The Colorado State University Regional Atmospheric Modeling System (RAMS) is a comprehensive atmospheric model developed and maintained by the van den Heever group. RAMS can simulate phenomena from large-eddy simulation to regional climate scales, and has been used for simulations of supercell thunderstorms, mesoscale convective systems, cold pools, monsoon systems, sea breezes, extratropical cyclones, hurricanes, and more. RAMS contains both a bin-emulating bulk microphysics scheme and the Hebrew University Cloud Model (HUCM) bin microphysics scheme. The RAMS bin-emulating bulk microphysics scheme predicts the mixing ratio and number concentration of eight different hydrometeor classes and uses pre-calculated lookup tables for nucleation of aerosol. RAMS has a sophisticated treatment of aerosol including eleven different aerosol species. RAMS can simulate and track the emission, advection, nucleation, regeneration, and deposition (both wet and dry) of aerosols. Several radiative schemes are included in RAMS, and radiative-aerosol interactions can be turned on or off allowing for experiments to disentangle aerosol direct and indirect effects. RAMS is coupled to the KPP ocean mixed layer model and the LEAF-3 soil-vegetation-atmosphere transfer model allowing for two-way feedbacks between the atmosphere and surface. For more information about RAMS including source code and documentation, click below.