Community Multiscale Air Quality (CMAQ) Model

CMAQ is an active open-source development project of the U.S. Environmental Protection Agency Atmospheric Science Modeling Division. It consists of a suite of computer programs to model air quality issues, including tropospheric ozone, particulate matter (PM), air toxics, acid deposition, and visibility degradation. The model can address multiple pollutants at various spatial and temporal resolutions. CMAQ can be used for air quality modeling analysis of urban, regional and national levels using the Euclidean grid cells with horizontal dimension of ~1 km x 1 km to ~36 km x 36 km. CMAQ simulations can be performed to evaluate longer term (annual to multi-year) climatologies as well as short term (weeks to months) transport from localized sources. Addressing multiple air quality issues at multiple spatial and temporal scales, CMAQ has a "one atmosphere" perspective that combines the efforts of the scientific community. CMAQ is supported and distributed by the Community Modeling and Analysis System (CMAS) Center at the University of North Carolina at Chapel Hill, North Carolina.

Further Information

CMAQ Model Home Page:
Community Modeling and Analysis System (CMAS) Center:

CMAQ Modeling System

CMAQ model

CMAQ 3-D Grid Cell Representation

CMAQ 3-D Grid Cell Representation
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