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Welcome to CMAQ-Model.org

This is the official CMAQ website hosted by the Community Modeling and Analysis System (CMAS) Center at the University of North Carolina at Chapel Hill. CMAQ is an active open-source development project of the U.S. EPA Atmospheric Science Modeling Division that consists of a suite of programs for conducting air quality model simulations. CMAQ is supported and distributed by the CMAS Center.

CMAQ version 5.0.1


Simulate multiple tropospheric air quality issues at once using this highly optimized, state-of-the-science suite of modeling software

Download CMAQv5.0.1 and MCIPv4.1

CMAQv5.0.1 Technical Documentation and Release Notes

MCIPv4.1 Release Notes

CMAQv5.0 Users Manual

CMAQ combines current knowledge in atmospheric science and air quality modeling with multi-processor computing techniques in an open-source framework to deliver fast, technically sound estimates of ozone, particulates, toxics, and acid deposition.

Features of CMAQv5.0.1

 

CMAQ News

 

CMAQ 5.0.1 Released

CMAQv5.0.1 includes several bug fixes to CMAQv5.0 and a new two-way coupled WRF-CMAQ model. See the Release Notes for a complete description of this release.

CMAQv4.7.1 (June 2010)

CMAQv4.7.1 includes several updates to the model infrastructure and science algorithms. Important new features include diagnostic tools, such as DDM, sulfate tracking, and primary carbon apportionment. See the Release Notes for a complete description of this release.

NERL releases CMAQ article (November 2009)

The EPA National Exposure Research Lab (NERL) released a feature article on CMAQ on their website in November 2009. The article highlights the advances made by EPA in using CMAQ to study air quality.

Beta version of CMAQ v4.7.1 Operational Guidance Document (OGD) Now Available

The first ever Operational Guidance Document for CMAQ is now available in HTML and PDF formats. Changes are still being made daily to this document, so please consider it as a beta version. We welcome any feedback you have about the CMAQ OGD. Please direct feedback to cmas@unc.edu.

MCIPv3.6 (March, 2010)

MCIPv3.6 encompasses all changes since the last official release of MCIP (version 3.4.1). Users are encouraged to update to this version of MCIP, particularly for WRF-based applications. See the Release Notes for a complete description of this release.

CMAQ Training in Sofia, Bulgaria

CMAS trainers traveled to Sofia, Bulgaria in August 2006 to teach CMAQ to modelers from government and university groups around Europe. Sponsored by the ACCENT initiative, the special workshop was attended by over 30 scientists and included tutorials on SMOKE

ACCENT-CMAS August 2006 CMAQ class

MCIP version 4.1

The meteorology-chemistry interface processor converts MM5 and WRF output to CMAQ and SMOKE-compatible format.

Download the MCIP version 4.1 from the CMAS Center to take advantage of the latest updates to the program.

 

 

 

 
System Requirements
O/S Linux
Processor 64 or 32-bit x86
Memory 512 Mb RAM
Disk Space > 80 Gb
Software VERDI, I/O API, netCDF, IDV, Portland Group Fortran, Intel Fortran

Support Quick Links

Get Help

CMAQ v5.0 Operational Guidance Document

M3User Listserv

M3List Listserv


CMAQ Resources

CMAQ at the U.S. EPA. This is the host site for CMAQ at the U.S. EPA Atmospheric Sciences Modeling Division.

NOAA CMAQ-WRF Forecast. Real-time air quality forecasts with CMAQ from the National Weather Service.

CMAQ Forecast Image

CMAQ Science Document. Access the original science alrgorithms documentation for CMAQ.

CMAQ Peer Review. Access results of the past two CMAQ peer review panels.

CMAQ Bibliography. Find references to the science in CMAQ.

The CMAQ-model.org links page provides access to other sources of emissions data.


Documentation

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Partners

Institute for the Environment

CMAS Center

U.S. EPA ASMD