Modeling of OCS in the Lower Atmosphere of Venus Yuk L. Yung M. C. Liang, X. Jiang, C. Lee, B. Bezard and E. Marq California Institute of Technology

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Presentation transcript:

Modeling of OCS in the Lower Atmosphere of Venus Yuk L. Yung M. C. Liang, X. Jiang, C. Lee, B. Bezard and E. Marq California Institute of Technology DPS Meeting Oct 7-12, 2007

Important Processes in the Atmosphere of Venus Catalytic Chemical Cycles Heterogeneous Chemistry Middle Atmosphere Circulation OCS as tracers of chemistry and dynamics

Venus model description Two-dimensional Caltech/JPL KINETICS chemical transport model Solve continuity equation for 24 species with ~200 chemical reactions (subset of Mills’)

Role of circulation Affect the upward flux of OCS from the surface Reduce OCS abundances at high latitudes

No heterogeneous sink

Heterogeneous sink by aerosols

Modeling the Distribution of OCS in the Lower Atmosphere of Venus Yuk L. Yung M. C. Liang, X. Jiang, C. Lee, B. Bezard and E. Marq California Institute of Technology DPS 39 Meeting Oct 7-12, 2007

Acknowledgements NASA and ESA P. Drossart R. L. Shia K. Baines D. Crisp