Testing Physics and Chemistry Sensitivities in the U.S. EPA Community Multiscale Air Quality Modeling System (CMAQ)
Uncertainties in key elements of emissions and meteorology inputs to air quality models (AQMs) can range from 50 to 100% with some areas of emissions uncertainty even higher (Russell and Dennis, 2000). Uncertainties in the chemical mechanisms are thought to be smaller (Russell and Dennis, 2000) but can range to 30% or more as new techniques are applied to re-measure reaction rate constants and yields. Single perturbation sensitivity analyses have traditionally been used with AQMs to characterize effects of these uncertainties on peak predicted ozone concentration ([O3]).
KeywordsVolatile Organic Compound Control Response Chemistry Sensitivity Full Emission Finer Grid Spacing
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