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CESI Research Centre

Toulouse, 18-19/11/2004 Guido Pirovano - Environmental Studies, CESI Milano guido.pirovano@cesi.it. Mobility and Environmental Agency of Milan. CESI Research Centre. D.E.A. Università degli studi di Brescia. D.S.T.A. Università degli studi Amedeo Avogadro. Model intercomparison

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CESI Research Centre

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  1. Toulouse, 18-19/11/2004 Guido Pirovano - Environmental Studies, CESI Milano guido.pirovano@cesi.it Mobility and Environmental Agency of Milan CESI Research Centre D.E.A. Università degli studi di Brescia D.S.T.A. Università degli studi Amedeo Avogadro Guido Pirovano - CESI

  2. Model intercomparison • with regard to: • JNO2 • JO3 • O3 deposition velocity Guido Pirovano - CESI

  3. Photolysis rates - Methodology “Reference state”: 25th June 2001 - Hour 12.00 UTC - 10 m agl Comparisons concerning: - Different models: CAMx, MOCAGE 1, AZUR, CHIMERE 1, RAMS-CHIMIE 1/2 - Different hours: 9.00, 12.00, 15.00 UTC - Different heights: 10, 500, 4000 m agl - Different IOP: IOP2a, IOP2b (IOP1,IOP3) Guido Pirovano - CESI

  4. Photolysis rates - CAMx approach Jclear = f(f, h, O3 Col, Albedo, Haze) J = Jclear[1+Fc(Ac-1)] Ac > 1 above cloud layer Ac < 1 below/inside cloud layer Ac = f(Lw, Dz, f) for the 22nd and 25th June Ac = 1. Guido Pirovano - CESI

