Aerosol‐induced mechanisms for cumulus congestus growth

摘要: Tropical convection has been observed to contain three cloud modes, the middle of which is cumulus congestus clouds. Congestus clouds act moisten tropical atmosphere, may be mixed-phase, and on occasion surpass freezing level inversion from where they develop into deeper convection. This study investigates impacts enhanced aerosol concentrations growth produced in idealized cloud-resolving model simulations run under a state radiative convective equilibrium (RCE). High-resolution, long-duration were completed using Regional Atmospheric Modeling System (RAMS). Aerosol between 2 4 km above ground varied clean polluted conditions order represent advection Saharan dust over Atlantic Ocean. The populations within each simulation are statistically analyzed 10 days output after reaches RCE. Results indicate that more produce greater amounts water ice mass, updraft strengths, an increase number tops extend level. Enhanced vapor depositional numerous, smaller droplets conditions, subsequent latent heat release warm phase regions cloud, found important factors invigoration these systems. feedbacks associated with cold pools condensate loading also influence strength opposition processes.