Evaluation of CMAQ PM Results Using Size-resolved Field Measurement Data: The Particle Diameter Issue and Its Impact on Model Performance Assessment
One uncertainty in evaluating particulate matter (PM) modelling results is caused by mismatches among regulated, measured, and modelled particle diameters. Current PM regulations are based on the aerodynamic diameter (EPA, 2004). PM measurements also target the aerodynamic diameter in order to address regulatory concerns. However, in air quality models, particles are often modelled on the basis of the Stokes diameter. To evaluate model performance using size–resolved measurement data, it seems logical that modelling results should be given in the aerodynamic diameter.
KeywordsAerodynamic Diameter Mode Particle Surface Area Concentration Evaluate Model Performance Total Mass Concentration
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