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Recent Releases of CMAQ

CMAQ - CMAQv5.5.0.1

The CMAQv5.5.0.1 update is intended for users who wish to adopt the most recent bugfixes. Documentation and benchmark datasets are still based on v5.5. The next major CMAQ release will include these bugfixes along with new science updates, features, documentation, and benchmark data.

What's Changed

Documenation Updates

Full Changelog: https://github.com/USEPA/CMAQ/compare/CMAQv5.5_2Oct2024...CMAQv5.5.0.1_19May2025

Natural Resources - Air Quality - Fortran
Published by kmfoley 14 days ago

CMAQ - CMAQv5.5

DOI

CMAQv5.5, the latest version of the Community Multiscale Air Quality modeling system (release date October 2, 2024), includes many new scientific and user-oriented features:

  • Community Regional Atmospheric Chemistry Multiphase Mechanism (CRACMM) version 2 including updated formaldehyde chemistry impacting ozone and secondary organic aerosol formation

  • New support for running pre-configured global CMAQ simulations coupled with meteorology from the Model for Prediction Across Scales – Atmosphere (MPAS-A)

  • Expanded capabilities of the Integrated Source Apportionment Method (ISAM) to quantify source contributions to total secondary organic aerosol (SOA) and individual species

  • Updates to ISAM source attribution estimates, mainly impacting coarse particles and secondary organic aerosols formed through cloud processes

  • Updates to the Decoupled Direct Method (DDM) to improve second order ozone sensitivities

  • Updated chemistry to properly capture photolysis effects from sub-grid clouds

  • Revised algorithms for modeling dry deposition (M3DRY and STAGE updates)

  • Improved accuracy and error checking for BDSNP soil NO in the MEGAN biogenic emissions algorithm

  • MCIP (meteorology pre-preprocessor) updates to grid origin definition for fine scale Lambert Conformal Grids (i.e., < 4km )

  • Updates to Sulfur Tracking Model (STM) to properly attribute sulfate from gas phase chemistry

  • Updates to the Explicit and Lumped Model Output (ELMO) synthesizer to fix erroneous output for several PM aggregates including PMF_OC, PMF_NCOM, TNO3

  • New shp2cmaq python tool to convert GIS shapefiles into gridded netCDF mask files that can be used for defining regions and region families with DESID and using geographic source regions when running CMAQ-ISAM

  • Simplified workflows for easier CMAQ installation

  • See the full list of CMAQv5.5 updates on the CMAQ Wiki page. CMAQv5.5 Updates

Natural Resources - Air Quality - Fortran
Published by kmfoley 7 months ago

CMAQ - CMAQv5.4.0.5

The CMAQv5.4.0.5 update is intended for users who wish to adopt the most recent bugfixes. Documentation and benchmark datasets are still based on v5.4. The next major CMAQ release will include these bugfixes along with new science updates, features, documentation, and benchmark data.

What's Changed

Full Changelog: https://github.com/USEPA/CMAQ/compare/CMAQv5.4.0.4_9April2024...CMAQv5.4.0.5_5Sept2024

Natural Resources - Air Quality - Fortran
Published by kmfoley 8 months ago

CMAQ - CMAQv5.4.0.4

The CMAQv5.4.0.4 update is intended for users who wish to adopt the most recent bugfixes. Documentation and benchmark datasets are still based on v5.4. The next major CMAQ release will include these bugfixes along with new science updates, features, documentation, and benchmark data.

What's Changed Since V5.4.0.3

Full Changelog: https://github.com/USEPA/CMAQ/compare/CMAQv5.4_14Oct2022...CMAQv5.4.0.4_9April2024

Natural Resources - Air Quality - Fortran
Published by kmfoley about 1 year ago

CMAQ - CMAQv5.4.0.3

CMAQv5.4.0.3

The CMAQv5.4.0.3 update is intended for users who wish to adopt the most recent bugfixes for CMAQ DDM-3D. Documentation and benchmark datasets are still based on v5.4. The next major CMAQ release will include these bugfixes along with new science updates, features, documentation, and benchmark data.

What's Changed

Full Changelog: https://github.com/USEPA/CMAQ/compare/CMAQv5.4.0.2_4May2023...CMAQv5.4.0.3_9June2023

Natural Resources - Air Quality - Fortran
Published by kmfoley almost 2 years ago

CMAQ - CMAQv5.4.0.2

CMAQv5.4.0.2 is a minor update to CMAQv5.4 that includes multiple bug fixes documented in PRs https://github.com/USEPA/CMAQ/pull/186 and https://github.com/USEPA/CMAQ/pull/189.

Documentation and benchmark datasets are based on v5.4. The CMAQv5.4.0.2 update is intended for users who wish to adopt the most recent bugfixes or minor updates that improve model stability and efficiency. The next major CMAQ release will include these bugfixes along with new science updates, features, documentation, and benchmark data.

