Clouds play an important role in tropospheric chemical processes and in the modulation of global climate via transport of reactive species from lower levels of the troposphere to higher altitudes and by modification of boundary layer gas and aerosol concentrations by aqueous phase reactions in cloud and precipitation. We present here the initial results of a study of the effects of deep convective clouds upon transport of aerosols and aerosol precursor gases along with a discussion of the formulation of the two-dimensional Eulerian model dynamics and two-moment bulk microphysics parametrization. Results from a test run using data from the Cooperative Convective and Precipitation Experiment show reasonable agreement with observations, although comparison with aircraft observations show the model cannot resolve saturated downdrafts. Comparison with the Taylor and Baker <1991> detrainment criterion shows good agreement for water vapor, a passive tracer, and cloud condensation nuclei. ¿ 1997 American Geophysical Union