GCClassic 14.7.0

Release date: 09 Feb 2026

From CHANGELOG.md

Added

• Added "GEOS-Chem Classic vertical grids" supplemental guide in ReadTheDocs
• Added "GEOS-Chem Classic horiziontal grids" supplemental guide in ReadTheDocs
• Added "Particulate matter in GEOS-Chem" supplemental guide in ReadTheDocs
• Added docs/read_the_docs_environment.yml Conda environment file

Changed

• Updated lint-ci-workflows to run on main and dev/* branches
• Updated badges on README.md and docs/source/index.rst
• Updated geos-chem-shared-docs/editing_these_docs.rst with instructions for using a Conda environment to build RTD doc
• Updated GEOS-Chem submodule to version 14.7.0
• Updated HEMCO submodule to version 3.12.0
• Updated geos-chem-shared-docs submodule to commit 03078d4

Fixed

• Fixed security issues in GitHub Actions that caused the lint-ci-workflows action to fail

Removed

• Removed the Azure Dev Pipelines workflows; these are now superseded by the gcclassic-compile-tests GitHub action

Pull requests included

• Merge GCClassic 14.6.3 into dev/14.7.0 by @yantosca in #99
• Fix security issues in GitHub actions; Remove Azure Dev Pipelines workflows by @yantosca in #100
• GCClassic 14.7.0 release by @yantosca in #105

Full Changelog: 14.6.3...14.7.0

See the GEOS-Chem 14.7.0 page for a complete list of updates.

GCClassic 14.6.3

Release date: 28 Jul 2025

See also

• GEOS-Chem 14.6.3 release (science code base)
• HEMCO 3.11.2 release

From CHANGELOG.md

Added

• Added -DDEBUG flag to GEOSChem_Fortran_FLAGS_DEBUG_Intel and GEOSChem_Fortran_FLAGS_DEBUG_GNU to toggle debug-only code

Changed

• Updated CMakeLists.txt to set compilation option mcmodel=small for ARM-based CPUs, as ARM does not support mcmodel=medium
• Updated ReadTheDocs documentation to state that we are using Spack v0.23.1 in the Spack installation guide
• Updated GEOS-Chem submodule to 14.6.3
• Updated HEMCO submodule to 3.11.2

Pull requests included

• Update CMakeLists.txt to use mcmodel=small when compiling GEOS-Chem Classic on ARM processors by @yantosca in #91
• Add -DDEBUG to Intel and GNU debug compiler flags by @yantosca in #96
• GCClassic 14.6.3 release by @yantosca in #97

Full Changelog: 14.6.2...14.6.3

GCClassic 14.6.2

Release date: 12 Jun 2025

From CHANGELOG.md

Changed

• Updated GEOS-Chem submodule to 14.6.2

Pull requests included

• GCClassic 14.6.2 release by @yantosca in #92

Full Changelog: 14.6.1...14.6.2

GCClassic 14.6.1

Release date: 29 May 2025

From CHANGELOG.md

Added

• Added RTD documentation updates for GEOS-Chem 14.6.1

Changed

• Updated GEOS-Chem submodule to version 14.6.1
• Updated HEMCO submodule to version 3.11.1

Pull requests included

• GCClassic 14.6.1 release by @yantosca in #90

Full Changelog: 14.6.0...14.6.1

GCClassic 14.6.0

From CHANGELOG.md

Release date: 18 Apr 2025

Added

• Added a CI workflow that checks for issues in GCClassic's CI workflows
• Added documentation for GEOS-Chem simulations to ReadTheDocs

Changed

• Bumped jinja2 to 3.1.6 in docs/source/requirements.txt (fixes a security issue identified by @dependabot)

Pull requests included

• Merge GCClassic 14.5.2 into dev/14.6.0 by @yantosca in #84
• Contribute CI linting workflow by @jwallwork23 in #86
• GCClassic 14.6.0 release by @yantosca in #87

New Contributors

• @jwallwork23 made their first contribution in #86

Full Changelog: 14.5.3...14.6.0

GCClassic 14.5.3

Release date: 05 March 2025

From CHANGELOG.md

Added

• Updated RTD docs to state that users wishing not to open AWS account can use AWS CLI commands with --no-sign-request1

