GEOS-Chem 14.5.0

Version overview

This version is currently in development

Model	GitHub Release Page	DOI
GEOS-Chem Classic 14.5.0	TBD	TBD
GCHP 14.5.0	TBD	TBD

Submodule updates this version

The following submodules were updated to new versions in this release.

Submodule version	GitHub release page	DOI
GEOS-Chem 14.5.0	TBD	TBD
HEMCO 3.10.0	TBD	TBD
Cloud-J 8.0.1	https://github.com/geoschem/Cloud-J/releases/tag/8.0.1	10.5281/zenodo.13862693

What's new in this version

Updates that will affect full-chemistry benchmark simulations

Feature	Contributor(s)	Model scope	Notes and references
Pass non-zero Ca2, Mg, and K cations to HETP; Update dry mass fractions accordingly	Becky Alexander (UW) Lizzie Lundgren (Harvard)	Aerosols	geos-chem PR #2398 geos-chem PR #2467 geos-chem PR #2489
Allow per-species definition of KPP absolute and relative solver tolerances; Set absolute tolerances of dummy species to large value	Obin Sturm (USC) Bob Yantosca (Harvard)	Chemistry	geos-chem PR #2359
Fix bugs in PDER, OCPISOA and TotalOC in complexSOA	Yuanjian Zhang (WashU)	Chemistry	geos-chem PR #2315
Add fixes for ALK4 and R4N2 chemistry from Brewer et al. (2023, JGR)	Jared Brewer (UMN)	Chemistry	geos-chem PR #2352 Brewer, J.F. et al. JGR (2023)
Chemistry for RCOOH, monoterpenes, new PNs and ANs from Travis et al. (2024)	Katie Travis (JPL)	Chemistry	geos-chem PR #2318 Travis, K.T., et al. EGUsphere (2024)
Adding PPN photolysis	Bex Horner (UCL)	Chemistry	geos-chem PR #2371 Horner et al., EGUsphere (2024)
Cloud-J v8.0 including UV H2O absorption	Lizzie Lundgren (Harvard) Michael Prather (UCI)	Cloud-J submodule	Cloud-J PR #24 geos-chem PR #2424 Dataset Prather and Zhu (2024)
Restore dry deposition output in GCHP & GCClassic fullchem benchmark simulations	Bob Yantosca (Harvard)	Diagnostics	geos-chem PR #2144
Remove J-value diagnostics which are all zero	Bob Yantosca (Harvard)	Diagnostics	geos-chem PR #2464 geos-chem PR #2457
Add emission factors for ALK6, C4H6, EBZ, STYR, TMB emissions in GFED and FINN biomass burning	Kelvin Bates (Colorado)	Emissions	HEMCO PR #285
Fix mass non-conservation in VDIFF PBL mixing	Nick Balasus (Harvard)	PBL mixing	geos-chem PR #2428

Updates that will NOT affect full-chemistry benchmark simulations

Feature	Contributor(s)	Model scope	Notes and references
Updated soil NOx scheme from Y. Wang et al (2021), as an option	Yi Wang (Iowa) Jun Wang (Iowa)	Emissions	geos-chem PR #2430 geos-chem issue #1288 Incorporates new met field TSOIL1
Update GFED4_Climatology entries for period 2010-2023 with new species	Bob Yantosca (Harvard)	Emissions	geos-chem PR #2436
CH4 simulation fixes, including Apply seasonality to CH4 hydropower reservoir emissions Prevent double counting agricultural burning emissions	Melissa Sulprizio (Harvard)	Carbon/CH4 simulation	geos-chem PR #2473 geos-chem PR #2477
Carbon simulation fixes in GCHP	Lizzie Lundgren (Harvard)	Carbon simulation	GCHP issue #430 geos-chem PR #430 MAPL PR #37
Fix pressure handling in HEMCO standalone	Bob Yantosca (Harvard)	HEMCO standalone	HEMCO PR #284 HEMCO issue #277
Update run scripts and environment files for NASA discover cluster	Lizzie Lundgren (Harvard)	NASA Discover	geos-chem PR #2439
Move aerosol optics files to CHEM_INPUTS/Aerosol_Optics/ directory tree	Lizzie Lundgren (Harvard)	Structural	HEMCO issue #2426

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
Aerosol optics	aerosol-only fullchem	Configuration files (brc.dat, dust.dat, h2so4.dat, org.dat, so4.dat, soot.dat, ssa.dat, ssc.dat containing optical properties were copied here. Used for computing AOD.	ExtData/CHEM_INPUTS/Aerosol_Optics/2024-08/
GFED4 climatology	fullchem	Climatology and monthly-mean emissions for period 2010-2023, with species that were added in 14.5.0, namely: GFED4_climatology_2010-2023_05x0625.nc GFED4_monmean_05x0625_2010-2023.nc	ExtData/HEMCO/GFED4/v2023-03/
Cloud-J inputs	fullchem	Copy of v2023-05 with H2O UV absorption cross-sections added, species PPN added, and aerosol dat-files used for computing AOD in GEOS-Chem removed.	ExtData/CHEM_INPUTS/CLOUD_J/2024-09/
Restart files	fullchem	Restart files with new species in the 14.5.0 chemistry mechanism (taken from the 1-yr benchmark)	TBD

Species changes

Summary

Species metric	14.4.0	14.5.0	Change	% Change
Total # species	311	372	+61	19.6
# advected	222	265	+43	19.4
# dry deposited	160	198	+38	23.8
# wet deposited	144	181	+37	25.7
# photolyzed	140	160	+20	14.3

