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The effects of turbulence on the microphysics of mixed‐phase deep convective clouds investigated with a 2‐D cloud model with spectral bin microphysics

Multiple recent studies investigate the effects of turbulence on collisions of cloud droplets. It was shown that turbulence typical of cumulus clouds increases the collision rate between cloud droplets several times. The turbulent‐induced collision enhancement decreases the time and the height of raindrops formation. In the present study, the potential effect of turbulence on the microstructure of mixed‐phase deep convective clouds is investigated. Effects of turbulence‐induced enhancement of the collision rate between ice particles as well as between ice particles and water drops are investigated by means of the Hebrew University Cloud model with spectral bin microphysics. Simulations of isolated deep convective mixed‐phase clouds were performed under different aerosol conditions. It is shown that turbulence may have a substantial impact on the microphysical structure of mixed‐phase convective clouds. At the same time, turbulence impact on accumulated rain amount from a single cloud is not very significant.