A Note on Aerosol Processing by Droplet Collision‐Coalescence

The processing of aerosol by droplet collision-coalescence is analyzed in three-dimensional simulations drizzling stratocumulus using a Lagrangian cloud model for the representation and microphysics. Collision-coalescence shown to create characteristic bimodality size distribution. We show that large-scale dynamics stratocumulus-topped boundary layer are key understanding amount time available processing. enable particles repeat cycle condensation, collision-coalescence, evaporation, which causes steady increase size. This process continued until grows so large growth substantially accelerated multiple collisions occur within one cycle, forming precipitation-sized droplets lost surface, including aerosol. An analytical relationship derived captures fundamental shape processed