Species Added

Name	Formula	Fullname	Advected	Dry deposited	Gas	Photolyzed	Wet deposited
ACO3	C3H3O3	Peroxyacetyl radical for APAN			X
ACR	C3H3O	Acrolein	X	X	X	X
ACRO2	C3H5O4	Peroxy radical from ACR			X
ALK4N1	C4H8NO5	Peroxy radical from ALK4N2			X
ALK4N2	RO2NO	Lumped alkyl nitrate from ALK4	X	X	X	X	X
ALK4O2	C4H9O2	Peroxy radical from ALK4			X
ALK4P	CH3CH2CH2CH2OOH	Peroxide from ALK4O2	X	X	X	X	X
ALK6	C7H16	Lumped >= C6 Alkanes			X
APAN	C3H3NO5	Peroxyacryloyl nitrate	X	X	X	X	X
APINN	C10H17NO4	1st gen organic nitrate from APIN	X	X	X	X	X
APINO2	C10H17O3	Peroxy radical from APIN			X
APINP	C10H18O3	Hydroperoxide from APIN	X	X	X		X
AROMCHO	C5H6O4	ACCOMECHO from MCM	X	X	X		X
AROMCO3	C5H5O6	Lumped aromatic peroxyacetyl radical			X
AROMPN	C5H5NO8	Lumped PN from aromatics	X	X	X	X	X
BPINN	C10H17NO4	Saturated 1st gen BPIN organic nitrate	X	X	X	X	X
BPINO	C9H14O	Ketone from BPIN	X	X	X		X
BPINO2	C10H17O3	Peroxy radical from BPIN			X
BPINON	C9H13NO4	Saturated 2nd gen BPIN organic nitrate	X	X	X	X	X
BPINOO2	C10H17O3	2nd-gen peroxy radical from BPIN			X
BPINOOH	C9H14O3	2nd-gen peroxide from BPIN	X	X	X		X
BPINP	C10H18O3	Peroxide from BPIN	X	X	X		X
BUTN	C4H7NO4	C4H6 alkyl nitrate	X	X	X	X	X
BUTO2	C4H7O3	peroxy radical from C4H6			X
C4H6	C4H6	1,3-butadiene	X		X
C96N	C9H15NO	Saturated 2nd gen monoterpene organic nitrate	X	X	X	X	X
C96O2	C10H17O3	2nd-gen peroxy radical from APIN			X
C96O2H	C9H16O3	Peroxide from APIN 2nd gen	X	X	X		X
EBZ	C8H10	Ethylbenzene	X		X
GCO3	HOCH2CO3	Peroxyacetyl radical for PHAN			X
HACTA	HOCH2CO2H	Hydroxyacetic/glycolic acid	X	X	X		X
LIMAL	C10H16O2	Aldehyde from limonene	X	X	X		X
LIMKB	C10H16O3	2nd gen ketone from limonene	X	X	X		X
LIMKET	C10H16O2	Ketone from limonene	X	X	X		X
LIMKO2	C10H17O3	2nd-gen peroxy radical from LIMO			X
LIMN	C10H17NO4	Saturated 1st gen limonene organic nitrate	X	X	X	X	X
LIMNB	C10H15NO4	Saturated 1st gen LIMO organic nitrate	X	X	X	X	X
LIMO2H	C10H18O3	Acid from LIMO	X	X	X		X
LIMO3	C10H17O3	Acylperoxy radical from LIMO			X
LIMO3H	C10H18O4	Peracid from LIMO	X	X	X		X
LIMPAN	C10H17NO4	PAN from LIMO	X	X	X	X	X
MEKCO3	C3H5O4				X
MEKPN	C3H5NO6	MEK peroxyacetyl nitrate	X	X	X	X	X
MYRCO	C10H18O3	Aldehyde or ketone from myrcene	X	X	X		X
PHAN	C2H3NO6	Peroxyhydroxyacetic nitric anhydride	X	X	X	X	X
PIN	C10H17NO4	Saturated 1st gen monoterpene organic nitrate	X	X	X	X	X
PINAL	C10H16O2	Pinonaldehyde	X	X	X		X
PINO3	C10H17O3	Acylperoxy radical from APIN			X
PINO3H	C10H18O4	Pinonic peracid	X	X	X		X
PINONIC	C10H18O3	Pinonic acid	X	X	X		X
PINPAN	C10H17NO4	PAN from pinonaldehyde	X	X	X	X	X
R7N1	C7H15NO5	Peroxy radical from R7N2			X
R7N2	RO2NO	C7 Lumped alkyl nitrate	X	X	X	X	X
R7O2	C7H15O2	Peroxy radical from ALK6			X
R7P	C7H16O2	Peroxide from R7O2	X	X	X	X	X
RNO3	RO2NO	Lumped aromatic nitrate	X	X	X	X	X
STYR	Styrene		X		X
TLFUO2	C5H7O5				X
TLFUONE	C5H6O2	Aromatic furanones	X	X	X		X
TMB	C8H10	Trimethylbenzenes			X
ZRO2	C7H9O5	RO2 for making lumped aromatic nitrate			X

Species Changed

Green indicates feature added and red indicates feature removed.

Name	Formula	Fullname	Advected	Dry deposited	Gas	Photolyzed	Wet deposited
PPN	CH3CH2C(O)OONO2	Lumped peroxypropionyl nitrate	X	X	X	X	X
RCOOH	C2H5C(O)OH	> C2 organic acids	X	X	X		X

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: 14.5.0-rc.0 (aka 14.5.0-alpha.17) GCHP: 14.5.0-rc.0 (aka 14.5.0-alpha.17) HEMCO: 3.10.0-rc.0 Cloud-J: 8.0.1
Compared to previous benchmark:	14.4.3
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 c24 restart file regridded from GEOS-Chem Classic 4° x 5°
Benchmark month:	July 2019
Chemistry setup:	Mechanism: See fullchem.eqn Benchmark categories: See benchmark_categories.yml Lumped species: See lumped_species.yml
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): Aerosol thermodynamics, Aerosol Optics

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.

