This session will explore recent progress in our understanding of the interactions between atmospheric aerosols and precipitation and their implications for the Earth's climate. We encourage contributions on the role of aerosols in the formation and evolution of water and ice clouds, on the impact of aerosols on cloud microphysical properties, and especially on the processes that lead to the formation of precipitation. Presentations that address the impact of clouds, precipitation and hydrological processes on the sources and burdens of atmospheric aerosols are also welcome. The session further encourages presentations on the implications of aerosol-cloud-precipitation interactions for climate and atmospheric chemistry. The presentations will include reports on field campaigns and laboratory studies, as well as theoretical investigations, microphysical, meso- and global- scale modeling studies.