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Published July 24, 2020 | Version 12.9.2
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geoschem/geos-chem: GEOS-Chem 12.9.2


GEOS-Chem 12.9.2
24 Jul 2020

This release adds fixes for several more bugs that were discovered during the 12.9.0 benchmarking phase.

  1. Fix inconsistent tagged CO2 species names in the species_database.yml file
  2. HEMCO Bug fix: Eliminate typos from HEMCO_Config.rc file that caused met field read issues for CO2 simulations
  3. Dry run bug fix: Make sure FOUND gets set properly in HEMCO gets set properly before returning
  4. Update incorrect PM2.5 definition for complexSOA_SVPOA simulations
  5. PARANOX Bug fix: Make sure that NO and NO2 are nonzero before computing FNO_NOx

Read the GEOS-Chem online manual at:

This release is compatible with GCHP. See the GCHP online manual for more information:

Learn how you can run GEOS-Chem on the Amazon Web Services cloud computing platform:


Please see the LICENSE.txt and AUTHORS.txt files in the root folder for the GEOS-Chem license description (based on the MIT license) and a complete list of authors. For more information about GEOS-Chem in general, please see and



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