The aerosol distribution in Uranus' atmosphere - Interpretation of the hydrogen spectrum

Details The aerosol distribution in Uranus' atmosphere - Interpretation of the hydrogen spectrum The aerosol distribution in Uranus' atmosphere - Interpretation of the hydrogen spectrum

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...207.1007t&link_type=abstract

Astrophysical Journal, vol. 207, Aug. 1, 1976, pt. 1, p. 1007-1024.

Other

15

Aerosols, Hydrogen, Planetary Atmospheres, Uranus (Planet), Abundance, Albedo, Atmospheric Composition, Atmospheric Models, Clouds, Gas Spectroscopy, Line Spectra, Methane

Scientific paper

New observations of Uranus' combined H2 spectrum have been obtained. An analysis, emphasizing the leverage provided by the S3(0) quadrupole line, leads to strong constraints on Uranus' bulk aerosol distribution with depth. Using an inhomogeneous model atmosphere program which includes Rayleigh scattering for gases and a 1 plus cos theta phase function for cloud layers, it is shown that Uranus' H2 spectrum implies a cloud layer (or dense aerosol) at a depth from 500 to 700 km-amagat H2. It also implies negligible aerosol scattering in the 280 to 450 km-amagat H2 region and a thin haze at 100 to 200 km-amagat H2 depths. The low albedo in very strong CH4 bands indicates that there is negligible aerosol scattering in Uranus' radiative zone. Hydrogen appears to be more abundant than the sum of all other atmospheric gases. The C/H ratio deep in Uranus' atmosphere is strongly enhanced over the solar value. Accurate limb-darkening measurements in and near strong CH4 bands would be effective in specifying Uranus' aerosol distribution in greater detail.

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