotton et al. 1988; Tripoli and Cotton 1989a,b; Schmidt and Cotton 1990; Cram et al. 1992a,b; Lee et al. 1993; Pielke et al. 1992). It contains a full complement of subgrid, microphysical, radiative, convective, and surface-layer parameterizations, along with a prognostic model for soil and vegetation temperature and moisture. Other options include two-way interactive grid nesting, terrain-following coordinates, several lateral and upper boundary conditions, and stretched vertical coordinates.

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