GEOS-Chem 14.2.0

GEOS-Chem Versions Page

Version overview

• Release Date: 05 Oct 2023
• DOI for GC Classsic 14.2.0: 10.5281/zenodo.8411496
• DOI for GCHP 14.2.0: [1]
• DOI for GEOS-Chem 14.2.0 10.5281/zenodo.8411433
• DOI for HEMCO 3.7.0: 10.5281/zenodo.8411445

The following items have been added to GEOS-Chem 14.2.0. Also see the following Github pages:

• 14.2.0 milestone for geoschem/GCClassic
• 14.2.0 milestone for geoschem/GCHP
• 14.2.0 milestone for geoschem/geos-chem (science code)
• 3.7.0 milestone for geoschem/HEMCO

Feature	Contributor(s)	Model scope	Notes and references
Updates that will affect full-chemistry benchmark simulations
Nitrate photolysis	Viral Shah (NASA GMAO)	Chemistry	geos-chem PR #1623
Update VOC fire emissions and adding lumped furan	Colette Heald (MIT) Tess Carter (MIT)	Chemistry	geos-chem PR#1642 HEMCO PR #189
Reinstate Iy sink reactions on alkaline sea salt aerosol and remove IONO2 recycling on alkaline sea salt aerosol	Becky Alexander (UW)	Chemistry	geos-chem PR #1620
Add S(IV)+HOBr and S(IV)+HOCl reactions into fullchem mechanism (they had been inadvertently omitted)	Becky Alexander (UW)	Chemistry Bug fix	geos-chem PR #1630
Fix sea salt alkalinity and heterogeneous acid-catalyzed halogen chemistry	Becky Alexander (UW) Viral Shah (GMAO)	Chemistry Bug fix	geos-chem #1933 geos-chem #1952
Prevent divide-by-zero error in sulfur chemistry	Lizzie Lundgren (Harvard)	Chemistry Bug fix	geos-chem PR #1698
Bug fix: Initialize CO2 to a relevant value for full-chemistry	Mike Long (GMAO) Bob Yantosca (Harvard)	Chemistry Bug fix	geos-chem PR #1731
Fix bug in HOBr uptake rate calculation	Viral Shah (GMAO)	Chemistry Bug fix	geos-chem PR #1751
Change relative tolerance back to 0.5e-2 to address model slowdown from other 14.2.0 chemistry updates	Melissa Sulprizio (Harvard)	Chemistry Bug fix	geos-chem PR #1815
Turn SSA debromination on by default	Melissa Sulprizio (Harvard)	Chemistry Emissions	[geos-chem PR #1703
Restore vertical allocation of CEDS energy and industry emissions	Melissa Sulprizio (Harvard)	Emissions Bug fix	geos-chem PR #1712
Updates that will NOT affect full-chemistry benchmark simulations
Update transport tracer simulation for consistency with the tracer gridded component in GEOS	Melissa Sulprizio (Harvard)	TransportTracer simulation	geos-chem PR #1816 HEMCO PR #214
Update entrainment-limited kinetics in clouds	Chris Holmes (FSU)	Chemistry	geos-chem PR #1292 NOTE: Will not affect benchmarks because this function is not currently used
Now use consistent behavior when the first call to the KPP integrator fails	Bob Yantosca (Harvard)	Chemistry	geos-chem PR #1609 NOTE: Will not affect simulations where no KPP integration errors occur.
Extend GFED4 biomass burning data through Oct 2022	Makoto Kelp (Harvard) Bob Yantosca (Harvard)	Emissions	geos-chem PR #1709 NOTE: Will not affect benchmarks, because the benchmark year is 2019, and we are only adding new years 2020-2022.
Add climatology option for GFED4 biomass burning emissions	Melissa Sulprizio (Harvard)	Emissions	geos-chem PR #1758
Add climatology option for lightning NOx	Lee Murray (Rochester) Melissa Sulprizio (Harvard)	Emissions	geos-chem PR #1628
Fixes for reading masks in HEMCO	Bob Yantosca (Harvard) Haipeng Lin (Harvard)	HEMCO Bug fix	HEMCO PR #198
Remove computational bottlenecks in hco_calc_mod.F90	Bob Yantosca (Harvard)	HEMCO Bug fix	HEMCO PR #201
Add compatibility for NAG compiler in HEMCO	Francis Vitt (NCAR) Haipeng Lin (Harvard)	HEMCO	HEMCO PR #212
Updates and fixes for the CH4 simulation Fix selection of troposphere-stratosphere boundary in global_ch4_mod.F90 Remove operator splitting in OH/Cl methane destruction Updated loss frequencies for CH4 simulation	Todd Mooring (Harvard)	CH4 & carbon simulations	geos-chem PR #1710 geos-chem PR #1740 geos-chem PR #1776
