GEOS-Chem 14.0.0

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GEOS-Chem Versions Page

This page includes information about GEOS-Chem 14.0.0 (currently under development).

Version overview

The following items have been added to GEOS-Chem 14.0.0 since the last GEOS-Chem version GEOS-Chem 13.4.0. Also see the following Github pages:

Feature Contributor(s) Model scope Notes and references
Updates that will affect full-chemistry benchmark simulations
Add several fixes to remove GCHP differences when splitting up simulations Lizzie Lundgren (GCST) Initialization
  • geoschem/geos-chem PR #1229
  • GCHP fullchem simulations now identical if broken up in time
  • Differences in GCClassic persist due to I/O precision limitation of HEMCO
Remove unnecessary met-fields from GCClassic restart file that caused incorrect initial meteorology Lizzie Lundgren (GCST) Restart files
Updates that will NOT affect full-chemistry benchmark simulations
Convert input.geos to geoschem_config.yml Bob Yantosca (GCST) Input files
Change 4D State_Chm%Species array to vector of 3D concentration arrays Lizzie Lundgren (GCST) Structural
Updates that will only affect GCHP
Upgrade GMAO libraries in GCHP Liam Bindle (GCST)
Lizzie Lundgren (GCST) 		Structural
Bug fixes for MEGAN HEMCO extension Lizzie Lundgren (GCST) Emissions

New data directories

The following data directories have been added or updated in this version. You will have to download the directories relevant to your simulation.

Inventory Simulations What was added? Directory
None yet

1-month full-chemistry benchmarks

1-month benchmark setup

The following table describes the GEOS-Chem setup for both GEOS-Chem Classic and GCHP 1-month benchmark simulations.

Git tag(s):
  • GEOS-Chem Classic: TBD
  • GCHP: TBD
  • HEMCO: TBD
Compared to previous benchmark: 13.4.0
Software environment: gcc 10.2.0
OpenMPI 4.1.0
netcdf-fortran 4.5.3
CMake 3.17.3
ESMF 8.0.1
Model resolution:
  • GEOS-Chem Classic: 4° x 5°
  • GCHP: c24
Meteorology fields: MERRA-2
  • GEOS-Chem Classic: 4° x 5°
  • GCHP: 0.5° x 0.625°
Initial conditions: July 1, 2019
  • NOTE: GCHP c48 restart file regridded from GEOS-Chem Classic 4° x 5°
Benchmark month: July 2019
Emissions setup: TBD
Chemistry setup: TBD
This version will impact:
(select all that apply with boldface)
  • Emissions
  • Photolysis
  • Chemistry
  • Dry Deposition
  • Wet Deposition
  • Advection
  • BL Mixing
  • Convection
  • Meteorology Fields
  • Other (please specify):

1-month internal benchmarks

Each update that will introduce a significant change in the full-chemistry simulation is tagged with an alpha version in Git. For each of these alpha versions, the GCST runs an internal 1-month benchmark simulation to isolate the impact from that update.

For more details on the update(s) included in each alpha version and a link to benchmark results, see this Google sheet.

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