A physical model of Titan's clouds

Details A physical model of Titan's clouds A physical model of Titan's clouds

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980icar...43..260t&link_type=abstract

Icarus, vol. 43, Sept. 1980, p. 260-282.

Physics

46

Atmospheric Chemistry, Atmospheric Models, Clouds (Meteorology), Photochemical Reactions, Satellite Atmospheres, Titan, Aerosols, Albedo, Atmospheric Pressure, Atmospheric Temperature, Optical Thickness, Particle Density (Concentration), Sensitivity, Solar Cycles, Turbulent Diffusion, Saturn, Satellites, Titan, Clouds, Models, Atmosphere, Parameters, Temperature, Depth, Aerosols, Optical Properties, Particles, Chemistry, Production Rates, Eddy Diffusion, Density, Structure, Calculations

Scientific paper

A physical model of the formation and growth of aerosols in the atmosphere of Titan has been constructed in light of the observed correlation between variations in Titan's albedo and the sunspot cycle. The model was developed to fit spectral observations of deep methane bands, pressures, temperature distributions, and cloud structure, and is based on a one-dimensional physical-chemical model developed to simulate the earth's stratospheric aerosol layer. Sensitivity tests reveal the model parameters to be relatively insensitive to particle shape but sensitive to particle density, with high particle densities requiring larger aerosol mass production rates to produce compatible clouds. Solution of the aerosol continuity equations for particles of sizes 13 A to about 3 microns indicates the importance of a warm upper atmosphere and a high-altitude mass injection layer, and the production of aerosols at very low aerosol optical depths. Limits are obtained for the chemical production of aerosol mass and the eddy diffusion coefficient, and it is found that an increase in mass input causes a decrease in mean particle size.

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