  5. JNO2 - 25 June 2001 H 12.00 - 10 m agl MOCAGE CAMx R-CHIMIE 1/2 Guido Pirovano - CESI

  6. JNO2 - 25 June 2001 H 09.00 - 10 m agl MOCAGE CAMx AZUR Guido Pirovano - CESI

  7. JNO2 - 25 June 2001 H 15.00 - 10 m agl MOCAGE CAMx R-CHIMIE 1/2 Guido Pirovano - CESI

  8. JNO2 - 25 June 2001 H 12.00 - CAMx profiles Guido Pirovano - CESI

  9. JNO2 - 25 June 2001 H 12.00 - 500 m agl MOCAGE CAMx R-CHIMIE 1/2 Guido Pirovano - CESI

  10. JNO2 - 25 June 2001 H 12.00 - 4000 m agl MOCAGE CAMx R-CHIMIE 1/2 Guido Pirovano - CESI

  11. JNO2 - 25 June 2001 - 22 June CAMx Guido Pirovano - CESI

  12. JNO2 - 25 June 2001 H 12.00 - 10 m agl MOCAGE CAMx R-CHIMIE 1/2 Guido Pirovano - CESI

  13. JNO2 - 22 June 2001 H 12.00 - 10 m agl MOCAGE CAMx R-CHIMIE 1/2 Guido Pirovano - CESI

  14. JNO2 - H 12.00 - O3 H 15.00 15 June 25 June 2 July 22 June Guido Pirovano - CESI

  15. JO3 - 25 June 2001 H 12.00 - 10 m agl R-CHIMIE 2 CAMx MOCAGE Guido Pirovano - CESI

  16. JO3 - 25 June 2001 H 09.00 - 10 m agl R-CHIMIE 2 CAMx AZUR Guido Pirovano - CESI

  17. JO3 - 25 June 2001 H 15.00 - 10 m agl AZUR CAMx R-CHIMIE 1 Guido Pirovano - CESI

  18. JO3 - 25 June 2001 H 12.00 - CAMx profiles Guido Pirovano - CESI

  19. JO3 - 25 June 2001 H 12.00 - 500 m agl R-CHIMIE 2 CAMx MOCAGE Guido Pirovano - CESI

  20. JO3 - 25 June 2001 H 12.00 - 4000 m agl CAMx R-CHIMIE 1/2 MOCAGE Guido Pirovano - CESI

  21. JO3 - 25 June 2001 - 22 June CAMx Guido Pirovano - CESI

  22. JO3 - 25 June 2001 H 12.00 - 10 m agl R-CHIMIE 2 CAMx MOCAGE Guido Pirovano - CESI

  23. JO3 - 22 June 2001 H 12.00 - 10 m agl R-CHIMIE 2 CAMx MOCAGE Guido Pirovano - CESI

  24. JO3 and JNO2 - H 12.00 ---- O3 - H 15.00 15 June 25 June 2 July 22 June Guido Pirovano - CESI

  25. JNO2 - Summary [s-1 1E-2] MO CX 22/6-12.00 1.3 0.8 CX MO 25/6- 9.00 1.0 0.6 CX 10 m MO MO CX MO CX 500 m 4000 m 25/6-12.00 1.4 1.1 1.3 1.4 0.85 0.8 CX MO 25/6-15.00 Range of variability ± 12% - ± 25% 1.0 0.7 Guido Pirovano - CESI

  26. JO3 - Summary [s-1 1E-5] RC2 CX/MO 22/6-12.00 4.5 3.25 AZ RC2 25/6- 9.00 2.0 3.25 4000 m 500 m 10 m RC1/2 RC2 CX MO RC2 CX 25/6-12.00 4.25 4.25 3.25 5.0 5.0 3.75 AZ CX 25/6-15.00 Range of variability ± 8% - ± 24% 1.75 2.75 Guido Pirovano - CESI

  27. Ozone Dry deposition velocity - Methodology “Reference state”: 25th June 2001 - Hour 12.00 UTC Comparisons concerning: - Different models: CAMx, MOCAGE 1, AZUR, CHIMERE 1, RAMS-CHIMIE 1/2 - Different hours: 0.00, 6.00, 12.00, 18.00 UTC - Different IOP: IOP2a, IOP2b (IOP1,IOP3) Guido Pirovano - CESI

  28. O3 dry deposition velocity - Models approach All considered models implement a “resistance approach” (Wesely) Resistances are functions mainly of: - Turbulence intensity - Land use features Guido Pirovano - CESI

  29. Vdep O3 - 25 June 2001 H 12.00 MOCAGE CAMx R-CHIMIE 1/2 Guido Pirovano - CESI

  30. Vdep O3 - 25 June 2001 H 00.00 CAMx All Models Guido Pirovano - CESI

  31. Vdep O3 - 25 June 2001 H 06.00 MOCAGE CAMx R-CHIMIE 1/2 AZUR Guido Pirovano - CESI

  32. Vdep O3 - 25 June 2001 H 18.00 AZUR CAMx MOCAGE Guido Pirovano - CESI

  33. Vdep O3 - 25 June 2001 H 12.00 MOCAGE CAMx R-CHIMIE 1/2 Guido Pirovano - CESI

  34. Vdep O3 - 22 June 2001 H 12.00 MOCAGE CAMx R-CHIMIE 1/2 Guido Pirovano - CESI

  35. Vdep O3 - H 12.00 15 June 25 June 2 July 22 June Guido Pirovano - CESI

  36. Vdep O3 - Summary of Maximum values MO RC1/2 22/6 1.8 0.6 AZ All RC1/2 MO RC1/2 MO MO 25/6 1.0 1.8 0.2 0.6 0.6 0.6 1.0 H 18.00 H 0.00 H 6.00 H 12.00 [cm s-1] Range of variability ± 25% - ± 50% Guido Pirovano - CESI

  37. Conclusions • J clearly depends on hour and height, but to a lesser extent on IOP and horizontal coordinate (except for MOCAGE) • Models usually have shown a coherent behaviour, more for JNO2 than JO3 • O3 concentrations are not directly linked to J values • Models have highlighted a range of variability of 12% to 25% for both rates • Vdep is function of both time and space (turbulence and Land use) • Models estimations have shown a quite coherent behaviour • Range of variability among models spans from 25% to 50% (for the maximum value over the domain) Guido Pirovano - CESI

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