Raman scattering in the atmospheres of giant planets and optical properties of atmospheric aerosol

Details Raman scattering in the atmospheres of giant planets and optical properties of atmospheric aerosol Raman scattering in the atmospheres of giant planets and optical properties of atmospheric aerosol

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997kfnt...13d..22m&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, vol. 13, p. 22

Physics

Optics

Gas Giant Planets, Planetary Atmospheres, Atmospheric Optics, Aerosols, Atmospheric Scattering, Raman Spectra, Optical Properties, Saturn Atmosphere, Neptune Atmosphere

Scientific paper

We analyze the Raman scattering effects in the atmospheres of giant planets and demonstrate that the observed geometric albedo for wavelengths corresponding to Fraunhofer lines and their 'ghosts' may be used for estimating probable values of the ratios of the aerosol and gas optical thicknesses (tau-alpha/tau-R) as well as the ratios of the absorbing and scattering components in the aerosol optical thickness (tau-k/tau-R). The ratios tau-alpha/tau-R obtained for the Jupiter (20 +/- 3) and Saturn (15 +/- 2) atmospheres agree well with the estimates derived from the analysis of methane absorption band intensity distributions over the planetary disks. Since there is scarce information on probable values of the phase function for Uranus and Neptune, we got probable limits for the ratios: 1.35-20.3 for Uranus and 1.61-24.6 for Neptune. Besides, the ratio of the absorbing and scattering components in the aerosol optical thickness decreases to larger wavelengths in the range 358-397 nm for Jupiter, Saturn, and Uranus, while such dependence is very likely to be absent for Neptune. The observed ratios are different for the four planets, and this can be partially attributed to the uncertainty in the choice of the phase function.

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