1-month benchmark assessment form

Performance	GEOS-Chem Classic	GCHP
Grid resolution:	4° x 5°	C24
# CPUs, nodes:	62 CPUs 1 node (AWS)	62 CPUs 1 nodes (AWS)
Wall time:	06:31	07:06
Memory	12.8 GB	42.0 GB
Global mean OH: (% change from previous version)	13.33666788319 x 105 molec/cm3 (-1.78%)	13.32845877318 x 105 molec/cm3 (-1.78%)
Methyl chloroform lifetime: (% change from previous version)	4.670082 years (3.22%)	4.648456 years (3.24%)
Methane lifetime: (% change from previous version)	7.884014 years (3.37%)	7.843387 years (3.38%)
Details
Species, J-Values, and COLUMN AOD values that changed by 10% or more at the surface:	GEOS-Chem Classic 14.4.3 vs 14.5.0	GCHP 14.4.3 vs 14.5.0
Species and J-Values that changed by 10% or more at 500 hPa:	GEOS-Chem Classic 14.4.3 vs 14.5.0	GCHP 14.4.0 vs 14.5.0
Species and J-Values that changed by 10% or more in zonal mean:	GEOS-Chem Classic 14.4.3 vs 14.5.0	GCHP 14.4.3 vs 14.5.0
Emissions that changed by 10% or more:	GEOS-Chem Classic 14.4.3 vs 14.5.0	GCHP 14.4.3 vs 14.5.0
Overview
Below we summarize the notable changes caused by specific updates. See also the internal benchmark results which isolate impacts from specific updates. 1. Allow per-species definition of KPP absolute and relative solver tolerances; Set absolute tolerances of dummy species to large value Also includes hotfix from PR #2363, merged up. Differences are at the level of numerical noise. 2. Fix bugs in PDER, OCPISOA and TotalOC in complexSOA Mean OH changed by +0.11%. Very small changes in NO Fert, ship, and soil emissions (maybe due to PARANOx). Complex_SOA shows small increases in most locations, particularly off the coast of South America, over the Arabian peninsula, and at polar latitudes... but ratios are between 0.99 and 1.01. Column AOD for SOA increases everywhere but especially in the Pacific between Mexico and Hawaii... Maximum change is 1.05X. Total column AOD shows slight decreases (to 0.99X) 3. Pass non-zero Ca2, Mg, and K cations to HETP #2398 Mean OH increases by 0.45%. No change in emissions. O3 conc at sfc increases by up to ~1ppb. OH increases slightly at surface, most pronounced in tropical regions, up to 1e-6 molec/cm3. NOx at surface follows the OH pattern. Column AOD for SO4 show small increases (< 10%) near the equator and decreases at about 40S. Column AOD from ISOA shows small decreases by up to 0.005X over continents. All other column AOD changes are zero or negligible. Halogen zonal mean plots show small changes in general. Cly at surface decreases up to 15% over oceans with small increases over continents. Bry at surface shows ~10% decreases at 30-40S, with up to 10% increases in the tropics (esp. the E Pacific). 4. Add fixes for ALK4 and R4N2 chemistry from Brewer et al. (2023, JGR) Mean OH increases by 0.16%. No changes in emissions. O3 at surface increases everywhere, especially over continents, max increase ~2ppb over China/SE Asia.OH at surface increases by up to 2% over boreal forests, sub-Saharan Africa, the Amazon, and SE Asia. Surface NOx patterns follow the OH. Column AODs show either zero or negligible changes. Primary and secondary organics at surface show negligble changes as well. Zonal means show no significant changes. 5. Merge GEOS-Chem 14.4.3 back into the 14.5.0 development branch #2425 Benchmark is zero-diff w/r/t the previous alpha benchmark. 6. Chemistry for RCOOH, monoterpenes, new PNs and ANs from Travis et al. (2024) #2318 and Add emission factors for ALK6, C4H6, EBZ, STYR, TMB emissions in GFED and FINN biomass burning #285 "Mean OH decreases by 0.31%. Most species show significant changes in global mass, especially the VOCs. J-values of most species show very slight increases. Emissions are unchanged except for: HCOOH (which now has a contribution from biomass burning), the new species added in this PR, and ALK4 (which now has had some emissions attributed to ALK6 etc.). NO and NO2 emissions increase along the coasts, probably due to PARANOX. Several primary organic species (MOH, ISOP, LIMO, BENZ, TOLU, XYLE) show slight increases over the Amazon, sub-Saharan Africa, and boreal forests. MTPA shows decreases over oceans where concentrations are small. but also slight increases over the continents. ALK4 concentrations show large decreases over SE asia and Nigeria and smaller changes over places where concentrations are small. Most secondary organic concentrations show very small differences except for SOAGX, which increases everywhere. Others follow the pattern of ISOP. Also note: alpha.6 is 15% slower due to the additional advected species that have been added. 7. Fix inconsistent pressure units in HEMCO standalone #284 This PR only affects the HEMCO standalone model and does not change the benchmark results. 8. Fix mass non-conservation in VDIFF PBL mixing Mean OH decreases by -0.029%. Most species show a change in global mass of less than +/- 1%. The largest changes are in the sea salt alkalinity species, SALAAL and SALCAL. SALAAL shows up to 40% enhancement over continents; SALCAL shows increases from 10-100% over continents. This is driven by the fix in PBL mixing. Several aerosol species (BrSALC, ISALC, NITs, SO4s) show significant increases in zonal mean plots at the tropopause and free troposphere, also driven by the mixing fix. 9. Restore dry deposition output in GCHP & GCClassic fullchem benchmark simulations #2144 This is a zero-diff update that causes the DryDep collection to be archived by default in all fullchem benchmark simulations. 10. Adding PPN photolysis #2371 Mean OH increases by 0.5%. Most species show small changes in global mass of less that +/- 0.5% except for A3O2, OTHRO2, and PPN. PPN decreases in mass by 68%, due to this update. Emissions are unchanged. Negligible changes for O3, CO, NOx, and OH at surface and 500hPa, as well as for column AOD's. Time spent in photolysis increased by 20% from alpha.7, but not sure if this is due to just the PPN itself. 11. Update run scripts and environment files for NASA discover cluster This update does not affect benchmark simulations. 12. Update GFED4_Climatology entries for period 2010-2023 with new species This update introduces a new GFED climatology that now includes emissions for the species that were added in the Travis et al 2024 chemistry. The GFED climatology is not used or benchmark simulations, so this update will not affect the results of benchmark simulations. 13. Update Cloud-J submodule to v8.0.0 and Support for Cloud-J v8.0.0 Mean OH decreases by 0.2% PPN J-value diagnostic shows zero everywhere (?!), maybe a diagnostic issue. All J-values show negligible differences. OH at surface increases by up to 1ppb, especially in the ITCZ where H2O absorption may be relevant. CO at surface increases up to 3ppb, especially in and off the coast of W. Africa, with small decreases over the SE US and Amazon. OH at surface changes negligibly, and NOx at surface increases by about 0.1ppb or less over continents, especially in SE Asia. Most primary organics show small changes in zonal mean plots, At surface TOLU, XYLE, TMB, and similar species increase by up to 1.5X, with the greatest increases in the tropics. 14. Store aerosol-specific optics files in new Aerosol_Optics data directory #2426 This update moves several configuration files containing aerosol optical properties. It does not change benchmark results. 15. Use JVN_ as max not exact number of J-values Cloud-J This update restores PPN photolysis only. Mean OH increased by 0.04%. Emissions are unchanged except for very slight differences in NO and O3 caused by PARANOx. Most species show a global mass change of +/- 0.5 or less, many species have diffs much less than that. 16. Bug fix: Reorder photo rxns for PNs and ANs (from PR #2318) This update places PNs and ANs species in the proper order for FJX_j2j.dat. It also restores photolysis for these species (thanks to the fix in Cloud-J PR #26), which in previous alphas was zero. Mean OH increases by 0.022%. But the ANs and PNs show no difference in J-values. I believe it may have been because the FJX_j2j.dat with the 177 photo species may not have been updated properly. Thus this alpha only seems to show the contribution from PPN photolysis, which is very slight. 18. Update Is_Photolysis tags in species_database.yml to be consistent with Cloud-J file FJX_j2j.dat The only difference is that the J-value diagnostics now contain the new species added in the Travis et al 2024 chemistry. 19. Updated soil NOx scheme from Yi Wang et al. (2021) as an option #2430 This update does not change benchmark results, as this scheme is currently disabled. We need to obtain a sufficient archive of the TSOIL1 met field before we can activate the new soil NOx scheme. 20. Fix dry mass fraction of sea salt in aerosol thermodynamics #2467 NH4, HMS, and ISALA increase slightly over oceans, while NIT, SALAAL, SALACL, SALCAL, SALCCL, and SO4s decrease slightly. Global mean OH changed by -0.36%. 21. Remove J-value diagnostics which are all zero #2464 This update removes species from the JValues collection that do not have an entry in the FJX_j2j.dat configuration file that is used for Cloud-J. Benchmark results are not affected otherwise. 22. Restore stale workflow (PRs in GCClassic, GCHP, geos-chem, HEMCO repos) This PR only affects the GitHub "stale" action, which marks issues and PRs as stale after a certain period of time with no activity. 23. CH4 reservoir seasonality This update only affects CH4 and carbon specialty simulations. 24. Bug fix for double counting CH4 agricultural burning emissions This update only affects CH4 and carbon specialty simulations. 25. Fix a bug in coarse-mode seasalt Ca, Mg, and K Large (> 10%) changes seen in many aerosol species including BrSALA, BrSALC, SALACL, SALCAL, SALCCL, NITs, SO4s Global mean OH changes by 0.61%. 26. Update to Cloud-J 8.0.1 release This fixes a bug that caused Cloud-J to potentially skip reading species from the FJX_j2j.dat configuration file. It does not change benchmark results. 27. GCHP carbon simulation fixes This update only affects the GCHP carbon simulation. It does not change benchmark results.