Update global anthropogenic CH4 emissions to EDGARv7.0	Melissa Sulprizio (Harvard)	CH4 & carbon simulations Emissions	geos-chem PR #1773
Methane emissions from hydropower reservoirs	Kyle Delwiche (UC Berkeley) Melissa Sulprizio (Harvard)	CH4 & carbon simulations Emissions	geos-chem PR #1784
Add RxnConst diagnostic for archiving reaction rate constants	Haipeng Lin (Harvard)	Diagnostics	geos-chem PR #1728
Store HEMCO restart files in the run directory Restarts/ subdirectory	Bob Yantosca (Harvard)	Structural	HEMCO PR #202 geos-chem PR #1718
Reduce log file output in GEOS-Chem and HEMCO	Bob Yantosca (Harvard)	Structural	geos-chem PR #1549 geos-chem PR #1678 HEMCO PR #182
Remove NcdfUtil/perl directory from GEOS-Chem and HEMCO	Bob Yantosca (Harvard)	Structural	geos-chem PR #1567 HEMCO PR #183
Restructure photolysis to abstract original Fast-JX	Lizzie Lundgren (Harvard)	Structural	geos-chem PR #1733 Preliminary step before adding Cloud-J
Remove array temporaries from seasalt_mod.F90 and carbon_mod.F90	Bob Yantosca (Harvard)	Structural Bug fix	geos-chem PR #1729
Do not halt benchmark simulations and integration/parallel tests if there are missing species in restart files and/or boundary conditions	Bob Yantosca (Harvard)	Testing	geos-chem PR #1647 geos-chem PR #1706
Fix typo in Intel debug option in CMakeLists.txt	Lee Murray (Rochester)	GCC Build Bug fix	GCClassic PR #39
Fix bug in global 0.25x0.3125 HEMCO standalone simulations	Melissa Sulprizio (Harvard)	HEMCO standalone	HEMCO PR #207
Add run configuration files for WRF-GC	Haipeng Lin (Harvard)	WRF-GC	geos-chem PR #1692
Allow the use of OFFLINE_SEASALT for seasalt alkalinity, Cl, and Br in GEOS-Chem within CESM	Haipeng Lin (Harvard)	CESM-GC	geos-chem PR #1804
Use MODEL_CESM instead of HEMCO_CESM CPP switch in HEMCO	Haipeng Lin (Harvard)	HEMCO CESM-GC	HEMCO PR #197
Updates that will only affect GCHP
Use dry pressure in GCHP advection	Lizzie Lundgren (Harvard)	Advection	GCHP PR #317 geos-chem PR #1797 FVdycoreCubed_GridComp PR #7
Fix bug in tagged ozone simulation that caused simulation to crash	Lizzie Lundgren (Harvard)	Bug fix	geos-chem PR #1724
Write all checkpoint files directly to Restarts directory and rename mid-run checkpoints	Lizzie Lundgren (Harvard)	Run directory	geos-chem PR #1724
Add configurable option to allow overwriting diagnostics (enabled by default)	Lizzie Lundgren (Harvard)	Run directory	geos-chem PR #1724
Make run-time configurable option for requiring presence of all species in restart file	Lizzie Lundgren (Harvard)	Run directory	geos-chem PR #1724
Fix bug preventing running with over 3000 cores	Lizzie Lundgren (Harvard)	Bug fix	geos-chem PR #1724
Make FindESMF.cmake use consistent libs	Sebastian Eastham (MIT)	Build system	GCHP PR #309
Update GCHP check for python and bc libs to prevent error checking fail	Lizzie Lundgren (Harvard)	Run directory	geos-chem PR #1777
Fix GCHP time_mod start and elapsed times	Lizzie Lundgren (Harvard)	Bug fix	geos-chem PR #1781
Fix error in pressure level edge construction	Sebastian Eastham (MIT)	Advection	GCHP PR #312

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
GFED4 biomass burning	Several	Dry matter data and scale factors for additional years 2020 - Oct 2022 Climatology emissions for 2010-2019 and monthly mean emissions for 2007-2021 (current GFED4 record) generated by a 0.5x0.625 HEMCO standalone simulation	ExtData/HEMCO/GFED4/v2023-03
EDGARv7.0, GC_CH4_LOSS, ResME	CH4	EDGARv7.0 annual CH4 emissions for 2010-2021 Monthly scale factors computed from EDGARv6.0 for applying seasonality to EDGARv7.0 CH4 loss frequencies computed from GEOS-Chem 14.0.0 1-year benchmark CH4 emissions from hydropower reservoirs	ExtData/HEMCO/CH4/v2023-04

