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DEA - Universit degli Studi di Brescia TCAM model configuration for POMI simulations C. Carnevale, G. Finzi, E. Pisoni, M. Volta Dipartimento di Elettronica per lAutomazione Universit degli Studi di Brescia Slide 2 DEA - Universit degli Studi di Brescia Land use Topography MM5 output PROMETEO TCAM Chimere output BOUNDY Boundary and Initial condition 3D concentration fields POEM-PM Emission inventories Emission Fields 3D wind and temperature fields Turbolence and Boundary Layer parameters VOC speciation Profiles Temporal Profiles System Evaluation Tool GAMES: Gas Aerosol Modelling Evaluation System PM size and chemical speciation Profiles Slide 3 DEA - Universit degli Studi di Brescia Meteorological data pre-processing PROMETEO Grid projection Grid rescaling Turbolence parameters Slide 4 DEA - Universit degli Studi di Brescia Emission data pre-processing POEM-PM Temporal Modulation VOC speciation VOC lumping PM10 speciation Slide 5 DEA - Universit degli Studi di Brescia Boundary Condition data pre-processing Boundy TCAM-grid boundary extraction (Temporal interpolation) Gas chemical mechanisms linking Aerosol chemical and size classes linking Slide 6 DEA - Universit degli Studi di Brescia Eulerian 3D model Terrain-following coordinate 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 TCAM: Transport and Depostion Module Slide 7 DEA - Universit degli Studi di Brescia 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) TCAM: Gas chemical module Slide 8 DEA - Universit degli Studi di Brescia Chemical Species: 21 12 inorganics 9 organics Size Classes:Slide 9 DEA - Universit degli Studi di Brescia TCAM configuration overview Grid resolution: D1: 5x5km2 (?) or 10x10km2 D2: 2.5x2.5km2 (?) or 5x5km2 Vertical resolution First level: 20 mt (top) Last level: 4000 mt a.g.l. (top) Chemistry Gas: COCOH97 - 95 species, 187 reactions, LSODE) Aerosol: 21 species, 10 (?) size classes, SCAPE2