The average PM10 daily levels over the urban area of Thessaloniki, Greece, usually exceed air quality limits and therefore improved PM chemical composition modeling results that will facilitate design most appropriate mitigation measures (e.g., limitations in wood combustion for heating purposes) are essential. system WRF-CAMx was applied a 2 × km2 horizontal resolution grid covering greater Th...

Abstract. The response of particulate matter (PM) concentrations to emission reductions was analysed by assessing the results obtained with two different source apportionment approaches. brute force (BF) method impacts, computed at various reduction levels using chemical transport models (CAMx and FARM), were compared contributions tagged species (TS) approach PSAT module). study focused on mai...

Measures to control surface ozone rely on quantifying production attributable to local versus regional (upwind) emissions. Here we simulate the relative contribution of local (i.e., within a particular state) and regional sources of surface ozone in the eastern United States (66–94°W longitude) for July 2002, 2011, and 2018 using the Comprehensive Air-quality Model with Extensions (CAMx). To de...

Abstract. In this study, the downscaling modeling chain for prediction of weather and atmospheric composition is described evaluated against observations. The consists interfacing models forecasting at different spatiotemporal scales that run in a semi-operational mode. forecasts were performed European (EU) regional Danish (DK) subregional-urban by offline coupled numerical HIRLAM chemical tra...

The air quality impacts of replacing approximately 20% of the gasoline-powered light duty vehicle miles traveled (VMT) with electric VMT by the year 2018 were examined for four major cities in Texas: Dallas/Ft Worth, Houston, Austin, and San Antonio. Plug-in hybrid electric vehicle (PHEV) charging was assumed to occur on the electric grid controlled by the Electricity Reliability Council of Tex...

Abstract. The Integrated Source Apportionment Method (ISAM) has been revised in the Community Multiscale Air Quality (CMAQ) model. This work updates ISAM to maximize its flexibility, particularly for ozone (O3) modeling, by providing multiple attribution options, including products inheriting fully from nitrogen oxide reactants, volatile organic compound (VOC) equally all or dynamically NOx VOC...

The sensitivity of ozone production to precursor emissions was investigated under five different meteorological conditions in the Mexico City Metropolitan Area (MCMA) during the MCMA-2006/MILAGRO field campaign using the gridded photochemical model CAMx driven by observation-nudged WRF meteorology. Precursor emissions were constrained by the comprehensive data from the field campaign and the ro...