The U.S. EPA Office of Research and Development and the Community Modeling and Analysis System Center are pleased to announce the release of CMAQ version 5.4.
What's new in CMAQv5.4?
Updated chemistry for ozone (O3) and particulate matter (PM) formation from global-to-local scales
Introduction of the Community Regional Atmospheric Chemistry Multiphase Model (CRACMM)
Biogenic emissions algorithm options have been expanded
Revised algorithms for modeling the dry deposition of particles from the atmosphere (M3DRY and STAGE updates)
Streamlined building of the coupled WRF-CMAQ system compatible with WRFv4.4+ and an important bugfix for WRF-CMAQ users who previously used the CMAQv5.3 series
Improved efficiency, accuracy, and user experience for CMAQ instrumented model extensions CMAQ-DDM-3D and CMAQ-ISAM
Expansion of emissions diagnostic output features
Introduction of a domain-wide Budget Reporting tool
Online integration of common pollutant post-processing tasks (i.e. output total PM2.5 mass and more directly!)
Community Contribution: Incorporation of the Two-Dimensional Volatility Bases Set (2D-VBS) chemical mechanism
New versions of the Atmospheric Model and Evaluation Tool (AMETv1.5) and the Visual Environment for Rich Data Interpretation (VERDIv2.1.4)
See the full list of CMAQv5.4 updates on the EPA's new CMAQ Wiki page: CMAQ Wiki Page.