Isotopic Fractionation Of Trace Molecules In The Atmosphere Of Titan And Implications For The Evolution Of The Atmosphere

Details Isotopic Fractionation Of Trace Molecules In The Atmosphere Of Titan And Implications For The Evolution Of The Atmosphere Isotopic Fractionation Of Trace Molecules In The Atmosphere Of Titan And Implications For The Evolution Of The Atmosphere

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.3309l&link_type=abstract

American Astronomical Society, DPS meeting #41, #33.09

Astronomy and Astrophysics

Astronomy

Scientific paper

High precision measurements of the isotopic compositions of H, C, N and O in several molecules in the atmosphere of Titan have recently been obtained by the Cassini-Huygens instruments. We developed a one-dimensional photochemistry-transport model that includes photolytic and chemical processes for methane, ethane, water, nitrogen and their isotopologues. Transport is parameterized by eddy diffusion. Most of the observations can be explained by our model. In addition, a hydrodynamic model is developed for studying the escape that could have occurred in the early history of Titan. Implications of our current model for the chemical evolution of Titan are discussed.

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