1-month GEOS-Chem Classic version comparison (14.4.3 vs 14.5.0)

Below are links to plots and tables comparing 1-month simulations for GEOS-Chem Classic 14.5.0 (Dev) and GEOS-Chem Classic 14.4.3 (Ref).

Species Category	Plots					Additional Information
	Level Map		Zonal Mean		Emissions
Oxidants O3, CO, OH, NOx	sfc	500hPa	full column	stratosphere	sfc
Aerosols DST1, DST2, DST3, DST4, NH4, NIT, SO4, HMS, BCPI, BCPO, OCPI, OCPO, AERI, BrSALA, BrSALC, ISALA, ISALC, NITs, SALA, SALC, SO4s, Simple_SOA, Complex_SOA, pFe	sfc	500hPa	full column	stratosphere	column total	AOD
Bromine Bry, BrOx, Br, Br2, BrCl, BrNO2, BrNO3, BrO, CH3Br, CH2Br2, CHBr3, HOBr, HBr	sfc	500hPa	full column	stratosphere	column total
Chlorine Cly, ClOx, Cl, ClO, Cl2, Cl2O2, ClOO, ClNO2, ClNO3, CCl4, CFCs, CH3Cl, CH2Cl2, CH3CCl3, CHCl3, HOCl, HCl, Halons, HCFCs, OClO	sfc	500hPa	full column	stratosphere	--
Iodine Iy, IxOy, I, I2, IBr, ICl, IO, IONO, IONO2, CH3I, CH2I2, CH2ICl, CH2IBr, HI, HOI, OIO	sfc	500hPa	full column	stratosphere	column total
Nitrogen NOy, NOx, HNO2, HNO3, HNO4, MPAN, NIT, NO, NO2, NO3, N2O5, MPN, PAN, PPN, N2O, NHx, NH3, NH4, MENO3, ETNO3, IPRNO3, NPRNO3, AONITA, ETHN, BZPAN, NPHEN	sfc	500hPa	full column	stratosphere	column total
Primary Organics EOH, MOH, ISOP, MTPA, MTPO, LIMO, ALK4, ALK6, BENZ, CH4, C2H2, C2H4, C2H6, C3H8, C4H6, EBZ, PRPE, STYR, TMB, TOLU, XYLE	sfc	500hPa	full column	stratosphere	column total
Secondary Organics ACTA, MACR, ALD2, BALD, CH2O, HPALDs, MACR, IEPOX, ACET, HAC, MEK, MVK, ISOPN, FURA, GLYC, GLYX, HCOOH, RCOOH, MAP, PHEN, RCHO, ETHP, MP	sfc	500hPa	full column	stratosphere	column total
Secondary Organic Aerosols TSOA0, TSOA1, TSOA2, TSOA3, ASOA1, ASOA2, ASOA3, ASOAN, TSOG0, TSOG1, TSOG2, TSOG3, ASOG1, ASOG2, ASOG3, INDIOL, LVOCOA, SOAIE, SOAGX, SOAP, SOAS	sfc	500hPa	full column	stratosphere	column total
Sulfur SOx, DMS, HMS, OCS, SO2, SO4	sfc	500hPa	full column	stratosphere	column total
ROy H2O2, H, H2, H2O, HO2, O1D, OH, RO2	sfc	500hPa	full column	stratosphere	--
J-values	sfc	500hPa	full column	stratosphere	--	--
Emissions by HEMCO category	Total Aircraft, Anthropogenic, Biomass Burning, Biogenic, Lightning, Natural, Ocean, Seabirds, Decaying Plants, Ship, Soil, Degassing Volcanoes, Erupting Volcanoes
Emission totals	Tables by species Tables by inventory
Global mass	Entire atmosphere Troposphere only
Metrics	OH concentration, MCF lifetime, CH4 lifetime
Timing	GCClassic 14.4.3 vs 14.5.0

1-month GCHP version comparison (14.4.3 vs 14.5.0)

Below are links to plots and tables comparing 1-month simulations for GCHP 14.5.0 (Dev) and GCHP 14.4.3 (Ref).

