GEOS-Chem 14.6.3
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This page includes information about GEOS-Chem 14.6.3. This version is a Z-release which means it causes no differences in the full-chemistry benchmark simulation using MERRA2.
GEOS-Chem 14.6.3 now officially supports the GEOS-IT meteorology product from GMAO! You may now drive your simulations with GEOS-IT meteorology.
Version overview
- This is the current stable version of GEOS-Chem
- Release date: 28 Jul 2025
| Model | GitHub Release Page | DOI |
|---|---|---|
| GEOS-Chem Classic 14.6.3 | https://github.com/geoschem/GCClassic/releases/tag/14.6.3 | 10.5281/zenodo.16541817 |
| GCHP 14.6.3 | https://github.com/geoschem/GCHP/releases/tag/14.6.3 | 10.5281/zenodo.16541830 |
Submodule updates this version
The following submodules were updated to new versions in this release.
| Submodule version | GitHub release page | DOI |
|---|---|---|
| GEOS-Chem 14.6.3 | https://github.com/geoschem/geos-chem/releases/tag/14.6.3 | 10.5281/zenodo.16538682 |
| HEMCO 3.11.2 | https://github.com/geoschem/HEMCO/releases/tag/3.11.2 | 10.5281/zenodo.16538516 |
What's new in this version
Updates that will not affect fullchem benchmark simulations
| Feature | Contributor(s) | Model scope | Notes and references |
|---|---|---|---|
| Restore missing HEMCO manual diagnostics needed for APM simulations | Bob Yantosca (Harvard) | APM Microphysics | |
| GCHP carbon simulation diagnostic fixes | Lizzie Lundgren (Harvard) | Carbon simulation | |
| Update carbon simulation restart files for 14.6.3 release | Bob Yantosca (Harvard) | Carbon simulation | |
| Fix for GEOS-Chem Classic compilation issue with GNU 14 compiler | Bob Yantosca (Harvard) | Compilation | |
| Add -DDEBUG to Intel and GNU debug compiler flags to toggle computations that should only be for debugging | Bob Yantosca (Harvard) | Compilation | |
| Update CMakeLists.txt to use mcmodel=small when compiling GEOS-Chem Classic on ARM processors | Lee Murray (Rochester) Bob Yantosca (Harvard) |
Compilation | |
| Update convection for use with met-fields generated with Grell-Freitas convection (GEOS-IT and post-2020 GEOS-FP) | Yuanjian Zhang (WashU) Viral Shah (GMAO) |
Convection | |
| Fix several additional issues in the ObsPack diagnostic | Bob Yantosca (Harvard) | Diagnostics | |
| Reorder code so that aerosol optics file paths print to dry-run log | Bob Yantosca (Harvard) | Dry-run simulation | |
| Fixes for the GCHP adjoint | Kay Suselj (JPL) | GCHP Adjoint | |
| Add operational run script sample for GCHP on AWS cloud with EFA-enabled | Yuanjian Zhang (WashU) | GCHP | |
| Add -DSANITIZE compiler option to check for memory leaks in GCHP | Lizzie Lundgren (Harvard) | GCHP | |
| Dynamically scale GCHP mass flux and courant number based on timestep | Yuanjian Zhang (WashU) | GCHP | |
| Update GEOS-IT simulations to use offline emissions generated with GEOS-IT | Yuanjian Zhang (WashU) | GEOS-IT & Run directory |
|
| Increase string length for reading lines from HEMCO standalone grid file | Melissa Sulprizio (Harvard) | HEMCO Standalone | |
| Unit conversion fix for 0th hour boundary conditions | Nicholas Balasus (Harvard) | Nested-grid simulations | |
| Eliminate some computational inefficiencies in convection and mixing | Bob Yantosca (Harvard) | Performance | |
| Update met guidance in run directory creation | Lizzie Lundgren (Harvard) | Run directory | |
| Add hidden option to read GC-Classic restart file as REAL8 not through HEMCO | Lizzie Lundgren (Harvard) | Testing |
New data directories
The following data directories have been added or updated in this version. You will have to download the directories relevant to your simulation.
| Inventory | Simulations | What was added? | Directory |
|---|---|---|---|
| Restart files | carbon |
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