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Chemistry and Aerosol","monthly_downloads":0,"total_dependent_repos":0,"total_dependent_packages":0,"readme":"[![Release](https://img.shields.io/github/v/release/geoschem/geos-chem?label=Latest%20Release)](http://wiki.geos-chem.org/GEOS-Chem_versions)\n[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.1343546.svg)](https://doi.org/10.5281/zenodo.1343546)\n[![License](https://img.shields.io/badge/License-MIT-blue.svg)](https://github.com/geoschem/geos-chem/blob/master/LICENSE.txt)\n\n## Description\n\nThis repository contains the __GEOS-Chem science codebase__.  Included in this repository are:\n\n  * The source code for GEOS-Chem science routines;\n  * Scripts to create GEOS-Chem run directories;\n  * Template configuration files that specify run-time options;\n  * Scripts to run GEOS-Chem tests;\n  * Driver routines (e.g. `main.F90`) that enable GEOS-Chem to be run in several different implementations (as GEOS-Chem \"Classic\", as GCHP, etc.)\n\n### Version 12.9.3 and prior\n\nGEOS-Chem 12.9.3 was the last version in which this \"Science Codebase\" repository was used in a standalone manner.\n\n### Version 13.0.0 and later\n\nGEOS-Chem 13.0.0 and later versions use this \"Science Codebase\" repository as a  submodule within the [GCClassic](https://github.com/geoschem/GCClassic) and [GCHP](https://github.com/geoschem/GCHP) repositories.\n\nReleases for GEOS-Chem 13.0.0 and later versions will be issued at the [GCClassic](https://github.com/geoschem/GCClassic) and [GCHP](https://github.com/geoschem/GCHP) Github repositories. We will also tag and release the corresponding versions at this repository for the sake of completeness.\n\n## User Manuals\n\nEach implementation of GEOS-Chem has its own manual page.  For more information, please see:\n\n* __GEOS-Chem \"Classic\":__ [https://geos-chem.readthedocs.io](https://geos-chem.readthedocs.io)\n\n* __GCHP:__ [https://gchp.readthedocs.io](https://gchp.readthedocs.io)\n\n* __WRF-GC:__ [http://wrf.geos-chem.org](http:/wrf.geos-chem.org)\n\n* __Other documentation:__ [View related documentation @ Read TheDocs](https://geos-chem.readthedocs.io/en/latest/geos-chem-shared-docs/supplemental-guides/related-docs.html)\n\n## About GEOS-Chem\n\nGEOS-Chem is a global 3-D model of atmospheric chemistry driven by meteorological input from the Goddard Earth Observing System (GEOS) of the [NASA Global Modeling and Assimilation Office](http://gmao.gsfc.nasa.gov/). 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