CH4 and haze in Triton's lower atmosphere

Details CH4 and haze in Triton's lower atmosphere CH4 and haze in Triton's lower atmosphere

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9619241h&link_type=abstract

Journal of Geophysical Research Supplement (ISSN 0148-0227), vol. 96, Oct. 30, 1991, p. 19,241-19,252.

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16

Atmospheric Composition, Haze, Methane, Satellite Atmospheres, Triton, Extreme Ultraviolet Radiation, Lower Atmosphere, Planetary Atmospheres, Ultraviolet Spectrometers, Voyager 2 Spacecraft

Scientific paper

The structure of Triton's lower atmosphere is examined using Voyager 2 spectrometer occultation observations. The results reveal two constituents of the troposphere: CH4, and another absorber visible below 20 km altitude between 1400 and 1600 A. Although the density scale height and the wavelength dependence of the second absorber are consistent with Rayleigh scattering in N2, the inferred N2 column abundance is inconsistent with the Voyager radio occultation measurements. Because the optical depth of this absorber is wavelength dependent, the most attractive alternative hypothesis for its identity is aerosol haze. It is suggested that this absorber was formed as photochemical smog or as condensed N2 with a great abundance of nucleation centers.

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