Physics
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9618961b&link_type=abstract
Journal of Geophysical Research Supplement (ISSN 0148-0227), vol. 96, Oct. 30, 1991, p. 18,961-18,975. Research supported by INS
Physics
36
Atmospheric Chemistry, Atmospheric Composition, Hydrocarbons, Infrared Spectroscopy, Neptune Atmosphere, Voyager 2 Spacecraft, Abundance, Atmospheric Models, Photolysis, Spectral Bands
Scientific paper
The ethane and acetylene emissions observed in the Voyager IR spectra of Neptune are analyzed. The mean hydrocarbon abundances are derived from a comparison of the disk-averaged spectral selection with synthetic spectra, using updated temperature information from the Voyager 2 radio occultation data and constraints from the ground-based stellar occultation measurements. The observations are used to test photochemical models generated for various eddy mixing profiles and stratospheric methane mole fractions. Finally, the altitudinal variability of the acetylene emission strength was investigated from a large set of IRIS spectra, and the derived variation is compared with that observed at lower wavenumbers (250 and 350 per cm) where the troposphere and the lower stratosphere are probed.
Bezard Bruno
Conrath Barney J.
Maguire William C.
Romani Paul N.
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