GEOS-Chem 13.2.0

GEOS-Chem Versions Page

This page includes information about GEOS-Chem 13.2.0 which is currently in development.

Version overview

The following items have been added to GEOS-Chem 13.2.0 since the last benchmark for GEOS-Chem 13.1.0. See also the 13.2.0 milestone on Github.

Feature	Contributor(s)	Model scope	Notes
Updates that will affect full-chemistry simulations
CEDS v2 emissions through 2019	Patrick Campbell (NOAA-ARL) Melissa Sulprizio (GCST)	Emissions	See geoschem/geos-chem #757
Updated Yuan/BNU MODIS LAI product (2000-2019)	Jenny Fisher (U. Wollongong) Melissa Sulprizio (GCST)	Emissions Dry deposition	See geoschem/geos-chem #717
Improved wet scavenging from Luo et al. (2020) (as option)	Gan Luo (Albany) Fangqun Yu (Albany) Bob Yantosca (GCST)	Wet deposition	See geoschem/geos-chem #779 These updates will replace the Luo et al. (2019) option IMPORTANT NOTE: Some small differences at the level of numerical noise (i.e. differences ~1e-6X or ~1e-7X smaller than values) will still occur even when the default wetdep scheme is used. This is because we now better enforce REAL*8 precision by adding _fp or _f8 suffixes to numerical constants where they were lacking in both Luo and default wetdep schemes.
Blowing snow emissions of sea salt and sea salt bromide	Lyatt Jaegle (UW) Lizzie Lundgren (GCST)	Emissions	See geoschem/geos-chem #356
Bug fixes: Add carbon to species scale factors to AEIC VOC emissions Fix molecular weight of ethanol (EOH) in species_database.yml Fix typo in CloudHet function in gckpp_HetRates.F90	Christoph Keller (GMAO) Viral Shah (Harvard)	Emissions (1,2) Chemistry (3)	See geoschem/geos-chem #776 (1,2) See geoschem/geos-chem #743 (3)
Updates that will NOT affect full-chemistry simulations
ObsPack pressure units are now in Pa instead of hPa	Eloise Marais (Birmingham)	Diagnostics	See geoschem/geos-chem #747
Add lon & lat bounds to GEOS-Chem Classic History output	Chris Holmes (FSU)	Diagnostics	See geoschem/geos-chem #774
Trace metal simulation	Junwei Xu (Dalhousie) Bob Yantosca (GCST)	Specialty simulation	See geoschem/geos-chem #769 Daily data files are very large; we have compressed some. Added trace metal species as a standalone simulation, so as not to burden other simulations with large data I/O
Features only affecting GCHP:
Set lev positive 'up' for all diagnostic files except Emissions	Lizzie Lundgren (GCST)	Output	See geoschem/MAPL PR #10 See geoschem/GCHP issue #112

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	Type	What was added?	Directory
CEDS	Default	CEDS v2 emissions through 2019	HEMCO/CEDS/v2021-06
Yuan-processed MODIS LAI	Default	Updated BNU v6/Yuan-processed MODIS LAI product (2000-2020)	HEMCO/Yuan_XLAI/v2021-06
TRACE_METALS	Optional	Canadian (CAC) and US (NATA) emissions (2011-2013) for the trace metals specialty simulation	HEMCO/TRACE_METALS/v2021-06
MULTI_ICE	Default	Multi-year sea ice fraction for blowing snow from sea salt aerosol	HEMCO/MULTI_ICE/v2021-07

1-month benchmarks

This version will require 1-month full-chemistry benchmarks, with and without Luo wet deposition.

1-year benchmarks

This version will require 1-year full-chemistry and transport tracer benchmarks, with and without Luo wet deposition.