Titan aerosols - Optical properties and vertical distribution

Details Titan aerosols - Optical properties and vertical distribution Titan aerosols - Optical properties and vertical distribution

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980icar...41..119r&link_type=abstract

Icarus, vol. 41, Jan. 1980, p. 119-130. NASA-supported research.

Physics

Optics

25

Aerosols, Atmospheric Composition, Atmospheric Optics, Infrared Astronomy, Planetary Atmospheres, Titan, Albedo, Brightness, Methane, Particle Size Distribution, Physical Properties, Vertical Distribution, Saturn, Satellites, Aerosols, Optical Properties, Analysis, Wavelengths, Albedo, Refractive Index, Particle Size, Layers, Atmosphere, Models, Methane, Spectrum, Light (Visible Radiation), Infrared, Geometry, Bands, Density, Data, Distribution, Mixing, Pressure, Ultraviolet, Absorption

Scientific paper

An analysis of Titan's solar phase variation as a function of wavelength together with the continuum geometric albedo makes it possible to set limits on the real part of the refractive index and on the average particle size of the aerosol component of Titan's atmosphere of between about 1.5 and 2.0 and between 0.20 microns and about 0.35 microns, respectively. If the real part of the refractive index is known the average particle size can be determined to within a few percent, and varies inversely with the real part of the refractive index. Using this information in a two-layer model of a methane-aerosol atmosphere and comparing the result with Titan's visible and near-infrared methane spectrum leads to the conclusion that the top layer of Titan's atmosphere contains 0.01 km atm of methane and 2.5 extinction optical depths of aerosol, while the data are consistent with a bottom layer containing 2.2 km atm of methane and about 7.5 aerosol optical depths for a real part of the refractive index equal to 1.7 and an average particle size of 0.25 microns.

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