Articles | Volume 14, issue 5
https://doi.org/10.5194/gmd-14-2867-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-14-2867-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Model evaluation paper
| 
20 May 2021
Model evaluation paper |
| 20 May 2021
| 20 May 2021
The Community Multiscale Air Quality (CMAQ) model versions 5.3 and 5.3.1: system updates and evaluation
K. Wyat Appel
CORRESPONDING AUTHOR
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Jesse O. Bash
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Kathleen M. Fahey
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Kristen M. Foley
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Robert C. Gilliam
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Christian Hogrefe
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
William T. Hutzell
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Daiwen Kang
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Rohit Mathur
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Benjamin N. Murphy
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Sergey L. Napelenok
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Christopher G. Nolte
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Jonathan E. Pleim
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
George A. Pouliot
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Havala O. T. Pye
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Limei Ran
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
now at: Natural Resources Conservation Service, U.S. Department of
Agriculture, Greensboro, NC, USA
Shawn J. Roselle
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
retired
Golam Sarwar
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Donna B. Schwede
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Fahim I. Sidi
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
Tanya L. Spero
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
David C. Wong
Center for Environmental Measurement and Modeling, Office of Research and
Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
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Latest update: 06 Dec 2025
Short summary
This paper details the scientific updates in the recently released CMAQ version 5.3 (and v5.3.1) and also includes operational and diagnostic evaluations of CMAQv5.3.1 against observations and the previous version of the CMAQ (v5.2.1). This work was done to improve the underlying science in CMAQ. This article is used to inform the CMAQ modeling community of the updates to the modeling system and the expected change in model performance from these updates (versus the previous model version).
This paper details the scientific updates in the recently released CMAQ version 5.3 (and v5.3.1)...
