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Global Simulation of CH 3 Cl

Global Simulation of CH 3 Cl. Model Description. GEOS-CHEM global 3D model (v.5.02) DAO GEOS-STRAT with simulation year from September 1996 - August 1997 Resolution: 4 º latitude x 5 º longitude, 26 layers. CH 3 Cl Emissions used in this study.

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Global Simulation of CH 3 Cl

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  1. Global Simulation of CH3Cl

  2. Model Description • GEOS-CHEM global 3D model (v.5.02) • DAO GEOS-STRAT with simulation year from September 1996 - August 1997 • Resolution: 4 º latitude x 5 º longitude, 26 layers

  3. CH3Cl Emissions used in this study

  4. Emission distributions for northern and southern hemisphere

  5. Annual net oceanic flux Calculated GEIA Inventory

  6. I-a) Concentration comparison between observations and model at six surface stations (1/2)

  7. I-a) Concentration comparison between observations and model at six surface stations (2/2)

  8. II) Vertical profile comparison between observations and model

  9. II) Vertical profile comparison: observations VS. model (1/7)

  10. II) Vertical profile comparison: observations VS. model (2/7)

  11. II) Vertical profile comparison: observations VS. model (3/7)

  12. II) Vertical profile comparison: observations VS. model (4/7)

  13. II) Vertical profile comparison: observations VS. model (5/7)

  14. II) Vertical profile comparison: observations VS. model (6/7)

  15. II) Vertical profile comparison: observations VS. model (7/7)

  16. II) Vertical profile comparison between observations and model

  17. III-a) Latitude-altitude concentration distributions: observations VS. model for TRACE-P region (east)

  18. III-a) Latitude-altitude concentration distributions: observations VS. model for TRACE-P region (east)

  19. III-a) Latitude-altitude concentration distributions: comparisons of biomass burning and biogenic CH3Cl to background concentrationsfor TRACE-P region (east)

  20. IV-a) Correlation CH3OH VS. CH3Cl for TRACE-P (east)

  21. III-b) Latitude-altitude concentration distributions: observations VS. model for TRACE-P region (west)

  22. III-b) Latitude-altitude concentration distributions: observations VS. model for TRACE-P region (west)

  23. III-b) Latitude-altitude concentration distributions: comparisons of biomass burning and biogenic CH3Cl to background concentrationsfor TRACE-P region (west)

  24. Global Simulation of CH2O

  25. GOME SEP 1996 GEOS-CHME SEP 1997 GEOS-CHEM (inactive OH) without Biogenic emissions

  26. Inactive OH Inact. OH w/o 3-body rxn STD NO NO2 PRPE

  27. Regional Simulations

  28. RCTM GEOS-CHEM • MM5 data assimilation at 70x70km, 20 layers (up to 14 km), and 5 min time step output • Grell scheme with mid-level downdraft • Lightning NOx parameterization by Allen et al. [2000] and Pickering et al. [1998] • The same chemical module as GEOS-CHEM • DAO data assimilation (GEOS-3) at 4°x5°, 48 layers (to 80 km), and 6-hour time step output • Full O3-NOx-HC chemistry with 24 tracers and 120 species [Bey et al., 2001] • Provides initial and boundary trace gas conditions for RCTM

  29. 500 mb

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