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The Community Multiscale Air Quality (CMAQ) model is a multi-phase chemical transport modeling system that combines state of the art computing techniques with the latest air quality science to simulate atmospheric pollutants across scales. CMAQ was developed and first released in 1998 and since then has undergone continual science enhancements and model structure updates. CMAQ version 5.4, a major update to the CMAQ version 5.3 series, was released in 2022. The featured updates include revisions to the carbon bond chemical mechanism and its representation of halogen chemistry, improvements to aerosol dry deposition in both the M3Dry and Surface Tiled Aerosol and Gaseous Exchange (STAGE) deposition schemes, modifications to the inline wind-blown dust emissions scheme to address the persistent underprediction seen with recent versions, and addition of the Model of Emissions of Gases and Aerosols from Nature (MEGAN) as a new online biogenic emissions option. A summary and evaluation on a hemispheric scale of these updates in CMAQv5.4 is presented.

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The Community Multiscale Air Quality (CMAQ) Model Version 5.4: Updates and Results from Northern Hemispheric Scale Evaluation

  • 会议论文

  • 发表日期：

    2025年

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  • Fahim Sidi,
  • Wyat Appel,
  • Jesse Bash,
  • O. Russell Bullock,
  • Emma D’Ambro,
  • Kathleen Fahey,
  • Sara Farrell,
  • Kristen Foley,
  • Robert Gilliam,
  • Barron Henderson,
  • Jerry Herwehe,
  • Christian Hogrefe,
  • William Hutzell,
  • Daiwen Kang,
  • Mike Madden,
  • Megan Mallard,
  • Rohit Mathur,
  • Ben Murphy,
  • Sergey Napelenok,
  • Chris Nolte,
  • Bryan Place,
  • Jonathan Pleim,
  • George Pouliot,
  • Havala Pye,
  • Golam Sarwar,
  • Donna Schwede,
  • Uma Shankar,
  • Tanya Spero,
  • Jeff Willison,
  • David Wong

摘要

The Community Multiscale Air Quality (CMAQ) model is a multi-phase chemical transport modeling system that combines state of the art computing techniques with the latest air quality science to simulate atmospheric pollutants across scales. CMAQ was developed and first released in 1998 and since then has undergone continual science enhancements and model structure updates. CMAQ version 5.4, a major update to the CMAQ version 5.3 series, was released in 2022. The featured updates include revisions to the carbon bond chemical mechanism and its representation of halogen chemistry, improvements to aerosol dry deposition in both the M3Dry and Surface Tiled Aerosol and Gaseous Exchange (STAGE) deposition schemes, modifications to the inline wind-blown dust emissions scheme to address the persistent underprediction seen with recent versions, and addition of the Model of Emissions of Gases and Aerosols from Nature (MEGAN) as a new online biogenic emissions option. A summary and evaluation on a hemispheric scale of these updates in CMAQv5.4 is presented.