Physics
Scientific paper
Oct 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983georl..10..957k&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 10, Oct. 1983, p. 957-960. NASA-supported research.
Physics
16
Atmospheric Chemistry, Phosphines, Photochemical Reactions, Reaction Kinetics, Saturn Atmosphere, Organic Phosphorus Compounds, Photodissociation, Recombination Reactions, Temperature Profiles, Troposphere, Turbulent Diffusion, Saturn, Atmosphere, Photochemistry, Phosphine, Models, Concentrations, Depletion, Altitude, Troposphere, Formation, Chemistry, Hydrocarbons, Photodissociation, Production Rates, Observations, Density, Temperature, Data, Photolysis, Molecules
Scientific paper
The phosphine photochemistry on Saturn is studied with a 1D photochemical model. The PH3 concentration is rapidly depleted with height (scale height 3.5 km) in the upper troposphere. Formation of P, a probable precursor of P4, (a potential red chromophore in the atmosphere), is highly improbable unless the rate constant for the recombination reaction PH + H2 + M yields PH3 + M is less than 10 to the -41st cm exp 6/molecule-squared sec. Coupling of PH3 and hydrocarbon photochemistry, specifically the C2H2 catalyzed photodissociation of CH, is important. Column production rates of the organophosphorus compounds CH3PH2 and HCP of 3 x 10 to the 8th/sq cm sec are predicted, with potentially observable column densities of greater than 1 x 10 to the 17th/sq cm.
Kaye Jack A.
Strobel Darrell F.
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