DPS 35th Meeting, 1-6 September 2003
Session 10. Titan I
Oral, Chairs: C. A. Griffith and D. B. Curtis, Wednesday, September 3, 2003, 10:30am-12:00noon, DeAnza I-II

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[10.03] Properties of Titan's methane-ethane clouds from microphysical modeling

E.L. Barth, O.B. Toon (LASP/University of Colorado)

Titan's temperature profile allows for the condensation of many of its trace gases throughout the troposphere and lower stratosphere. It is likely that cloud particles will be composed of a mixture of multiple volatile components surrounding a tholin core. We have developed a microphysics model to study the evolution of clouds composed of multiple condensible species in Titan's atmosphere.

We will report results on cloud properties (including particle size, composition, vertical extent and optical depth) for clouds composed of both methane and ethane. New laboratory measurements of methane nucleation onto an ethane substrate are incorporated into the model. We consider cases of both pure methane and methane containing dissolved nitrogen.

Funding was provided by Cassini science grant JPL 961196.

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Bulletin of the American Astronomical Society, 35 #4
© 2003. The American Astronomical Soceity.