Latitudinal Dependence of Titan's Lower Stratospheric Organic Ice Clouds

Details Latitudinal Dependence of Titan's Lower Stratospheric Organic Ice Clouds Latitudinal Dependence of Titan's Lower Stratospheric Organic Ice Clouds

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.5805a&link_type=abstract

American Astronomical Society, DPS meeting #42, #58.05; Bulletin of the American Astronomical Society, Vol. 42, p.1083

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Scientific paper

Analyses of Cassini CIRS far infrared limb spectra of Titan at multiple latitudes reveal a broad emission feature between 70 and 270 cm-1, restricted to altitudes in the lower stratosphere between 50 and 100 km. This broad emission feature is chemically different from Titan's photochemical aerosol, which has an emission feature peak around 145 cm-1. The shape of the observed broad emission feature resembles a mixture of the solid component of the two most abundant nitriles in Titan's stratosphere, HCN and HC3N. The 50 to 100 km altitude range corresponds closely to the vertical location where HCN and HC3N are expected to condense and form suspended ice crystals. This is the first clear evidence that stratospheric clouds, while less abundant, are located in regions other than high northern winter latitudes.

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