Aqueous Chemistry
Mass conservation improvements
New steady-state assumption for OH
Sulfur oxidation controls to the aqueous chemistry solver timestep
Advection
Additional divergence-based constraint on the advection timestep
Vertical advection represented with PPM to limit numberical diffusion
Error Corrections in Horizontal Diffusion and in the Model Timestep Determination
Bug Fixes to the In-Line Emissions Algorithms
Multipollutant Model Updates
Mercury mechanism improvements
Lowered CB05 mechanism acrolein yields from 1,3-butadiene reactions
Corrections of Parallel Processing Issues
Photolysis Processor (JPROC) and In-Line Updates
Release of CMAQ diagnostic tools
DDM, primary carbon source apportionment, and sulfate tracking model
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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 |
