GEOS-Chem 14.3.0

GEOS-Chem Versions Page

This page includes information about GEOS-Chem 14.3.0. The GEOS-Chem model development priorities page lists additional developments that may be added.

Version overview

This version is currently in development

Repository	GitHub Milestone	DOI
GCClassic 14.3.0	14.3.0 milestone for geoschem/GCClassic	TBD
GCHP 14.3.0	14.3.0 milestone for geoschem/GCHP	TBD
GEOS-Chem (science codebase) 14.3.0	14.3.0 milestone for geoschem/geos-chem	TBD
HEMCO 3.8.0	3.8.0 milestone for geoschem/HEMCO	TBD

What's new in this version

Updates that will affect full-chemistry benchmark simulations

Feature	Contributor(s)	Model scope	Notes and references
Update reactions with new JPL & IUPAC recommendations	Kelvin Bates (NOAA CSL)	Chemistry	geos-chem PR #1765 Bates, K.H., et al., submitted to Geophys. Model Dev., 2023.
Interim fix for runaway HMS chemistry	Sebastian Eastham (MIT)	Chemistry	geos-chem PR #2006
Cloud-J for computing photolysis rates as default	Lizzie Lundgren (Harvard)	Photolysis	Fast-JX is still available as a build option geos-chem PR #1848 gcclassic PR #27 gchp PR #356
Fix bugs setting strat aerosol OD passed to Fast-JX	Lizzie Lundgren (Harvard)	Photolysis	geos-chem PR #2018
Bug fix for dry deposition to snow and ice	Ryan Pound (York)	Dry deposition	geos-chem PR #2045
Bug fix for application of FRSNO in land cover arrays	Ryan Pound (York)	Dry deposition	geos-chem PR #2046
TOMAS in GCHP	Betty Croft (Dalhousie)	TOMAS	GCHP PR #359 geos-chem PR #2060 HEMCO PR #250 Dummy species added to the chemistry mechanism cause numerical differences

Updates that will NOT affect full-chemistry benchmark simulations

Feature	Contributor(s)	Model scope	Notes and references
Updates that will NOT affect full-chemistry benchmark simulations
Bug fix for TOMAS sulfate production rates	Betty Croft (Dalhousie)	TOMAS	geos-chem PR #1569

Updates that will only affect GCHP

Feature	Contributor(s)	Model scope	Notes and references
TBD

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
Cloud-J look-up tables	fullchem, aerosol-only, Hg	Cloud-J is the new default photolysis option Fast-JX is still recommended for Hg simulations pending further work (build with -DFASTJX=y)	ExtData/CHEM_INPUTS/CLOUD-J/v2023-05 ExtData/CHEM_INPUTS/CLOUD-J/v2023-11-Hg
RRTMG	RRTMG (GCHP only)	Changed seconds in time units string from 0.0 to 00 Files will need to be re-downloaded	ExtData/HEMCO/RRTMG/v2018-11