Particulate Matter Modelinq in the Los Anaeles Basin Using SAQM-AERO

摘要

The SARMAP air quality model, enhanced with aerosol modeling capability, and its associated components were developed to understand causes of ozone (O3) and par- ticulate matter exceedances in the San Joaquin Valley of California. In order for this modeling system to gain in- creasing acceptance and use in guiding air quality man- agement, it is important to assess how transportable this modeling system is across geographic domains. We de- scribe the first application of the modeling system out- side the `'home'' domain for which it was developed and evaluated. We have chosen the August 27-28, 1987, in- tensive monitoring period of the Southern California Air Quality Study to evaluate the performance of the model- ing system and to assess its sensitivity to emission con- trol options. The predicted surface concentrations of O3 and other gas-phase species were spatially and temporally correlated with measured data. The fractional normalized absolute error was 0.32 to 0.36 for O3' and somewhat larger for other species. The fractional normalized bias for O3 on.August 27 and 28, 1987, was 0.02 to 0.04. The simu- lated PM2.5 mass and constituent species concentrations reproduced the magnitude and variability of the observed daytime concentrations at most locations; however, night- time PM2.5 concentrations were overpredicted by the model. The model's response to emission control options was consistent with other models of the same genre.