Changed

• Updated GEOS-Chem submodule to 14.5.3
• Updated HEMCO submodule to 3.10.2

Fixed

• Fixed error with the rubric section in the RTD planeflight documentation

Pull requests included

• GCClassic 14.5.3 release by @yantosca in #85

Full Changelog: 14.5.2...14.5.3

GCClassic 14.5.2

Release Date: 12 Feb 2025

From CHANGELOG.md

Added

• Added clarifying text about which types of data can use altitude coordinates for the Planeflight diagnostic in RTD documentation
• Added warning for users to preprocess ObsPack GLOBALVIEWplus CH4 data files before reading into GEOS-Chem in RTD documentation
• Added text to RTD stating that data download from s3://geos-chem is and s3://gcgrid is free

Changed

• Bumped jinja2 to version 3.1.5 in docs/requirements.txt to fix a security issue
• Changed the build sequence so that the KPP-Standalone is only built when configuring with -DKPPSA=y
• Updated RTD documentation to state that older Intel compilers may cause unexpected results; Also updated to recommend GCC 10 and later.
• Updated RTD documentation for fullchem rundir creation, which now asks users if they wish to build KPP-Standalone

Pull requests included

• Bump jinja2 to 3.1.5 as suggested by Dependabot by @yantosca in #81
• Do not build KPP-Standalone executable unless specifically requested at compile time by @yantosca in #82
• GCClassic 14.5.2 release by @yantosca in #83

Full Changelog: 14.5.1...14.5.2

GCClassic 14.5.1

Release date: 10 Jan 2025

From CHANGELOG.md

Added

• Added code to src/CMakeLists.txt to build & install the KPP standalone executable when fullchem or custom mechanisms are selected
• Added ReadTheDocs Supplemental Guide on using the KPP-Standalone Box Model and KPP-Standalone Interface in GEOS-Chem

Changed

• Changed submodules: true to submodules: recursive in .ci-pipelines/*.yml files, which will fetch all levels of submodules in Azure CI tests.

Fixed

• Fixed logic error in src/CMakeLists.txt that attempted to build the KPP standalone for the carbon simulation (see geoschem/GCClassic #78)
• Fixed broken links in ReadTheDocs documentation

Pull requests included

• Add KPP standalone model to GEOS-Chem 14.5.1 by @yantosca in #73
• Fix configuration error in GEOS-Chem Classic continuous integration tests on Azure by @yantosca in #77
• Fixed error in CMake logic that attempted to build the KPP standalone for mechanisms other than fullchem and custom by @yantosca in #79
• GCClassic 14.5.1 release by @yantosca in #80

Full Changelog: 14.5.0...14.5.1

See the GEOS-Chem 14.5.1 page for a complete list of updates.

GCClassic 14.5.0

Release date: 08 Nov 2024

From CHANGELOG.md

Changed

• Updated GEOS-Chem to 14.5.0
• Updated HEMCO to 3.10.0
• Updated Cloud-J to 8.0.1
• Updated docs/source/geos-chem-shared-docs/spack/packages.yaml to use GCC 12.2.0 compilers
• Updated documentation for version 14.5.0
• Moved several doc files (not supplemental guides) that are used in both GCClassic and GCHP the to geos-chem-shared-docs/doc folder

Fixed

• Fixed formatting error in .github/workflows/stale.yml that caused the Mark Stale Issues action not to run
• Updated to Python package jinja2==3.1.4 in docs/requirements.txt (fixes a security issue)

See the GEOS-Chem 14.5.0 page for a complete list of updates.

Pull requests included

• Bugfix: Restore stale workflow functionality by @msulprizio in #67
• ReadTheDocs updates for GEOS-Chem Classic 14.5.0 by @yantosca in #68

Full Changelog: 14.4.3...14.5.0

See the GEOS-Chem 14.5.0 page for a complete list of updates.

GCClassic 14.4.3

Release date: 13 Aug 2024

From CHANGELOG.md

Changed

• Updated GEOS-Chem (science codebase) to 14.4.3
• Updated HEMCO to 3.9.3
• Updated Cloud-J to 7.7.3
• Updated documentation (clarified discussion of grid edges)

Fixed

• Added brackets around exempt-issue-labels list in .github/workflows/stale.yml

Pull Requests Included

• update latitude and longitude bounds description by @nicholasbalasus in #65

New Contributors

• @nicholasbalasus made their first contribution in #65

Full Changelog: 14.4.2...14.4.3