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: 14.2.0-rc.2 (aka 14.2.0-alpha.20) GCHP: 14.2.0-rc.2 (aka 14.2.0-alpha.20) HEMCO: 3.7.0-rc.0
Compared to previous benchmark:	14.1.1
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):

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:	06:30	07:49
Memory	11.0 GB	40.0 GB
Global mean OH: (% change from previous version)	13.43850761193 x 105 molec/cm3 (+8.05%)	13.11612003755 x 105 molec/cm3 (+5.54%)
Methyl chloroform lifetime: (% change from previous version)	4.569879 years (-8.00%)	4.720860 years (-4.71%)
Methane lifetime: (% change from previous version)	7.700680 years (-8.01%)	7.961379 years (-4.60%)
Details
Species, J-Values, and COLUMN AOD values that changed by 10% or more at the surface:	GEOS-Chem Classic 14.2.0 vs 14.1.1	GCHP 14.2.0 vs 14.1.1
Species and J-Values that changed by 10% or more at 500 hPa:	GEOS-Chem Classic 14.2.0 vs 14.1.1	GCHP 14.2.0 vs 14.1.1
Species and J-Values that changed by 10% or more in zonal mean:	GEOS-Chem Classic 14.2.0 vs 14.1.1	GCHP 14.2.0 vs 14.1.1
Emissions that changed by 10% or more:	GEOS-Chem Classic 14.2.0 vs 14.1.1	GCHP 14.2.0 vs 14.1.1
Overview
Below we summarize the notable changes caused by specific updates. See also the internal benchmark results which isolate impacts from specific updates. 1. Nitrate photolysis This update causes large changes. NOx increases in the N. Hemisphere, with the largest changes over the tropics. Surface O3 increases by up to 3ppb. Global mean OH changes by 8.39%. This is consistent with the results of Shah et al. where they reported, "Including pNO photolysis in the model significantly increases modeled NOx concentrations below 6 km... The largest increase is in the tropics (30∘ S–30∘ N)... The effect of pNO photolysis is generally smaller above 6 km because of lower pNO concentrations... The ozone concentrations in the upper troposphere in the model are, on average, 20 ppbv higher than the ATom observations." 2. Turn SSA debromination on by default This updates adds back the BrSALA and BrSALC emission sources. It also impacts other emissions over oceans (iodine, PARANOX). Bromine species increase considerably over oceans and ozone decreases by up to 10 ppb over the Souther Ocean. Global mean OH changes by -1.23%. 3. Reinstate Iy sink reactions on alkaline sea salt aerosol and remove IONO2 recycling on alkaline sea salt aerosol Concentrations of ISALA/ISALC increase and IONO/IONO2 decrease over oceans as expected from restoring the Iy sink reactions. Ozone increases very slightly (max 0.005 ppb). Global mean OH changes by 0.017%. 4. Fix sea salt alkalinity and heterogeneous acid-catalyzed halogen chemistry Becky wrote, "This fix causes BrO to decrease everywhere as expected. O3 is more complicated, showing increases in the SH and decreases in the NH." We see consistent changes here. OH increases over S. Hemisphere oceans and decreases over N. Hemisphere oceans. Overall, global mean OH changes by -1.66%. 5. Add S(IV)+HOBr and S(IV)+HOCl reactions into fullchem mechanism (they had been inadvertently omitted) Becky writes, "This does not change the enhanced sulfate production rate (SR) because SR is the same but is now split up between O3, HOBr, and HOCl instead of all being attributed to O3... he changes to SO2, SO4, HOBr, HBr, HOCl, HCl, O3, and BrO for January 2019 are small to negligible." We see consistent changes here. Global mean OH changes by -0.0016%. 6. Bug fix: Initialize CO2 to a relevant value for full-chemistry The CO2 fix causes very small changes in other species. CO2 changes are large in the global mass table because it is no longer being forced to zero. The global mean OH change is 0.00048%. 7. Fix bug in HOBr uptake rate calculation Viral wrote, "Fixing this will increase the loss of HOBr (to HBr) and could lower BrOx levels, with a larger effect for simulations that include sea salt aerosol debromination." The 1-month benchmark confirms these changes, with decreases in BrOx and increases in O3. The overall impact on global mean OH is small at -0.006%. 8. Update VOC fire emissions and adding lumped furan Large changes are observed in biomass burning emissions due to changing GFED4 emission factors. Two new species (BUTDI and FURA) are added. The change in global mean OH is -0.18%. 9. Restore vertical allocation of CEDS energy and industry emissions Differences caused by this update are small, and can be seen as reduction of anthropogenic emissions and species concentrations at the surface primarily over land as well as increases aloft. Total column emissions show changes on the level of numerical noise. Global mean OH changes by 0.17%

