Downloading GEOS-Chem data directories

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  1. Minimum system requirements
  2. Downloading source code
  3. Downloading data directories
  4. Creating run directories
  5. Configuring runs
  6. Compiling
  7. Running
  8. Output files
  9. Visualizing and processing output
  10. Coding and debugging
  11. Further reading

This page describes where you can obtain the GEOS-Chem source code and required data files.


In addition to the files contained in the run directories, GEOS-Chem also needs to access data directories containing:

  • Meteorological data (a.k.a. the "met fields) used to drive GEOS–Chem
  • Emissions inventories used by GEOS-Chem
  • Scale factors used to scale emissions from a base year to a given year
  • Sample restart files that you can use to spin up your GEOS-Chem simulations
  • Oxidant (OH, O3) concentrations for both full-chemistry and offline simulations
  • Other GEOS–Chem specific data files.

These files are often too large to store in a single user's disk space. Therefore, they are meant to be stored in shared disk space where all GEOS-Chem users in your group can have access to them.

Shared data directory archives

The GEOS–Chem shared data directories may be downloaded from the following locations:

Archive Location Description How to download?
Compute Canada This is the main GEOS-Chem data archive.
  • Use this archive to download data to your local computer system.
  1. GEOS-Chem dry-run
    • Our preferred method
    • Available in 12.7.0 or later
  2. or by manual download
Amazon Web Services S3 storage s3://gcgrid This is an AWS S3 bucket containing a mirror of the Harvard University storage server. It will not contain the complete record of met fields, but additional data may be added by submitting a request to the GCST.

See our cloud computing tutorial ( for more information.

  • Use this archive for download data to your AWS cloud instance.
  • NOTE: Downloading data from this archive to your local computer system will incur an egress fee. Use with caution!
  1. GEOS-Chem dry-run
    • Our preferred method
    • Available in 12.7.0 or later
  2. or by manual download

--Bob Yantosca (talk) 18:09, 13 December 2019 (UTC)

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