Natural Resources - Air Quality - Fortran
Published by kmfoley almost 2 years ago

CMAQ - CMAQv5.4.0.1

CMAQv5.4.0.1 is a minor update to CMAQv5.4 that includes multiple bug fixes documented in PRs https://github.com/USEPA/CMAQ/pull/180, https://github.com/USEPA/CMAQ/pull/181, https://github.com/USEPA/CMAQ/pull/182, https://github.com/USEPA/CMAQ/pull/183.

Documentation and benchmark datasets are based on v5.4. The CMAQv5.4.0.1 update is intended for users who wish to adopt the most recent bugfixes or minor updates that improve model stability and efficiency. The next major CMAQ release will include these bugfixes along with new science updates, features, documentation, and benchmark data.

Natural Resources - Air Quality - Fortran
Published by kmfoley over 2 years ago

CMAQ - CMAQv5.4

DOI

CMAQv5.4, the latest version of the Community Multiscale Air Quality modeling system (release date October 14 2022), includes many new scientific and use-oriented features:

  • 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+
  • 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
  • See the full list of CMAQv5.4 updates on the CMAQ Wiki page: CMAQv5.4 Updates

Natural Resources - Air Quality - Fortran
Published by kmfoley over 2 years ago

CMAQ - CMAQv5.3.3.3

CMAQv5.3.3.3 is a minor update to CMAQv5.3.3 that includes script and documentation updates in PR https://github.com/USEPA/CMAQ/pull/168.

Documentation and benchmark datasets are based on v5.3.3. The CMAQv5.3.3.3 update is intended for users who wish to try a new streamlined building of the WRF-CMAQ model based on CMAQv5.3.3+ with WRFv4.4+. The next major CMAQ release will include this new process for building WRF-CMAQ along with new science updates, features, documentation, and benchmark data.

Natural Resources - Air Quality - Fortran
Published by kmfoley almost 3 years ago

CMAQ - CMAQv5.3.3.2

CMAQv5.3.3.2 is a minor update to CMAQv5.3.3 that includes a bug fix documented in PR #171

Documentation and benchmark datasets are based on v5.3.3. The CMAQv5.3.3.2 update is intended for users who wish to adopt the most recent bugfixes or minor updates that improve model stability and efficiency. The next major CMAQ release will include these bugfixes along with new science updates, features, documentation, and benchmark data.

Natural Resources - Air Quality - Fortran
Published by kmfoley almost 3 years ago

CMAQ - CMAQv5.3.3.1

CMAQv5.3.3.1 is a minor update to CMAQv5.3.3 that includes multiple bug fixes documented in PRs #163, #164 , #165 .

Documentation and benchmark datasets are based on v5.3.3. The CMAQv5.3.3.1 update is intended for users who wish to adopt the most recent bugfixes or minor updates that improve model stability and efficiency. The next major CMAQ release will include these bugfixes along with new science updates, features, documentation, and benchmark data.

Natural Resources - Air Quality - Fortran
Published by kmfoley about 3 years ago

CMAQ - CMAQv5.3.3

DOI

CMAQv5.3.3 is a minor update to CMAQv5.3 that includes multiple bug fixes. This release includes a new version of the WRF-CMAQ coupled system with a streamlined build process. Additionally, MCIP users should note that starting with this release we are aligning the version numbering between CMAQ and MCIP, i.e., the MCIP updates included in this release are labeled MCIPv5.3.3.

Natural Resources - Air Quality - Fortran
Published by kmfoley over 3 years ago

CMAQ - CMAQv5.3.2

DOI

CMAQv5.3.2 includes significant updates to the CMAQ Integrated Source Apportionment Method (ISAM) and multiple minor fixes to address issues identified in CMAQv5.3.1. The new CMAQ-ISAM version includes substantial updates to the gas-phase chemistry apportionment algorithms that improves both physical and numerical aspects of the method. Users of ISAM are strongly encouraged to update to CMAQv5.3.2.

Natural Resources - Air Quality - Fortran
Published by kmfoley over 4 years ago

CMAQ - CMAQv5.3.1

DOI

CMAQ model version 5.3.1 is a minor update to CMAQv5.3 that includes multiple bug fixes to both CMAQ and MCIP (released as MCIP version 5.1), as well as a feature addition to the Detailed Emission Scaling Isolation and Diagnostic (DESID) module to allow for the definition of chemical, region and stream families.

Natural Resources - Air Quality - Fortran
Published by kmfoley over 5 years ago

CMAQ - CMAQv5.3

DOI

CMAQv5.3, the latest version of the Community Multiscale Air Quality modeling system (release date August 27 2019), includes many new scientific and use-oriented features.

