A New Regional Climate Modeling Framework to Examine

A New Regional Climate Modeling Framework to Examine Aerosol Effects on Convective Clouds Objective Rain gauge Improved model ● Improve the ability to simulate aerosolcloud interactions in convective clouds using a cumulus parameterization with cloud microphysics ● Examine aerosol indirect effects on summer monsoon over East Asia using the new modeling framework Approach ● Link aerosols with cloud droplet nucleation and ice nucleation processes in a cumulus parameterization with cloud microphysics ● Conduct regional climate simulations with the improved parameterization to understand how clouds and precipitation associated with the East Asia summer are influenced by pollution aerosols The improved model simulates precipitation very well. Impact ● The updated cumulus parameterization improves the simulation of precipitation and radiative properties of convective clouds ● Results show that aerosols reduce precipitation and cloud fraction by suppressing convection ● Improved understanding of aerosol impacts on regional climate and provided guidance on future development in regional and global climate models. Lim, K-S, J Fan, LR Leung, P-L Ma, B Singh, C Zhao, Y Zhang, G Zhang, and X Song. 2014. “Investigation of Aerosol Indirect Effects Using a Cumulus Microphysics Parameterization in a Regional Climate Model. ” Journal of Geophysical Research: Atmosphere, early online. DOI: 10. 1002/2013 JD 020958.