Species Category2	Plots					Additional Information
	Level Map		Zonal Mean		Emissions
Oxidants O3, CO, OH, NOx	sfc	500hPa	full column	stratosphere	column total
Aerosols DST1, DST2, DST3, DST4, NH4, NIT, SO4, BCPI, BCPO, OCPI, OCPO, AERI, BrSALA, BrSALC, ISALA, ISALC, NITs, SALA, SALC, SO4s, Simple_SOA, Complex_SOA, pFe	sfc	500hPa	full column	stratosphere	column total	AOD
Bromine Bry, BrOx, Br, Br2, BrCl, BrNO2, BrNO3, BrO, CH3Br, CH2Br2, CHBr3, HOBr, HBr	sfc	500hPa	full column	stratosphere	column total
Chlorine Cly, ClOx, Cl, ClO, Cl2, Cl2O2, ClOO, ClNO2, ClNO3, CCl4, CFCs, CH3Cl, CH2Cl2, CH3CCl3, CHCl3, HOCl, HCl, Halons, HCFCs, OClO	sfc	500hPa	full column	stratosphere	--
Iodine Iy, IxOy, I, I2, IBr, ICl, IO, IONO, IONO2, CH3I, CH2I2, CH2ICl, CH2IBr, HI, HOI, OIO	sfc	500hPa	full column	stratosphere	column total
Nitrogen NOy, NOx, HNO2, HNO3, HNO4, MPAN, NIT, NO, NO2, NO3, N2O5, MPN, PAN, PPN, N2O, NHx, NH3, NH4, MENO3, ETNO3, IPRNO3, NPRNO3	sfc	500hPa	full column	stratosphere	column total
Primary Organics EOH, MOH, ISOP, MTPA, MTPO, LIMO, ALK4, ALK6, BENZ, CH4, C2H2, C2H4, C2H6, C3H8, C4H6, EBZ, PRPE, STYR, TMB, TOLU, XYLE	sfc	500hPa	full column	stratosphere	column total
Secondary Organics ACTA, MACR, ALD2, BALD, CH2O, HPALDs, MACR, IEPOX, ACET, HAC, MEK, MVK, ISOPN, FURA, GLYC, GLYX, HCOOH, RCOOH, MAP, PHEN, RCHO, ETHP, MP	sfc	500hPa	full column	stratosphere	column total
Secondary Organic Aerosols TSOA0, TSOA1, TSOA2, TSOA3, ASOA1, ASOA2, ASOA3, ASOAN, TSOG0, TSOG1, TSOG2, TSOG3, ASOG1, ASOG2, ASOG3, INDIOL, LVOCOA, SOAIE, SOAGX, SOAP, SOAS	sfc	500hPa	full column	stratosphere	column total
Sulfur SOx, DMS, HMS, OCS, SO2, SO4	sfc	500hPa	full column	stratosphere	column total
ROy H2O2, H, H2, H2O, HO2, O1D, OH, RO2	sfc	500hPa	full column	stratosphere	--
J-values	sfc	500hPa	full column	stratosphere	--	--
Emissions by HEMCO category	Total Aircraft, Anthropogenic, Biomass Burning, Biogenic, Lightning, Natural, Ocean, Seabirds, Decaying Plants, Ship, Soil, Degassing Volcanoes, Erupting Volcanoes
Emission totals	Tables by species Tables by inventory
Global mass	Entire atmosphere Troposphere only
Metrics	OH concentration, MCF lifetime, CH4 lifetime
Timing	GCHP 14.4.3 vs 14.5.0

1-month GCHP vs GEOS-Chem Classic comparison

Below are links to plots and tables comparing 1-month simulations for GCHP 14.5.0 (Dev) and GEOS-Chem Classic 14.4.3 (Ref).

Species Category2	Plots					Additional Information
	Level Map		Zonal Mean		Emissions
Oxidants O3, CO, OH, NOx	sfc	500hPa	full column	stratosphere	column total
Aerosols DST1, DST2, DST3, DST4, NH4, NIT, SO4, BCPI, BCPO, OCPI, OCPO, AERI, BrSALA, BrSALC, ISALA, ISALC, NITs, SALA, SALC, SO4s, Simple_SOA, Complex_SOA, pFe	sfc	500hPa	full column	stratosphere	column total	AOD
Bromine Bry, BrOx, Br, Br2, BrCl, BrNO2, BrNO3, BrO, CH3Br, CH2Br2, CHBr3, HOBr, HBr	sfc	500hPa	full column	stratosphere	column total
Chlorine Cly, ClOx, Cl, ClO, Cl2, Cl2O2, ClOO, ClNO2, ClNO3, CCl4, CFCs, CH3Cl, CH2Cl2, CH3CCl3, CHCl3, HOCl, HCl, Halons, HCFCs, OClO	sfc	500hPa	full column	stratosphere	--
Iodine Iy, IxOy, I, I2, IBr, ICl, IO, IONO, IONO2, CH3I, CH2I2, CH2ICl, CH2IBr, HI, HOI, OIO	sfc	500hPa	full column	stratosphere	column total
Nitrogen NOy, NOx, HNO2, HNO3, HNO4, MPAN, NIT, NO, NO2, NO3, N2O5, MPN, PAN, PPN, N2O, NHx, NH3, NH4, MENO3, ETNO3, IPRNO3, NPRNO3	sfc	500hPa	full column	stratosphere	column total
Primary Organics EOH, MOH, ISOP, MTPA, MTPO, LIMO, ALK4, ALK6, BENZ, CH4, C2H2, C2H4, C2H6, C3H8, C4H6, EBZ, PRPE, STYR, TMB, TOLU, XYLE	sfc	500hPa	full column	stratosphere	column total
Secondary Organics ACTA, MACR, ALD2, BALD, CH2O, HPALDs, MACR, IEPOX, ACET, HAC, MEK, MVK, ISOPN, FURA, GLYC, GLYX, HCOOH, RCOOH, MAP, PHEN, RCHO, ETHP, MP	sfc	500hPa	full column	stratosphere	column total
Secondary Organic Aerosols TSOA0, TSOA1, TSOA2, TSOA3, ASOA1, ASOA2, ASOA3, ASOAN, TSOG0, TSOG1, TSOG2, TSOG3, ASOG1, ASOG2, ASOG3, INDIOL, LVOCOA, SOAIE, SOAGX, SOAP, SOAS	sfc	500hPa	full column	stratosphere	column total
Sulfur SOx, DMS, HMS, OCS, SO2, SO4	sfc	500hPa	full column	stratosphere	column total
ROy H2O2, H, H2, H2O, HO2, O1D, OH, RO2	sfc	500hPa	full column	stratosphere	--
J-values	sfc	500hPa	full column	stratosphere	--	--
Emissions by HEMCO category	Total Aircraft, Anthropogenic, Biomass Burning, Biogenic, Lightning, Natural, Ocean, Seabirds, Decaying Plants, Ship, Soil, Degassing Volcanoes, Erupting Volcanoes
Emission totals	Tables by species Tables by inventory
Global mass	Entire atmosphere Troposphere only
Metrics	OH concentration, MCF lifetime, CH4 lifetime

1-month GCHP vs GEOS-Chem-Classic diff-of-diffs

Below are links to plots and tables comparing 1-month simulations for GCHP 14.5.0 - 14.4.3 (Dev) and GEOS-Chem Classic GCHP 14.5.0 - 14.4.3 (Ref).

