Modeling of OCS in the Lower Atmosphere of Venus Yuk L. Yung M. C. Liang, X. Jiang, C. Lee, B....

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