A fast, semi-analytical model for the Venusian binary cloud system

ABSTRACT The Venusian clouds originate from the binary condensation of H2SO4 and H2O. two components strongly interact with each other via chemistry cloud formation. Previous works adopted sophisticated microphysical approaches to understand clouds. Here, we show that observed vapour distributions on Venus can be well explained by a semi-analytical model. Our model assumes local thermodynamical equilibrium for water but not sulphuric acid vapour, includes feedback acidity distributions. predicts strong supersaturation above 60 km, consistent our recent is 100 times faster than 1000 models. This allows us quickly explore large parameter space gas-cloud system. We found mass loading in upper has an opposite response lower mixing ratios atmosphere. transport influences all layers, while only dominates fast enough coupled climate models cloudy atmospheres Venus-like extra-solar planets.