Modeling of OCS in the Lower Atmosphere of Venus

Yuk L. YungM. C. Liang, X. Jiang, C. Lee, B. Bezard and E. Marq

California Institute of Technologyyly@gps.caltech.edu

DPS MeetingOct 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

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Heterogeneous sink by aerosols

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Modeling the Distribution of OCS in the Lower Atmosphere of Venus

Yuk L. YungM. C. Liang, X. Jiang, C. Lee, B. Bezard and E. Marq

California Institute of Technologyyly@gps.caltech.edu

DPS 39 MeetingOct 7-12, 2007

Acknowledgements

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