Mixing heights calculations by MM5 and simple pre-processors for atmospheric dispersion modelling

6/11/2001


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Table of Contents

Mixing heights calculations by MM5 and simple pre-processors for atmospheric dispersion modelling

SCOPE: Examination of mixing height behavior-sensitivity under different parameterization schemes

Mixing heights calculation by different MM5 PBL schemes (stable and unstable conditions)

Figure 1. The greater Lombardy area (Northern Italy)

Figure 2. MM5V3 high-resolution blackadar PBL mixing heights

Figure 3. MM5V3 Gayno-Seaman PBL mixing heights

Figure 4. MM5V3 MRF PBL mixing heights

Figure 5. MM5V3-4 MRF PBL mixing heights

Conclusions

MM5 PBL modifications under strong unstable conditions

Figure 6. The ratio of the friction velocity versus the stability parameter

Modification of the convective velocity

Figure 7. BBL height evolution

Figure 8. MRF PBL mixing height

Figure 9. Modified MRF PBL mixing height

Nocturnal boundary layer height calculations using simple meteorological pre-processors for the L.A. Basin

Figure 10. Los Angeles area measurements sites

Figure 11. NBL heights calculated using upper data inversion heights

Figure 12. NBL heights calculated using maximum wind heights

Figure 13. NBL heights calculated using Deardorff formula applied on surface data

Figure 14. NBL heights calculated using MM5V3 Gayno Seaman PBL Scheme

Author: M.Tombrou, A. Dandou, E. Akylas and D. Boucouvala