Species Category2	Plots
	Level Map		Zonal Mean
Oxidants O3, CO, OH, NOx	sfc	500hPa	full column	stratosphere
Aerosols DST1, DST2, DST3, DST4, NH4, NIT, SO4, BCPI, BCPO, OCPI, OCPO, AERI, BrSALA, BrSALC, ISALA, ISALC, NITs, SALA, SALC, SO4s, Simple_SOA, Complex_SOA, pFe	sfc	500hPa	full column	stratosphere
Bromine Bry, BrOx, Br, Br2, BrCl, BrNO2, BrNO3, BrO, CH3Br, CH2Br2, CHBr3, HOBr, HBr	sfc	500hPa	full column	stratosphere
Chlorine Cly, ClOx, Cl, ClO, Cl2, Cl2O2, ClOO, ClNO2, ClNO3, CCl4, CFCs, CH3Cl, CH2Cl2, CH3CCl3, CHCl3, HOCl, HCl, Halons, HCFCs, OClO	sfc	500hPa	full column	stratosphere
Iodine Iy, IxOy, I, I2, IBr, ICl, IO, IONO, IONO2, CH3I, CH2I2, CH2ICl, CH2IBr, HI, HOI, OIO	sfc	500hPa	full column	stratosphere
Nitrogen NOy, NOx, HNO2, HNO3, HNO4, MPAN, NIT, NO, NO2, NO3, N2O5, MPN, PAN, PPN, N2O, NHx, NH3, NH4, MENO3, ETNO3, IPRNO3, NPRNO3	sfc	500hPa	full column	stratosphere
Primary Organics EOH, MOH, ISOP, MTPA, MTPO, LIMO, ALK4, ALK6, BENZ, CH4, C2H2, C2H4, C2H6, C3H8, C4H6, EBZ, PRPE, STYR, TMB, TOLU, XYLE	sfc	500hPa	full column	stratosphere
Secondary Organics ACTA, MACR, ALD2, BALD, CH2O, HPALDs, MACR, IEPOX, ACET, HAC, MEK, MVK, ISOPN, FURA, GLYC, GLYX, HCOOH, RCOOH, MAP, PHEN, RCHO, ETHP, MP	sfc	500hPa	full column	stratosphere
Secondary Organic Aerosols TSOA0, TSOA1, TSOA2, TSOA3, ASOA1, ASOA2, ASOA3, ASOAN, TSOG0, TSOG1, TSOG2, TSOG3, ASOG1, ASOG2, ASOG3, INDIOL, LVOCOA, SOAIE, SOAGX, SOAP, SOAS	sfc	500hPa	full column	stratosphere
Sulfur SOx, DMS, OCS, SO2, SO4	sfc	500hPa	full column	stratosphere
ROy H2O2, H, H2, H2O, HO2, O1D, OH, RO2	sfc	500hPa	full column	stratosphere

1-year full-chemistry benchmarks

1-year fullchem benchmark setup

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

Git tag(s):	14.5.0-rc.0 (GEOS-Chem Classic) 14.5.0-rc.0 (GCHP)
Compared to previous benchmark:	14.4.0-rc.0
Software environment:	gcc 10.2.0 OpenMPI 4.1.0 netcdf-fortran 4.5.3 CMake 3.25.2 ESMF 8.4.2
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°
Chemistry setup:	Mechanism: See fullchem.eqn Benchmark categories: See benchmark_categories.yml Lumped species: See lumped_species.yml
Spin-up initial conditions:	January 1, 2019 from 14.4.0 1-year benchmark NOTE: GCHP c24 regridded from GEOS-Chem Classic 4° x 5°
Benchmark date:	Spin-up run: Jul 2018 - Dec 2018 Production run: Jan 2019 - Dec 2019

1-year fullchem GEOS-Chem Classic version comparison (14.5.0 vs 14.4.0)

Below are links to plots and tables comparing 1-year full-chemistry simulations for GEOS-Chem Classic 14.5.0 (Dev) and GEOS-Chem Classic 14.4.0 (Ref).

Category1	Plots					Additional Information
	Level Map		Zonal Mean		Emissions
Oxidants O3, CO, OH, NOx	Surface Annual mean Jan Apr Jul Oct	500 hPa Annual mean Jan Apr Jul Oct	Full column Annual mean Jan Apr Jul Oct	Stratosphere Annual mean Jan Apr Jul Oct	Full column Annual mean Jan Apr Jul Oct
Aerosols DST1, DST2, DST3, DST4, NH4, NIT, SO4, BCPI, BCPO, OCPI, OCPO, AERI, BrSALA, BrSALC, ISALA, ISALC, NITs, SALA, SALC, SO4s, Simple_SOA, Complex_SOA	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	AOD Annual Mean Jan Apr Jul Oct Aerosol profiles Aerosol burdens Global mean AOD
Bromine Bry, BrOx, Br, Br2, BrCl, BrNO2, BrNO3, BrO, CH4Br, CH2Br2, CH2Br2, CH3Br3, HOBr, HBr	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Chlorine Cly, ClOx, Cl, ClO, Cl2, Cl2O2, ClOO, ClNO2, ClNO3, CCl4, CFCs, CH3Cl, CH2Cl2, CH4CCl3, HOCl, HCl, Halons, HCFCs, OClO	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	-
Iodine Iy, IxOy, I, I2, IBr, ICl, IO, INO2, IONO2, CH3I, CH2I2, CH2ICl, CH2IBr, HI, HOI, OIO	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Nitrogen NOy, NOx, HNO2, HNO3, HNO4, MPAN, NIT, NO, NO2, NO3, N2O5, MPN, PAN, PPN, N2O, NHx, NH3, NH4, MENO3, ETNO3, IPRNO3, NPRNO3	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Primary Organics EOH, MOH, ISOP, MTPA, MTPO, LIMO, ALK4, ALK6, BENZ, CH4, C2H2, C2H4, C2H6, C3H8, C4H6, EBZ, PRPE, STYR, TMB, TOLU, XYLE	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Secondary Organics ACTA, MACR, ALD2, BALD, CH2O, HPALDs, MACR, IEPOX, ACET, HAC, MEK, MVK, ISOPN, FURA, GLYC, GLYX, HCOOH, RCOOH, MAP, PHEN, RCHO, ETHP, MP	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Secondary Organic Aerosols TSOA0, TSOA1, TSOA2, TSOA3, ASOA1, ASOA2, ASOA3, ASOAN, TSOG0, TSOG1, TSOG2, TSOG3, ASOG1, ASOG2, ASOG3, INDIOL, LVOCOA, SOAIE, SOAGX, SOAP, SOAS	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Sulfur SOx, DMS, OCS, SO2, SO4	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
ROy H2O2, H, H2, H2O, HO2, O1D, OH, RO2	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	-
J-values	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	-
Dry deposition velocities ACET, HNO3, NH3, NH4, NIT, NITs, O3, SO4	Surface Annual Mean Jan Apr Jul Oct
Emissions by HEMCO category	Total: Annual Mean, Jan, Apr, Jul, Oct Aircraft: Annual Mean, Jan, Apr, Jul, Oct Anthropogenic: Annual Mean, Jan, Apr, Jul, Oct Biomass burning: Annual Mean, Jan, Apr, Jul, Oct Biogenic: Annual Mean, Jan, Apr, Jul, Oct Lightning: Annual Mean, Jan, Apr, Jul, Oct Natural: Annual Mean, Jan, Apr, Jul, Oct Ocean: Annual Mean, Jan, Apr, Jul, Oct Plant decay: Annual Mean, Jan, Apr, Jul, Oct Sea birds: Annual Mean, Jan, Apr, Jul, Oct Ship: Annual Mean, Jan, Apr, Jul, Oct Soil: Annual Mean, Jan, Apr, Jul, Oct Volcano degassing: Annual Mean, Jan, Apr, Jul, Oct Volcano erupting: Annual Mean, Jan, Apr, Jul, Oct
Emission totals	Tables by species Tables by inventory
Global mass	Entire atmosphere: Jan, Apr, Jul, Oct Troposphere only: Jan, Apr, Jul, Oct
Metrics	OH concentration, MCF lifetime, CH4 lifetime O3 strat-trop exchange Tropospheric Ox budget
Model vs Observations	O3 Profiles: Ozonesondes (2010-2019) Seasonal plots: EBAS surface O3, 2019 (see ebas-data.nilu.no)

