Titan's atmosphere from Voyager infrared observations. III - Vertical contributions of hydrocarbons and nitriles near Titan's north pole

Details Titan's atmosphere from Voyager infrared observations. III - Vertical contributions of hydrocarbons and nitriles near Titan's north pole Titan's atmosphere from Voyager infrared observations. III - Vertical contributions of hydrocarbons and nitriles near Titan's north pole

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991icar...89..152c&link_type=abstract

Icarus (ISSN 0019-1035), vol. 89, Jan. 1991, p. 152-167. Research supported by INSU.

Astronomy and Astrophysics

Astronomy

87

Hydrocarbons, Infrared Astronomy, Nitriles, Satellite Atmospheres, Titan, Voyager 1 Spacecraft, Atmospheric Composition, Vertical Distribution, Saturn, Satellites, Titan, Atmosphere, Stratosphere, Polar Regions, Temperature, Structure, Vertical Distribution, Spacecraft Observations, Voyager 1 Mission, Infrared, Wavelengths, Spectra, Altitude, Cyanogen, Thermal Properties, Absorption, Hydrocarbons, Mixing, Abundance, Origin, Formation, Nitriles, Iris Instrument, Radiative Transfer, Calculations, Diagrams, Op

Scientific paper

Voyager 1 IR spectra have been used to infer the Titan north polar region minor stratospheric constituents' temperature structure and vertical distribution. The mixing ratios of the species C4H2, C2H6, C3H4, HCN, HC3N, and C2N2 increase with altitude, implying upper stratosphere (and higher) formation regions. When compared with abundances obtained near the equator, it is found that the HC3N and C2N2 nitriles, together with such hydrocarbons as C2H4, C3H4, and C4H2, are substantially enhanced over the north polar region. A factor-of-2 (minimum) depletion of CO2 relative to the equator is noted; it is judged that current photochemical models are inadequate bases for interpretation of these observations.

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