This is a prerelease of the GEOS-Chem Classic user guide. These pages are still a work in progress.
Contributions (e.g., suggestions, edits, revisions) would be greatly appreciated. See editing this guide and our contributing guidelines. If you find a something hard to understand—let us know!
This site provides instructions for GEOS-Chem Classic, the single-node mode of operation of the GEOS-Chem model. We provide instruction for downloading and compiling GEOS-Chem Classic, plus its required software libraries.
GEOS-Chem is a global 3-D model of atmospheric composition driven by assimilated meteorological observations from the Goddard Earth Observing System (GEOS) of the NASA Global Modeling and Assimilation Office. It is applied by research groups around the world to a wide range of atmospheric composition problems.
Cloning and building from source code ensures you will have direct access to the latest available versions of GEOS-Chem CLassic, provides additional compile-time options, and allows you to make your own modifications to GEOS-Chem Classic source code.
- Quick start
- Hardware requirements
- Computer system
- Memory requirements
- Disk space
- Software requirements
- Key references
- Configure your computational environment
- Download source code
- GEOS-Chem Classic source code repositories
- Download instructions
- For more information
- Create a run directory
- Compiling GEOS-Chem
- Use CMake to configure and build GEOS-Chem
- Compile GEOS-Chem
- How do I make clean?
- Download data with a dry-run simulation
- What is a dry-run simulation?
- How to perform a GEOS-Chem Classic dry-run
- Download data from dry-run output
- HEMCO diagnostics
- History diagnostics
- ObsPack diagnostic
- Planeflight diagnostic
- GEOS-Chem Classic folder tree
- Sample GEOS-Chem run scripts
- Load required libraries for GEOS-Chem
- Build libraries for GEOS-Chem with Spack
- Initial Spack setup
- Build the GCC 10.2.0 compilers
- Install required libraries for GEOS-Chem
- Installing optional packages
- Loading Spack packages at startup
- Using netCDF with GEOS-Chem
- Video tutorials