1-year fullchem GCHP vs GEOS-Chem Classic comparison

Below are links to plots and tables comparing 1-year full-chemistry simulations for GCHP 14.5.0 (Dev) and GEOS-Chem Classic 14.5.0 (Ref).

Category1	Plots					Additional Information
	Level Map		Zonal Mean		Emissions
Oxidants O3, CO, OH, NOx	Surface Annual mean Jan Apr Jul Oct	500 hPa Annual mean Jan Apr Jul Oct	Full column Annual mean Jan Apr Jul Oct	Stratosphere Annual mean Jan Apr Jul Oct	Full column Annual mean Jan Apr Jul Oct
Aerosols DST1, DST2, DST3, DST4, NH4, NIT, SO4, BCPI, BCPO, OCPI, OCPO, AERI, BrSALA, BrSALC, ISALA, ISALC, NITs, SALA, SALC, SO4s, Simple_SOA, Complex_SOA	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	AOD Annual Mean Jan Apr Jul Oct Aerosol profiles Aerosol burdens Global mean AOD
Bromine Bry, BrOx, Br, Br2, BrCl, BrNO2, BrNO3, BrO, CH4Br, CH2Br2, CH2Br2, CH3Br3, HOBr, HBr	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Chlorine Cly, ClOx, Cl, ClO, Cl2, Cl2O2, ClOO, ClNO2, ClNO3, CCl4, CFCs, CH3Cl, CH2Cl2, CH4CCl3, HOCl, HCl, Halons, HCFCs, OClO	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	-
Iodine Iy, IxOy, I, I2, IBr, ICl, IO, INO2, IONO2, CH3I, CH2I2, CH2ICl, CH2IBr, HI, HOI, OIO	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Nitrogen NOy, NOx, HNO2, HNO3, HNO4, MPAN, NIT, NO, NO2, NO3, N2O5, MPN, PAN, PPN, N2O, NHx, NH3, NH4, MENO3, ETNO3, IPRNO3, NPRNO3	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Primary Organics EOH, MOH, ISOP, MTPA, MTPO, LIMO, ALK4, ALK6, BENZ, CH4, C2H2, C2H4, C2H6, C3H8, C4H6, EBZ, PRPE, STYR, TMB, TOLU, XYLE	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Secondary Organics ACTA, MACR, ALD2, BALD, CH2O, HPALDs, MACR, IEPOX, ACET, HAC, MEK, MVK, ISOPN, FURA, GLYC, GLYX, HCOOH, RCOOH, MAP, PHEN, RCHO, ETHP, MP	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Secondary Organic Aerosols TSOA0, TSOA1, TSOA2, TSOA3, ASOA1, ASOA2, ASOA3, ASOAN, TSOG0, TSOG1, TSOG2, TSOG3, ASOG1, ASOG2, ASOG3, INDIOL, LVOCOA, SOAIE, SOAGX, SOAP, SOAS	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Sulfur SOx, DMS, OCS, SO2, SO4	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
ROy H2O2, H, H2, H2O, HO2, O1D, OH, RO2	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	-
J-values	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	-
Dry deposition velocities ACET, HNO3, NH3, NH4, NIT, NITs, O3, SO4	Surface Annual Mean Jan Apr Jul Oct
Emissions by HEMCO category	Total: Annual Mean, Jan, Apr, Jul, Oct Aircraft: Annual Mean, Jan, Apr, Jul, Oct Anthropogenic: Annual Mean, Jan, Apr, Jul, Oct Biomass burning: Annual Mean, Jan, Apr, Jul, Oct Biogenic: Annual Mean, Jan, Apr, Jul, Oct Lightning: Annual Mean, Jan, Apr, Jul, Oct Natural: Annual Mean, Jan, Apr, Jul, Oct Ocean: Annual Mean, Jan, Apr, Jul, Oct Plant decay: Annual Mean, Jan, Apr, Jul, Oct Sea birds: Annual Mean, Jan, Apr, Jul, Oct Ship: Annual Mean, Jan, Apr, Jul, Oct Soil: Annual Mean, Jan, Apr, Jul, Oct Volcano degassing: Annual Mean, Jan, Apr, Jul, Oct Volcano erupting: Annual Mean, Jan, Apr, Jul, Oct
Emission totals	Tables by species Tables by inventory
Global mass	Entire atmosphere: Jan, Apr, Jul, Oct Troposphere only: Jan, Apr, Jul, Oct
Metrics	OH concentration, MCF lifetime, CH4 lifetime rc.0/GCHP/FullChem/BenchmarkResults/GCHP_GCC_comparison/Tables/Ox_budget_troposphere_2019.txt Tropospheric Ox budget]
Model vs Observations	O3 Profiles: Ozonesondes (2010-2019) Seasonal plots: EBAS surface O3, 2019 (see ebas-data.nilu.no)

1-year fullchem GCHP version comparison (14.5.0 vs. 14.4.0)

Below are links to plots and tables comparing 1-year full-chemistry simulations for GCHP 14.5.0 (Dev) and GCHP 14.4.0 (Ref).

