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UTLS Chemistry and Transport Issues in WACCM

Outline. Motivation from a 3D modeling point of view.Brief Description of Global modeling framework at NCAR.Influence of Tropospheric Chemistry on UTLS region.Chemical Discontinuity at the Extratropical Thermal Tropopause.Very Short-Live Substance (e.g., halogenated species). . Motivation for Participation in START08 and other aircraft campaigns..

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UTLS Chemistry and Transport Issues in WACCM

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    1. UTLS Chemistry and Transport Issues in WACCM Doug Kinnison START 2008 Meeting 8 January 2008. dkin@ucar.edu 303-497-1469

    2. Outline

    3. Motivation for Participation in START08 and other aircraft campaigns.

    4. Modeling Framework at NCAR for use in START08

    5. NCAR Community Climate System Model The dyanmical and transport equations are solved using the explicit flux-form semi-Lagragian scheme of LR, 1997. This numerical scheme calculates explicitly calculates the fluxes in and out of a given model volume, the ensuring mass conservation. The dyanmical and transport equations are solved using the explicit flux-form semi-Lagragian scheme of LR, 1997. This numerical scheme calculates explicitly calculates the fluxes in and out of a given model volume, the ensuring mass conservation.

    6. NCAR Community Climate System Model The dyanmical and transport equations are solved using the explicit flux-form semi-Lagragian scheme of LR, 1997. This numerical scheme calculates explicitly calculates the fluxes in and out of a given model volume, the ensuring mass conservation. The dyanmical and transport equations are solved using the explicit flux-form semi-Lagragian scheme of LR, 1997. This numerical scheme calculates explicitly calculates the fluxes in and out of a given model volume, the ensuring mass conservation.

    7. CCMs represents chemical, dynamical, and physical processes from the surface to 140 km The dyanmical and transport equations are solved using the explicit flux-form semi-Lagragian scheme of LR, 1997. This numerical scheme calculates explicitly calculates the fluxes in and out of a given model volume, the ensuring mass conservation. The dyanmical and transport equations are solved using the explicit flux-form semi-Lagragian scheme of LR, 1997. This numerical scheme calculates explicitly calculates the fluxes in and out of a given model volume, the ensuring mass conservation.

    8. WACCM3 Model Description

    9.

    10. Whole Atmosphere Mechanism (115 species; 287 Gas-phase; 17 Heterogeneous; 72 photolytic)

    11.

    12. Influence of Tropospheric Chemistry on the UTLS

    13. Tropospheric and UTLS Representation of Ozone:

    14. Representation of CO at the Surface.

    15. Tropospheric representation of CO.

    16. Comparison of WACCM3 115 and 57 simulations

    17. Chemical Discontinuity at the Extratropical Thermal Tropopause

    18. Chemical Discontinuity at the Thermal Tropopause, Pan et al., JGR 2004.

    19. Diagnostics for evaluating chemistry-climate models in the extratropics, Pan et al., JGR 2007.

    20. Very Short-Live Substance (VSLS) (? = 0.5 years)

    21. Very Short-lived Substances (VSLS)

    22. TC4, Whole Air Sampler, Schauffler, Atlas, et al., AGU, 2007

    23. Halogenated Very Short-lived Substances (VSLS) currently being added the WA3 UTLS mechanism

    24. Summary

    25.

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