GEOS-Chem versions

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Here we have posted links to a separate wiki page describing each GEOS-Chem model version.

GEOS-Chem development history

In the table below, we list information about current and past GEOS-Chem releases. For information about upcoming releases, please visit our GEOS-Chem model development priorities wiki page.

NOTE: Information about benchmarks can be found by following the links to each GEOS-Chem version.

GEOS-Chem 12 release series

Version Date released Important features Documentation
12.6.3 25 Nov 2019 Contains GCHP bug fixes only: See:
12.6.2 15 Nov 2019 Contains several bug fixes. See:
12.6.1 28 Oct 2019 Contains several bug fixes. See:
12.6.0 18 Oct 2019
  • Hetchem updates and subgrid cloud NOy chemistry
  • HNO3 cold-temperature deposition
  • Quick fix for aerosol pH calculation when dry
  • Remove isoprene in VBS (leaving aqueous)
  • Updated aerosol hygroscopicity and optics
  • Various structural updates
  • Subsetting in netCDF diagnostics
  • Diagnostic for O3 at 10m (or other height) above surface
12.5.0 09 Sep 2019
  • Retire obsolete emissions inventories
  • Fixes and updates for offline biogenic VOC and volcano emissions
  • Update GCHP to use MAPL v1.0.0 and ESMF v8.0.0 beta snapshot 28
12.4.0 05 Aug 2019
  • Grid-independent emissions
  • FlexGrid Stage 2: define custom grids

NOTE: Users should use 12.5.0 instead. That version contains bug fixes and updates for offline biogenic VOC and volcano emissions.

12.3.2 02 May 2019
12.3.1 08 Apr 2019
12.3.0 01 Apr 2019
12.2.1 28 Feb 2019
12.2.0 19 Feb 2019
12.1.1 13 Dec 2018
12.1.0 26 Nov 2018
12.0.3 16 Oct 2018
12.0.2 10 Oct 2018
12.0.1 24 Aug 2018
12.0.0*
aka v11-02-final

*Note the switch in version numbering system
10 Aug 2018
  • Bug fixes identified during the v11-02 release candidate period

GEOS-Chem 11 release series

Version Date released Important features Documentation
v11-02-rc 22 Jun 2018
v11-01 20 Dec 2016 (provisional)
01 Feb 2017 (public)

GEOS-Chem 10 release series

Version Date released Important features Documentation


v10-01 01 May 2015 (provisional)
17 Jun 2015 (public)

GEOS-Chem 9 release series

Version Date released Important features Documentation
v9-02 17 Jan 2014 (provisional)
03 Mar 2014 (public)
v9-01-03 14 Sep 2012
v9-01-02 28 Nov 2011
v9-01-01 07 Jun 2011

GEOS-Chem 8 release series

Version Date released Important features Documentation
v8-03-02 07 Sep 2010 Updated Hg and CO2 simulations
v8-03-01 04 May 2010
  • ISORROPIA II
  • TOMAS microphysics option
  • Updates to SOA and photolysis
v8-02-04 24 Feb 2010
  • LINOZ strat chemistry
  • NEI2005 anthro emissions
  • MEGAN v2.1 biogenic emissions
v8-02-03 Oct 2009
  • KPP solver
  • ICOADS emissions
  • Updated makefile structure
v8-02-02 08 Jun 2009
  • Non-local PBL mixing scheme
  • Updated Bond BC & OC emissions
v8-02-01 26 May 2009
  • Updated chemistry & photolysis reactions
  • Glyoxal chemistry mechanism
v8-01-04 10 Mar 2009
  • Various emissions updates (regional & global inventories)
  • GFED2 biomass emissions updates
v8-01-03 Dec 2008
  • Installation of GMI TPCORE routine
v8-01-02 Nov 2008
  • Nested grid simulations for 0.5° x 0.666°
v8-01-01 May 2008
  • Capability to run with GEOS-5 met fields

GEOS-Chem 7 release series

Version Date released Important features Documentation
v7-04-13 Nov 2007
  • H2/HD simulation
  • Bug fixes in SMVGEAR, lightning, and dynamic tropopause
v7-04-12 Oct 2007
  • Introduction of dynamic tropopause
v7-04-11 and earlier March 2006 and earlier

NOTE: For information about 1-year benchmark simulations for GEOS-Chem v8-02-04 and earlier, see this website.

--Melissa Sulprizio (talk) 16:02, 10 August 2018 (UTC)
--Bob Yantosca (talk) 15:11, 15 March 2019 (UTC)

Mean OH from GEOS-Chem 1-year benchmark simulations

Here is a plot of the mean OH concentration from several recent GEOS–Chem 1-year benchmark simulations. The mean OH is an indicator how the chemistry mechanism is performing. Typical values are 10–12 x 105 molecules cm-1.

GC Mean OH 12.0.0.png

--Bob Yantosca (talk) 18:16, 10 August 2018 (UTC)

Global burden history

Please see our Global burden history wiki page to view the global burdens for several species from several recent GEOS-Chem 1-year benchmark simulations.

--Bob Y. (talk) 19:32, 9 November 2015 (UTC)

GEOS–Chem Benchmarking Procedure

For a complete description about the the standard 1-month and 1-year benchmark simulations, please see our GEOS-Chem Benchmarking wiki page.

--Bob Y. 15:47, 30 April 2015 (EDT)

GEOS-Chem Benchmark Performance

For an overview of GEOS-Chem 1-month benchmark timing results, please see our GEOS-Chem 1-month benchmark timing results wiki page.

--Melissa Sulprizio (talk) 13:59, 20 September 2018 (UTC)