Clouds and Chemistry Chemistry in and around thunderstorms Weather Research Forecast Model coupled with aqueous chemistry (WRF-AqChem). Simulations of observed case studies help to evaluate model results and to analyze the effect of thunderstorms on ozone precursors. Intercomparison of convective-scale cloud chemistry models in simulating tracer transport in deep convection. This exercise has provided an assessment of how different cloud chemistry models simulate the same case. Planning of the Deep Convective Clouds and Chemistry (DC3) field campaign. Effects of boundary layer dynamics and physics on chemical reactivity. Large-eddy simulations of shallow cumulus clouds in the convective boundary layer are being conducted. Other research range from global scale simulations of sulfate aerosols to cloud parcel model simulations of gas and aqueous chemistry.