Category1	Plots					Additional Information
	Level Map		Zonal Mean		Emissions
Oxidants O3, CO, OH, NOx	Surface Annual mean Jan Apr Jul Oct	500 hPa Annual mean Jan Apr Jul Oct	Full column Annual mean Jan Apr Jul Oct	Stratosphere Annual mean Jan Apr Jul Oct	Full column Annual mean Jan Apr Jul Oct
Aerosols DST1, DST2, DST3, DST4, NH4, NIT, SO4, BCPI, BCPO, OCPI, OCPO, AERI, BrSALA, BrSALC, ISALA, ISALC, NITs, SALA, SALC, SO4s, Simple_SOA, Complex_SOA	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	AOD Annual Mean Jan Apr Jul Oct Aerosol profiles Aerosol burdens Global mean AOD
Bromine Bry, BrOx, Br, Br2, BrCl, BrNO2, BrNO3, BrO, CH4Br, CH2Br2, CH2Br2, CH3Br3, HOBr, HBr	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Chlorine Cly, ClOx, Cl, ClO, Cl2, Cl2O2, ClOO, ClNO2, ClNO3, CCl4, CFCs, CH3Cl, CH2Cl2, CH4CCl3, HOCl, HCl, Halons, HCFCs, OClO	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	-
Iodine Iy, IxOy, I, I2, IBr, ICl, IO, INO2, IONO2, CH3I, CH2I2, CH2ICl, CH2IBr, HI, HOI, OIO	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Nitrogen NOy, NOx, HNO2, HNO3, HNO4, MPAN, NIT, NO, NO2, NO3, N2O5, MPN, PAN, PPN, N2O, NHx, NH3, NH4, MENO3, ETNO3, IPRNO3, NPRNO3	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Primary Organics EOH, MOH, ISOP, MTPA, MTPO, LIMO, ALK4, ALK6, BENZ, CH4, C2H2, C2H4, C2H6, C3H8, C4H6, EBZ, PRPE, STYR, TMB, TOLU, XYLE	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Secondary Organics ACTA, MACR, ALD2, BALD, CH2O, HPALDs, MACR, IEPOX, ACET, HAC, MEK, MVK, ISOPN, FURA, GLYC, GLYX, HCOOH, RCOOH, MAP, PHEN, RCHO, ETHP, MP	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Secondary Organic Aerosols TSOA0, TSOA1, TSOA2, TSOA3, ASOA1, ASOA2, ASOA3, ASOAN, TSOG0, TSOG1, TSOG2, TSOG3, ASOG1, ASOG2, ASOG3, INDIOL, LVOCOA, SOAIE, SOAGX, SOAP, SOAS	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
Sulfur SOx, DMS, OCS, SO2, SO4	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct
ROy H2O2, H, H2, H2O, HO2, O1D, OH, RO2	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	-
J-values	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct	-
Dry deposition velocities ACET, HNO3, NH3, NH4, NIT, NITs, O3, SO4	Surface Annual Mean Jan Apr Jul Oct
Emissions by HEMCO category	Total: Annual Mean, Jan, Apr, Jul, Oct Aircraft: Annual Mean, Jan, Apr, Jul, Oct Anthropogenic: Annual Mean, Jan, Apr, Jul, Oct Biomass burning: Annual Mean, Jan, Apr, Jul, Oct Biogenic: Annual Mean, Jan, Apr, Jul, Oct Lightning: Annual Mean, Jan, Apr, Jul, Oct Natural: Annual Mean, Jan, Apr, Jul, Oct Ocean: Annual Mean, Jan, Apr, Jul, Oct Plant decay: Annual Mean, Jan, Apr, Jul, Oct Sea birds: Annual Mean, Jan, Apr, Jul, Oct Ship: Annual Mean, Jan, Apr, Jul, Oct Soil: Annual Mean, Jan, Apr, Jul, Oct Volcano degassing: Annual Mean, Jan, Apr, Jul, Oct Volcano erupting: Annual Mean, Jan, Apr, Jul, Oct
Emission totals	Tables by species Tables by inventory
Global mass	Entire atmosphere: Jan, Apr, Jul, Oct Troposphere only: Jan, Apr, Jul, Oct
Metrics	OH concentration, MCF lifetime, CH4 lifetime Tropospheric Ox budget
Model vs Observations	O3 Profiles: Ozonesondes (2010-2019) Seasonal plots: EBAS surface O3, 2019 (see ebas-data.nilu.no)

1-year fullchem GCHP vs GEOS-Chem Classic difference of differences

Below are links to plots and tables comparing 1-year full-chemistry simulations for GCHP 14.5.0 - 14.4.0 (Dev) and GEOS-Chem Classic 14.5.0 - 14.4.0 (Ref).

Category1	Plots
	Level Map		Zonal Mean
Oxidants O3, CO, OH, NOx	Surface Annual mean Jan Apr Jul Oct	500 hPa Annual mean Jan Apr Jul Oct	Full column Annual mean Jan Apr Jul Oct	Stratosphere Annual mean Jan Apr Jul Oct
Aerosols DST1, DST2, DST3, DST4, NH4, NIT, SO4, BCPI, BCPO, OCPI, OCPO, AERI, BrSALA, BrSALC, ISALA, ISALC, NITs, SALA, SALC, SO4s, Simple_SOA, Complex_SOA	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct
Bromine Bry, BrOx, Br, Br2, BrCl, BrNO2, BrNO3, BrO, CH4Br, CH2Br2, CH2Br2, CH3Br3, HOBr, HBr	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct
Chlorine Cly, ClOx, Cl, ClO, Cl2, Cl2O2, ClOO, ClNO2, ClNO3, CCl4, CFCs, CH3Cl, CH2Cl2, CH4CCl3, HOCl, HCl, Halons, HCFCs, OClO	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct
Iodine Iy, IxOy, I, I2, IBr, ICl, IO, INO2, IONO2, CH3I, CH2I2, CH2ICl, CH2IBr, HI, HOI, OIO	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct
Nitrogen NOy, NOx, HNO2, HNO3, HNO4, MPAN, NIT, NO, NO2, NO3, N2O5, MPN, PAN, PPN, N2O, NHx, NH3, NH4, MENO3, ETNO3, IPRNO3, NPRNO3	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct
Primary Organics EOH, MOH, ISOP, MTPA, MTPO, LIMO, ALK4, ALK6, BENZ, CH4, C2H2, C2H4, C2H6, C3H8, C4H6, EBZ, PRPE, STYR, TMB, TOLU, XYLE	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct
Secondary Organics ACTA, MACR, ALD2, BALD, CH2O, HPALDs, MACR, IEPOX, ACET, HAC, MEK, MVK, ISOPN, FURA, GLYC, GLYX, HCOOH, RCOOH, MAP, PHEN, RCHO, ETHP, MP	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct
Secondary Organic Aerosols TSOA0, TSOA1, TSOA2, TSOA3, ASOA1, ASOA2, ASOA3, ASOAN, TSOG0, TSOG1, TSOG2, TSOG3, ASOG1, ASOG2, ASOG3, INDIOL, LVOCOA, SOAIE, SOAGX, SOAP, SOAS	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct
Sulfur SOx, DMS, OCS, SO2, SO4	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct
ROy H2O2, H, H2, H2O, HO2, O1D, OH, RO2	Surface Annual Mean Jan Apr Jul Oct	500 hPa Annual Mean Jan Apr Jul Oct	Full column Annual Mean Jan Apr Jul Oct	Stratosphere Annual Mean Jan Apr Jul Oct