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camx and cmaq technical summary

CAMx v6.10 and CMAQ v5.0.2

Summary Technical Features

Features that are common to both models

  • Horizontal Modeling Domain - uniform grid spacing; inherits from met model
  • Vertical Layer Structure - variable sigma layer heights; inherits from met model
  • Boundary Conditions - downscale from global CTM

Science Options

Science/Configuration OptionCAMx v6.10CMAQ v5.0.2Details
NestingOne-way, Two-way, and Flexi-nestOne-way 
Horizontal Boundary Conditions   
Top Boundary Conditions   
MeteorologyWRF-CAMx (Offline)  
EmissionsSMOKE (Offline)  
Plume-in gridGREASD (simple chemistry); IRON (complex chemistry)  
Gas-Phase ChemistryCB05, CB6, CB6r2, CB6 with iodine; Mechanism 10 (user defined); SAPRC99  
Gas-Phase Chemistry SolverEBI, IEH, LSODE/Gear  
PhotolysisTUV  
Aqueous ChemistryRADM-AQ  
Aerosol ChemistryTwo-mode course/fine scheme (modal) and multi-sectional CMU scheme (sectional)  
Aerosol ThermodynamicsISOROPEA  
Secondary Organic AerosolsSOAP  
Other ChemistryMulti-phase Hg; Surface Chemistry/Re-emission Model  
Dry Deposition11 category LULC (Wesely/Slinn), 26 category LULC (Zhang)  
Wet DepositionScavenging model  
Horizontal AdvectionPPM, Bott  
Horizontal DiffusionK-theory 1st order closure  
Vertical AdvectionImplicit backward-Euler (time) hybrid centered/upstream (space) solver  
Vertical DiffusionK-theory, ACM2  
Integration Time Step   
Multi-ProcessingOpenMP; MPI; Hybrid OpenMP-MPI  

Diagnostic Features

OptionCAMx v6.10CMAQ v5.0.2Details
Source TaggingOSAT/PSATOSAT; PSAT; GOAT; APCA;One-way 
Process AnalysisIPR, IRR, CPA  
Sensitivity AnalysisDDM, HDDM, PM-DDM  
TracersReactive Tracers (RTRAC)