Science Features:

  • Updated chlorine chemistry
  • Updated OMI data through 2017, new photolysis relevant diagnostic variables exported (e.g. AOD, single-scattering albedo, etc)
  • Extended Kinetic Mass Transfer Module for cloud chemistry (KMT2; optional)
  • Consolidated anthropogenic secondary organic aerosol into reduced number of species
  • Revised biogenic secondary organic aerosol yields for alpha-pinene ozonolysis to substantially increase monoterpene derived SOA predicted by the model.
  • Added water uptake by organic compounds
  • Revised deposition parameterizations for gas and aerosol uptake.
  • Introduced STAGE model which treats tiled deposition fluxes as a function of all land use types in a grid cell (optional).

User-Oriented Features:

  • New comprehensive User's Guide now available!
  • Improved and expanded capabilities for the Integrated Source Apportionment Method (ISAM).
  • Introduced new Detailed Emission Scaling, Isolation, and Diagnostics module (DESID).
  • Revised log file for enhanced transparency and clarity.
  • Introduced vertical extraction module for isolating, for example, ozone sonde data without printing full 4D grid.
  • Improved process analysis with Integrated Reaction Rate (IRR) functionality for all mechanisms and aerosol sub-process accounting.

See the Release Notes for more details regarding these updates.

Natural Resources - Air Quality - Fortran
Published by bnmurphy over 5 years ago

CMAQ - CMAQv5.3 Beta

CMAQv5.3, the latest version of the Community Multiscale Air Quality modeling system (release date June 2019), includes many new scientific and use-oriented features.

Science Features:

  • Updated chlorine chemistry
  • Updated OMI data through 2017, new photolysis relevant diagnostic variables exported (e.g. AOD, single-scattering albedo, etc)
  • Extended Kinetic Mass Transfer Module for cloud chemistry (KMT2; optional)
  • Consolidated anthropogenic secondary organic aerosol into reduced number of species
  • Revise biogenic secondary organic aerosol yields for alpha-pinene ozonolysis to substantially increase monoterpene derived SOA predicted by the model.
  • Added water uptake by organic compounds
  • Revised deposition parameterizations for gas and aerosol uptake.
  • Introduced STAGE model which treats tiled deposition fluxes as a function of all land use types in a grid cell (optional).

User-Oriented Features:

  • Introduced new Detailed Emission Scaling, Isolation, and Diagnostics module (DESID).
  • Revised log file for enhanced transparency and clarity.
  • Introduced vertical extraction module for isolating, for example, ozone sonde data without printing full 4D grid.
  • Improved process analysis with Integrated Reaction Rate (IRR) functionality for all mechanisms and aerosol sub-process accounting.

See the Release Notes for more details regarding these updates.

Natural Resources - Air Quality - Fortran
Published by bnmurphy over 6 years ago

CMAQ - CMAQv4.7.1 Release

I am testing out zenodo

Community Multiscale Air Quality Model version 4.7.1 (June 2010)

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 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.

Release Notes: https://www.cmascenter.org/cmaq/documentation/4.7.1/RELEASE_NOTES.txt

Full documentation available at https://www.github.com/USEPA/CMAQ/tree/4.7.1

Natural Resources - Air Quality - Fortran
Published by bnmurphy over 7 years ago

CMAQ - CMAQv5.2

CMAQv5.2, the latest version of the Community Multiscale Air Quality modeling system (release date June 2017), includes the following new features:

New windblown dust emission model: This is a physics-based model that incorporates an innovative dynamic relationship for the surface roughness length relevant to small-scale dust generation processes (Foroutan et al., 2017). The new model has been evaluated and shown to compare much better with observations than previous dust emission components in CMAQ.

New gas-phase photochemistry mechanism: Updated Carbon Bond chemical mechanism (CB6r3) added to CMAQv5.2 includes a better treatment of rural and remote chemistry, which is particularly important for modeling compliance strategies for a lowered National Ambient Air Quality Standard (NAAQS). CMAQv5.2 also includes an extension to the CB05 version of the Carbon Bond mechanism for modeling oceanic halogen chemistry in hemispheric simulations.

New pathways to organic aerosol: New sources of secondary organic aerosol have been added to the model (heterogeneous uptake of glyoxal and methylglyoxal in the Carbon Bond chemical mechanism version 6, referred to as CB6) and properties of traditional secondary organic aerosol have been updated (Pye et al., 2017). The volatility of both secondary and primary organic compounds are now treated consistently with each other and the available literature. A new model speciesHelpspeciesAn individual molecule or chemical compound. has been added to account for the organic aerosol compounds resulting from combustion processes, which are missed by the former parameterizations. This new species is constrained with available intensive and routine field observation data (Murphy et al., 2017).

Natural Resources - Air Quality - Fortran
Published by bnmurphy almost 8 years ago

CMAQ - CMAQv5.2Gamma

Introduces several bug and feature updates to CMAQv5.2Beta. Incorporates additions to documentation as well.

Natural Resources - Air Quality - Fortran
Published by bnmurphy about 8 years ago

CMAQ - CMAQv5.2Beta

Natural Resources - Air Quality - Fortran
Published by bnmurphy about 8 years ago