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Incremental Testing of the Community Multiscale Air Quality (CMAQ) Modeling System Version 4.7
Citation:
FOLEY, K., S. J. ROSELLE, W. APPEL, P. BHAVE, J. E. PLEIM, T. L. OTTE, R. MATHUR, G. SARWAR, J. O. YOUNG, R. C. GILLIAM, C. G. NOLTE, J. T. Kelly, A. GILLILAND, AND J. O. BASH. Incremental Testing of the Community Multiscale Air Quality (CMAQ) Modeling System Version 4.7. Geoscientific Model Development . Copernicus Publications, Katlenburg-Lindau, Germany, 3(1):205-226, (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:
This paper describes the scientific and structural updates to the latest release of the Community Multiscale Air Quality (CMAQ) modeling system version 4.7 (v4.7) and points the reader to additional resources for further details. The model updates were evaluated relative to observations and results from previous model versions in a series of simulations conducted to incrementally assess the effect of each change. The focus of this paper is on five major scientific upgrades: (a) updates to the heterogeneous N2O5 parameterization, (b) improvement in the treatment of secondary organic aerosol (SOA), (c) inclusion of dynamic mass transfer for coarse-mode aerosol, (d) revisions to the cloud model, and (e) new options for the calculation of photolysis rates.
URLs/Downloads:
Incremental Testing of the Community Multiscale Air Quality (CMAQ) Modeling System Version 4.7 (PDF, NA pp, 1695 KB, about PDF)Geoscientific Model Development
