DEA - Università degli Studi di Brescia Aerosol long term simulation using TCAM model C. Carnevale, G. Finzi, E. Pisoni, M. Volta Department for Electronics.

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DEA - Università degli Studi di Brescia Aerosol long term simulation using TCAM model C. Carnevale, G. Finzi, E. Pisoni, M. Volta Department for Electronics and Automation University of Brescia

DEA - Università degli Studi di Brescia Index 1.The GAMES modelling system 2.The Transport Chemical Aerosol Model 3.The CityDelta III base case simulation 4.Chemical composition of simulated PM10 5.Conclusion

DEA - Università degli Studi di Brescia The Gas Aerosol Modelling Evaluation System (GAMES) Land use Topography MM5 output Meterological Pre-processor TCAM Continental model output Initial and Boundary condition Pre-processors Boundary and Initial condition 3D concentration fields Emission Model Emission inventories Emission Fields 3D wind and temperature fields Turbolence and Boundary Layer parameters VOC speciation Profiles Temporal Profiles System Evaluation Tool

DEA - Università degli Studi di Brescia TCAM (Transport and Chemical Aerosol Model): Transport and Depostion Module Eulerian 3D model Terrain-following co-ordinate system Horizontal Transport Module: chapeau function + forester filter Vertical Transport Module: Crank-Nicholson hybrid solver based on the vertical diffusivity coefficient Deposition Module –Dry deposition: resistance-based approach –Wet deposition: scavenging approach for both gas and aerosol species

DEA - Università degli Studi di Brescia TCAM (Transport and Chemical Aerosol Model): Gas chemical module Chemical Mechanism –CBIV 90 –SAPRC 90/97 –COCOH 97 Numerical Solver –QSSA (explicit) –IEH (hybrid) Species: 95 Reactions: 187 Fast-Species (12): LSODE (implicit) Slow-Species: Adams-Bashforth (explicit)

DEA - Università degli Studi di Brescia Chemical Species: 21 –12 inorganics –9 organics Size Classes: 10 (da 0.01 m a 50 m) –Fixed moving approach Involved Phenomena: –Condensation/Evaporation –Nucleation –SO 2 aqueus chemistry TCAM (Transport and Chemical Aerosol Model): Aerosol module Shell Core

DEA - Università degli Studi di Brescia CDIII base case simulation: computational domain 300x300 km 2 Horizontal resolution: 5x5 km 2 Vertical resolution: 11 varying thickness levels –1st level: 20m Simulation year: 2004

DEA - Università degli Studi di Brescia CDIII base case simulation: Gas emission fields VOC NOx NH3 SOx

DEA - Università degli Studi di Brescia CDIII base case simulation: PM emission fields PM10PM2.5

DEA - Università degli Studi di Brescia CDIII base case simulation: Monitoring station Station Yearly Mean Winter Mean Summer Mean Osio Vimercate Rezzato Juvara Limito Magenta Verziere

DEA - Università degli Studi di Brescia CDIII base case simulation: Yearly Performance Mean 95th Perc CorrelationNBIAS

DEA - Università degli Studi di Brescia CDIII base case simulation: Winter Performances Mean 95th Perc CorrelationNBIAS

DEA - Università degli Studi di Brescia CDIII base case simulation: Summer Performances Mean 95th Perc CorrelationNBIAS

DEA - Università degli Studi di Brescia CDIII base case simulation: PM10 concentration maps Year Winter Summer

DEA - Università degli Studi di Brescia CDIII base case simulation: PM10 yearly chemical composition

DEA - Università degli Studi di Brescia CDIII base case simulation: mainly inorganic fraction maps NH4+ NO3-

DEA - Università degli Studi di Brescia Conclusion Quite good performance in terms of mean values both in winter and summer; Correlation lower than 0.65 in all the station –CAUSES? TCAM reproduces reasonably the chemical composition of PM10 –overestimation of ammonium fraction

DEA - Università degli Studi di Brescia Emission pre-processor (UNIBS) POllutant Emission Model for CDIII (POEM-CDIII) provides hourly base case and scenario emission fields for: CAMx TCAM JRC data Time modulation Chemical characterization Chemical/Size characterization Gas: CBIV99 PM: 2 size bins, 8 chemical species Gas: COCOH97 PM: 6 size bins, 8 chemical species CESI AMA

DEA - Università degli Studi di Brescia Boundary pre-processor (CESI) Boundy Module provides hourly base case and scenario boundary conditions Chimere Gas: 23 species PM: 4 size bins 11 chemical species BOUNDY TCAM Gas: 62 species PM: 10 size bins 21 chemical species PM experimental size profiles

DEA - Università degli Studi di Brescia CDIII base case simulation: PM2.5/PM10 concentration map PM2.5/PM10 Concentration PM2.5/PM10 Emisison