The results of a new photochemical model of Saturn's atmosphere are presented. This 1-D photochemical code includes hydrocarbons and oxygen compounds.
Vertical transport is driven by molecular and eddy diffusion.
External fluxes are also included. Photodissociation rates are determined using a radiative transfer treatment which takes multiple scattering into account. We compare the results to Voyager data, groundbased observations, and recent ISO data. Reproducing methane mole fraction observations gives constraints on its tropospheric mole fraction and eddy diffusion profile. External fluxes of oxygenated materials have been included.