Most meteorological models that simulate rain do not take a particulate emission inventory as input, as do chemistry-coupled meteorological models. Is there an improvement of rain prediction in the latter case? If meteorological models do not work with particle emissions injected into the atmosphere, do they assume some particles in atmosphere to predict rain?
If you are not going to study condensation and rain droplet formation processes in detail there is no need to know anything about aerosol for calculating rainfall rates or the amount of precipitation. You simply assume that there always are enough condensation nuclei present. In fact this is the case. So you only have to calculate the amount of water which has to fall out to reduce the supersaturation during an ascent of an airmass so that a relative humidity of 100 % is not exceeded. Of course you also have to take into account the amount of evaporation of the droplets if they are falling through layers of dry air.
If you are not going to study condensation and rain droplet formation processes in detail there is no need to know anything about aerosol for calculating rainfall rates or the amount of precipitation. You simply assume that there always are enough condensation nuclei present. In fact this is the case. So you only have to calculate the amount of water which has to fall out to reduce the supersaturation during an ascent of an airmass so that a relative humidity of 100 % is not exceeded. Of course you also have to take into account the amount of evaporation of the droplets if they are falling through layers of dry air.
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