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.

Some notes for the tables below:

  • Information about benchmarks can be found by following the links in the "Benchmarks" column
  • GCC = GEOS-Chem "Classic" (uses OpenMP parallelization single node only)
  • GCHP = GEOS-Chem High Performance (uses MPI parallelization across multiple nodes)
  • DOI = digital object identifier, can be used to reference individual GEOS-Chem versions in publications

GEOS-Chem 12 release series

Manual pages for the GEOS-chem 12 release series:

Version Released Important features Benchmarks DOI
12.8.2 27 May 2020 Bug fixes and updates for WRF-GC development: 10.5281/zenodo.3860693
12.8.1 21 May 2020 Fixes for several issues identified during 12.8.0 benchmarking (not affecting full-chemistry simulations): 10.5281/zenodo.3837666
12.8.0 04 May 2020 10.5281/zenodo.3784796
12.7.2 09 Mar 2020 Contains several bug fixes: 10.5281/zenodo.3701669
12.7.1 03 Feb 2020 Contains several bug fixes: 10.5281/zenodo.3676008
12.7.0 03 Feb 2020 Contains several science updates and bug fixes: 10.5281/zenodo.3634864
12.6.3 25 Nov 2019 Contains GCHP bug fixes only: See: 10.5281/zenodo.3552959
12.6.2 15 Nov 2019 Contains several bug fixes. See: 10.5281/zenodo.3543702
12.6.1 28 Oct 2019 Contains several bug fixes. See: 10.5281/zenodo.3520966
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
10.5281/zenodo.3507501
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
10.5281/zenodo.3403111
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.

10.5281/zenodo.3360635
12.3.2 02 May 2019 This is an unofficial benchmark and the first GCHP benchmark using GCPy 10.5281/zenodo.2658178
12.3.1 08 Apr 2019 10.5281/zenodo.2633278


12.3.0 01 Apr 2019 This is the first benchmark to utilize GCPy 10.5281/zenodo.2620535
12.2.1 28 Feb 2019 10.5281/zenodo.2580198
12.2.0 19 Feb 2019 1st version to have the new Transport Tracer benchmark (replaces Rn-Pb-Be benchmark) 10.5281/zenodo.2572887
12.1.1 13 Dec 2018 10.5281/zenodo.2249246
12.1.0 26 Nov 2018 10.5281/zenodo.1553349


12.0.3 16 Oct 2018 10.5281/zenodo.1464210
12.0.2 10 Oct 2018 10.5281/zenodo.1455215
12.0.1 24 Aug 2018 10.5281/zenodo.1403144
12.0.0*
aka v11-02-final
10 Aug 2018
  • Bug fixes identified during the v11-02 release candidate period
Note change in GEOS-Chem version numbering system 10.5281/zenodo.1343547

GEOS-Chem 11 release series

Version Date released Important features Benchmarks 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 Benchmarks Documentation
v10-01 01 May 2015 (provisional)
17 Jun 2015 (public)

GEOS-Chem 9 release series

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

GEOS-Chem 7 release series

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

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 GEOS-Chem 1-year benchmark simulations through version 12.8.0 (released 04 May 2020). 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 12.8.0.png

For more information, please see our Evolution of mean OH in GEOS-Chem wiki documentation.

--Bob Yantosca (talk) 15:41, 27 May 2020 (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)