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Eta-CMAQ Air Quality Forecasts for O3 and Related Species Using Three Different Photochemical Mechanisms (CB4, CB05, SAPRC-99): Comparisons with Measurements During the 2004 ICARTT Study
Citation:
YU, S., R. MATHUR, G. SARWAR, D. KANG, D. Tong, G. POULIOT, AND J. E. PLEIM. Eta-CMAQ Air Quality Forecasts for O3 and Related Species Using Three Different Photochemical Mechanisms (CB4, CB05, SAPRC-99): Comparisons with Measurements During the 2004 ICARTT Study. Atmospheric Chemistry and Physics. Copernicus Publications, Katlenburg-Lindau, Germany, 10(6):3001-3025, (2010).
Impact/Purpose:
The National Exposure Research Laboratory′s (NERL′s) Atmospheric Modeling and Analysis Division (AMAD) conducts research in support of EPA′s mission to protect human health and the environment. AMAD′s research program is engaged in developing and evaluating predictive atmospheric models on all spatial and temporal scales for forecasting the Nation′s air quality and for assessing changes in air quality and air pollutant exposures, as affected by changes in ecosystem management and regulatory decisions. AMAD is responsible for providing a sound scientific and technical basis for regulatory policies based on air quality models to improve ambient air quality. The models developed by AMAD are being used by EPA, NOAA, and the air pollution community in understanding and forecasting not only the magnitude of the air pollution problem, but also in developing emission control policies and regulations for air quality improvements.
Description:
In this study, we compare the CB4, CB05 and SAPRC-99 mechanisms by examining the impact of these different chemical mechanisms on the Eta-CMAQ air quality forecast model simulations for O3 and its related precursors over the eastern US through comparisons with the intensive observational data obtained during the 2004 International Consortium for Atmospheric Research on Transport and Transformation (ICARTT) study. The 2004 ICARTT experiment provided a comprehensive set of measurements of chemical constituents, both from surface and aircraft based platforms, which can be used to examine in detail the impact of chemical mechanisms from a multi-pollutant perspective, both in terms of their surface concentrations as well as vertical structure. This aspect constitutes the primary difference of this study from the previous comparative analyses of these mechanisms.
URLs/Downloads:
Atmospheric Chemistry and Physics
Eta-CMAQ Air Quality Forecasts for O3 and Related Species Using Three Different Photochemical Mechanisms (CB4, CB05, SAPRC-99): (PDF, NA pp, 8761 KB, about PDF)