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
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
ALK7	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 ALK7			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: 14.4.0-rc.0 (aka 14.4.0-alpha.17) GCHP: 14.4.0-rc.0 (aka 14.4.0-alpha.17) HEMCO: 3.8.0
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:	See fullchem.eqn
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

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:	06:12	07:06
Memory	11.5 GB	42.1 GB
Global mean OH: (% change from previous version)	13.57862664898 x 105 molec/cm3 (-1.06%)	13.57068350813 x 105 molec/cm3 (-1.18%)
Methyl chloroform lifetime: (% change from previous version)	4.524290 years (0.64%)	4.502573 years (0.66%)
Methane lifetime: (% change from previous version)	7.627114 years (0.59%)	7.586405 years (0.61%)
Details
Species, J-Values, and COLUMN AOD values that changed by 10% or more at the surface:	GEOS-Chem Classic 14.4.0 vs 14.4.3	GCHP 14.4.0 vs 14.4.3
Species and J-Values that changed by 10% or more at 500 hPa:	GEOS-Chem Classic 14.4.0 vs 14.4.3	GCHP 14.4.0 vs 14.4.3
Species and J-Values that changed by 10% or more in zonal mean:	GEOS-Chem Classic 14.4.0 vs 14.4.3	GCHP 14.4.0 vs 14.4.3
Emissions that changed by 10% or more:	GEOS-Chem Classic 14.4.0 vs 14.4.3	GCHP 14.4.0 vs 14.4.3
Overview
Below we summarize the notable changes caused by specific updates. See also the internal benchmark results which isolate impacts from specific updates. 1. Add diel and day-of-week scale factors to global base emissions This introduces small increases in emissions for CEDS species, especially over Africa and SE asia; most species show % change < 0.6%. Mean OH increases by 0.1%. Ratio plots show variation between ~0.992 and 1.007, so the changes are very small. 2. Updated 0.1x0.1 timezone file accounting for daylight savings Mean OH decreased by -0.02%; ISOP emissions increased by 0.1%, most anthro & ship emissions show change less than +/-0.01%. Biogenic emissions show increases of 1.2x over Russia (where emissions are already small) and lesser over S. America, in a striped pattern due to time zone alignments. 3. Updated surface methane boundary condition using NOAA flask data Differences are small (<0.1%) for all species. Global mean OH changed by 0.022%. 4. UCX bug fixes : (1) Use proper 4th index for WERADIUS array; (2) Get density of black carbon from the species database Changes are mainly limited to BCPI aerosol in the stratosphere (ratio varies from 0.93 to 1.06) Decreases are most pronounced in the winter pole/midlatitudes above 5hPa and increases at the winter pole between 90S and 60S and 40-10 hPa. Mean OH increases by 0.0009% 5. Update volcano emissions through 2023 SO2 volcanic degassing emissions change by -1% due to updating the inventory version. The impact on all species concentrations is small. Global mean OH decreases by -0.014%. 6. Fix uptake coefficients on stratospheric aerosol Mean OH increases by 0.0015%. Most species show very small changes (0.99-1.01) observed in NO2, NO3, and VOC observed in most ratio plots, except for: (1) HNO2 concentrations increase over the S. Pole by up to 3X skyward of 40hPa; (2) MPAN concentrations decreased by ~0.75 at ~10hPa between south of the equator; (3) NO, NO3, NPHEN concentrations decreased by 50% at ~100hPa and the S. Pole. 7. Fix PBL level calculations Mean OH decreased by -0.23%. NO, NO2, HNO3 ship emissions (via ParaNOx) show very small diffs ~ 0.2% or less. NOx concentrations show increases of up to 1.4X, especially over tropical oceans; there is also a slight decrease off the coast of W. Africa. Bry/BrOx show decreases in the tropical oceans. ISOP and related species show increases over S. America and Africa. 8. Updated gravitational settling, dry mass-weighted mean diameters and hygroscopic growth in aerosol dry deposition Mean OH decreases by 0.27%. DST1 increases in the Sahel by p to ~0.3 ug/m3 while other dust species show 2-5% DST2, DST3, DST4 show sizeable decreases (-11 to and -40 ug/m3) over Morocco and Western Sahara but relatively small changes where concentrations are already low. Other aerosols (e.g. NIT, NH3, etc) show most pronounced increases in the boreal regions but relatively small in magnitude, along with a general increase worldwide. Coarse seasalt shows large decreases but the bromine & chlorine seasalt species show very small changes. 9. Replace ISORROPIA II with HETP aerosol thermodynamics Mean OH decreased by 0.37%. Mostly small changes in aerosol species. Large decreases noted over the S. Pacific/Southern Ocean for SALCAL, with corresponding increases in SALACL. In general, course seasalt aerosols show decreases and fine seasalt aerosols show increases, perhaps reflecting a different partitioning in equilibrium between HETP/ISORROPIA. SALA, SALC, DST*, BC*, OC* species are not affected. 10. Parameterized Effective Radius for SNA and OM aerosols Mean OH decreases by -0.261%. Changes to AOD_SO4 and AOD_OCPI are consistent with those observed in the plot Haihui posted in PR #1902. SO4 and OC aerosol optical depth decreases by 20% or more in boreal regions, sub-Saharan Africa, India, China, and Indonesia/Thailand/Malaysia. 11. Global continental chlorine (pCl and HCl) emissions Concentrations of HCl increase over the continents as expected. Small increases can also be seen in other chlorine species. The global mass of ClNO2 increases the most by 20%. Global mean OH decreased by -0.023%.

1-month GEOS-Chem Classic version comparison (14.4.0 vs 14.4.3)

Below are links to plots and tables comparing 1-month simulations for GEOS-Chem Classic 14.4.0 (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, BENZ, CH4, C2H2, C2H4, C2H6, C3H8, PRPE, TOLU, XYLE	sfc	500hPa	full column	stratosphere	column total
Secondary Organics ACTA, ALD2, BALD, CH2O, HPALDs, MACR, IEPOX, ACET, HAC, MEK, MVK, ISOPN, GLYC, GLYX, HCOOH, 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 14.4.0

1-month GCHP version comparison (14.4.0 vs 14.4.3)

Below are links to plots and tables comparing 1-month simulations for GCHP 14.4.0 (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, BENZ, CH4, C2H6, C3H8, PRPE, TOLU, XYLE	sfc	500hPa	full column	stratosphere	column total
Secondary Organics ACTA, ALD2, CH2O, HPALDs, MACR, IEPOX, ACET, HAC, MEK, MVK, ISOPN, GLYC, GLYX, HCOOH, MAP, RCHO, 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 14.4.0

1-month GCHP vs GEOS-Chem Classic comparison

Below are links to plots and tables comparing 1-month simulations for GCHP 14.4.0 (Dev) and GEOS-Chem Classic 14.4.0 (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, BENZ, CH4, C2H6, C3H8, PRPE, TOLU, XYLE	sfc	500hPa	full column	stratosphere	column total
Secondary Organics ACTA, ALD2, CH2O, HPALDs, MACR, IEPOX, ACET, HAC, MEK, MVK, ISOPN, GLYC, GLYX, HCOOH, MAP, RCHO, 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 14.4.0 - 14.4.3 (Dev) and GEOS-Chem Classic GCHP 14.4.0 - 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, BENZ, CH4, C2H6, C3H8, PRPE, TOLU, XYLE	sfc	500hPa	full column	stratosphere
Secondary Organics ACTA, ALD2, CH2O, HPALDs, MACR, IEPOX, ACET, HAC, MEK, MVK, ISOPN, GLYC, GLYX, HCOOH, MAP, RCHO, 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