TCAM model configuration for POMI simulations

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TCAM model configuration for POMI simulations

• C. Carnevale, G. Finzi, E. Pisoni, M. Volta
• Dipartimento di Elettronica per lAutomazione
• Università degli Studi di Brescia

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GAMES Gas Aerosol Modelling Evaluation System

Emission inventories
Land use Topography
MM5 output
PROMETEO
Temporal Profiles
POEM-PM
3D wind and temperature fields Turbolence and
Boundary Layer parameters
Emission Fields
Boundary and Initial condition
BOUNDY
TCAM
VOC speciation Profiles
PM size and chemical speciation Profiles
3D concentration fields
Chimere output
SystemEvaluation Tool
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Meteorological data pre-processing
PROMETEO
Grid projection
Grid rescaling
Turbolence parameters
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Emission data pre-processing
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Boundary Condition data pre-processing
Boundy
TCAM-grid boundary extraction
(Temporal interpolation)
Gas chemical mechanismslinking
Aerosol chemical and size classeslinking
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TCAM Transport and Depostion Module

• 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

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TCAM 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)

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TCAM Aerosol module

• Chemical Species 21
• 12 inorganics
• 9 organics
• Size Classes lt10 (from 0.01 mm to 50 mm)
• Fixed moving approach
• Involved Phenomena
• Condensation/Evaporation
• Nucleation
• SO2 aqueus chemistry

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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