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Changelog

This file documents all notable changes to the GEOS-Chem Classic wrapper repository since version 13.4.1. See also CHANGELOG files for individual submodules:

  • src/geos-chem/CHANGELOG.md
  • src/HEMCO/CHANGELOG.md
  • src/Cloud-J/CHANGELOG.md

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[14.7.1] - 2026-04-13

Added

  • Added CMake options MECH, USE_REAL8, and SANITIZE to CMakeScripts/summarize_build
  • Added CMake build switch called JACOBIAN for carbon Jacobian runs

Changed

  • Updated GitHub Actions to the latest versions
  • Added several supplemental science guides to ReadTheDocs
  • Added splash pages for "Supplemental Science Guides" and "Supplemental Technical Guides" to ReadTheDocs
  • Updated Cloud-J submodule to commit 16d18b0 ("Fixed issues in format statements for verbose output")
  • Updated GEOS-Chem submodule to 14.7.1
  • Updated HEMCO submodule to 3.12.1

[14.7.0] - 2026-02-06

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  • Removed the Azure Dev Pipelines workflows; these are now superseded by the gcclassic-compile-tests GitHub action

[14.6.3] - 2025-07-28

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.

[14.6.2] - 2025-06-12

Changed

  • Updated GEOS-Chem submodule to 14.6.2

[14.6.1] - 2025-05-29

Added

  • Added RTD documentation updates for GEOS-Chem 14.6.1

[14.6.0] - 2025-04-18

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)

Fixed

  • Fixed broken links and references in the "GEOS-Chem restart files" ReadTheDocs documentation

[14.5.3] - 2025-03-05

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

[14.5.2] - 2025-02-12

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

[14.5.1] - 2025-01-10

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

[14.5.0] - 2024-11-08

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)

[14.4.3] - 2024-08-13

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

[14.4.2] - 2024-07-24

Added

  • ReadTheDocs update for for Cloud-J input parameter num_levs_with_cloud
  • ReadTheDocs update: add section about using a dry-run simulation to Quickstart Guide

Changed

  • Updated Cloud-J submodule to 7.7.2
  • Discontinue support of FAST-JX for all simulations except Hg
  • ReadTheDocs now describes latitude and longitude bounds as grid cell edges

[14.4.1] - 2024-06-28

Fixed

  • Fixed formatting error in .github/workflows/stale.yml that caused the Mark Stale Issues action not to run

[14.4.0] - 2024-05-30

Added

  • RTD docs now includes Supplemental Guide "Archiving Output with the History diagnostics"
  • GitHub Action config file .github/workflows/stale.yml, which replaces StaleBot
  • Added git submodule HETP for aerosol thermodynamics in GEOS-Chem

Changed

  • Updated Python package versions for ReadTheDocs in docs/requirements.txt
  • Now request Python 3.12 for ReadTheDocs builds in .readthedocs.yaml
  • Updated GEOS-Chem submodule to 14.4.0
  • Updated HEMCO submodule to 3.9.0
  • Converted Github issue templates to issue forms using YAML definition files
  • Updated RTD documentation for the 14.4.0 release

Removed

  • BPCH_DIAG configuration option and related ReadTheDocs documentation
  • GitHub config files .github/stale.yml and .github/no-response.yml
  • Unused CO2 and carbon simulation options from geoschem_config.yml (and from related code in co2_mod.F90).

[14.3.1] - 2024-04-02

Added

  • GitHub action to perform compile-only integration tests

Changed

  • Updated GEOS-Chem submodule to 14.3.1
  • Updated HEMCO submodule to 3.8.1
  • Now use short submodule names (i.e. without the full path) in .gitmodules
  • Remove obsolete CH4 menu options from config file documentation

[14.3.0] - 2024-02-07

Changed

  • Updated GEOS-Chem submodule to 14.3.0
  • Updated HEMCO submodule to 3.6.0

Added

  • Added Cloud-J submodule which is the new default photolysis package used in GEOS-Chem
  • Added compile option FASTJX to use legacy FAST-JX photolysis in GEOS-Chem instead of Cloud-J
  • Added ReadTheDocs documentation for nested-grid simulations

[14.2.3] - 2023-12-01

Added

  • Script .release/changeVersionNumbers.sh to change version numbers before a new GEOS-Chem Classic release

[14.2.2] - 2023-10-23

Changed

  • Updated GEOS-Chem submodule to 14.2.2

[14.2.1] - 2023-10-10

Changed

  • test now points to src/GEOS-Chem/test
  • Updated GEOS-Chem submodule to 14.2.1
  • Updated HEMCO submodule to 3.7.1
  • Updated version numbers
  • Updated version numbers in CMakeLists.txt and docs/source/conf.py to 14.2.0

[14.2.0] - 2023-10-05

Added

  • Quick start guide for GEOS-Chem Classic in ReadTheDocs
  • Add note about WashU status downtime and link to itstatus.wustl.edu
  • Added SatDiagn to list of GEOS-Chem History collections
  • Added definitions for transport tracer properties to ReadTheDocs

Changed

  • Updated GEOS-Chem submodule to 14.2.0
  • Updated HEMCO submodule to 3.7.0
  • Updated version numbers in CMakeLists.txt and docs/source/conf.py to 14.2.0
  • Reorganize folder structure of ReadTheDocs docs/source subdirectories
  • Note that HEMCO log output is now sent to the GEOS-Chem log file
  • Updated AUTHORS.txt for version 14.2.0
  • Updated links in README.md to point to http://geos-chem.org
  • Updated logo & badge links in README.md to use HTML
  • Updated version numbers to 14.2.0

Fixed

  • Fixed typo in Intel debug option in CMakeLists.txt
  • Fixed broken link to NCO page in ReadTheDocs

Removed

  • passive_species menu in geoschem_config.rst ReadTheDocs file

[14.1.1] - 2023-03-03

Added

  • Added .github/ISSUE_TEMPLATE/config.yml file w/ Github issue options

Changed

  • Updated GEOS-Chem submodule to 14.1.1
  • Updated HEMCO submodule to 3.6.2
  • The GitHub PR template is now named ./github/PULL_REQUEST_TEMPLATE.md
  • Updated ReadTheDocs user registration documentation GEOS-Chem 14.1.1
  • Updated ReadTheDocs run directory creation information for GEOS-Chem 14.1.1
  • Updated version numbers in CMakeLists.txt and docs/source/conf.py to 14.1.1

[14.1.0] - 2023-02-01

Added

  • Added SANITIZE CMake option

Changed

  • Updated GEOS-Chem submodule to 14.1.0
  • Updated HEMCO submodule to 3.6.0
  • Updated ReadTheDocs documentation for 14.1.0

Fixed

  • Fixed logic in .github/workflows/findRefKey.sh for determing previous commit

[14.0.2] - 2022-11-29

Changed

  • Updated GEOS-Chem submodule to 14.0.2
  • Updated HEMCO submodule to 3.5.2
  • Updated the documentation for clarity

[14.0.1] - 2022-10-31

Changed

  • Updated GEOS-Chem submodule to 14.0.1

[14.0.0] - 2022-10-25

Added

  • Added files for GEOS-Chem User Manual on ReadTheDocs
  • Created CHANGELOG.md

Changed

  • Changed GEOS-Chem submodule to 14.0.0 release
  • Changed HEMCO submodule to 3.5.0 release
  • Updated CONTRIBUTING.md and SUPPORT.md to retire guidelines on GEOS-Chem wiki