1-month GEOS-Chem Classic version comparison (14.2.0 vs 14.1.1)

Below are links to plots and tables comparing 1-month simulations for GEOS-Chem Classic 14.2.0 (Dev) and GEOS-Chem Classic 14.1.1 (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

1-month GCHP version comparison (14.2.0 vs 14.1.1)

Below are links to plots and tables comparing 1-month simulations for GCHP 14.2.0 (Dev) and GCHP 14.1.1 (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

1-month GCHP vs GEOS-Chem Classic comparison

Below are links to plots and tables comparing 1-month simulations for GCHP 14.2.0 (Dev) and GEOS-Chem Classic 14.2.0 (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

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

Below are links to plots and tables comparing 1-month simulations for GCHP 14.2.0 - 14.1.1 (Dev) and GEOS-Chem Classic GCHP 14.2.0 - 14.1.1 (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

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):	14.2.0-rc.1 (GEOS-Chem Classic) 14.2.0-rc.1 (GCHP)
Compared to previous benchmark:	14.0.0
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°
Spin-up initial conditions:	January 1, 2019 from 14.0.0 10-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 (14.2.0 vs 14.0.0)

Below are links to plots and tables comparing 1-year full-chemistry simulations for GEOS-Chem Classic 14.2.0 (Dev) and GEOS-Chem Classic 14.0.0 (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, BENZ, CH4, C2H6, C3H8, PRPE, 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, ALD2, CH2O, HPALDs, MACR, IEPOX, ACET, MEK, MVK, ISOPN, GLYX, HCOOH, MAP, RCHO, 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	-
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	Aerosols: Seasonal plots, Scatter plots Aircraft: C2H6, C3H8, CO, H2O2, HNO3, NO, O3, PAN CO: Profiles Latitudal distribution Ships Seasonal plots: Surface, MOZAIC 4 levels O3: Profiles: GMI, MOZAIC Seasonal plots: EBAS surface O3, 2019 (see ebas-data.nilu.no) — new in 14.2.0 Historical seasonal plots: Surface, GMI 3 levels, GMI 4 levels, MOZAIC 3 levels, MOZAIC 4 levels PAN: Profiles PM2.5 with simple SOA: Maps, Scatter plots PM2.5 with complex SOA: Maps, Scatter plots

1-year fullchem GCHP vs GEOS-Chem Classic comparison

Below are links to plots and tables comparing 1-year full-chemistry simulations for GCHP 14.2.0 (Dev) and GEOS-Chem Classic 14.2.0 (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	Column total 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, pFe	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	Column total Annual mean Jan Apr Jul Oct	AOD Annual mean Jan Apr Jul Oct 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	Column total 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	Column total 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	Column total Annual mean Jan Apr Jul Oct
Primary Organics EOH, MOH, ISOP, MTPA, MTPO, LIMO, ALK4, BENZ, CH4, C2H6, C3H8, PRPE, 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	Column total Annual mean Jan Apr Jul Oct
Secondary Organics ACTA, ALD2, CH2O, HPALDs, MACR, IEPOX, ACET, HAC, MEK, MVK, ISOPN, GLYC, GLYX, HCOOH, MAP, RCHO, 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	Column total 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	Column total 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	Column total 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	-
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
Model vs Observations	O3 Seasonal plots: EBAS surface O3, 2019 (see ebas-data.nilu.no) — new in 14.2.0

1-year fullchem GCHP version comparison (14.2.0 vs 14.0.0)

Below are links to plots and tables comparing 1-year full-chemistry simulations for GCHP 14.2.0 (Dev) and GCHP 14.0.0 (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	Column total 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, pFe	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	Column total Annual mean Jan Apr Jul Oct	AOD Annual mean Jan Apr Jul Oct 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	Column total 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	Column total 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	Column total Annual mean Jan Apr Jul Oct
Primary Organics EOH, MOH, ISOP, MTPA, MTPO, LIMO, ALK4, BENZ, CH4, C2H6, C3H8, PRPE, 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	Column total Annual mean Jan Apr Jul Oct
Secondary Organics ACTA, ALD2, CH2O, HPALDs, MACR, IEPOX, ACET, HAC, MEK, MVK, ISOPN, GLYC, GLYX, HCOOH, MAP, RCHO, 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	Column total 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	Column total 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	Column total 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	-
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
Model vs Observations	O3: Seasonal plots: EBAS surface O3, 2019 (see ebas-data.nilu.no) — new in 14.2.0

1-year transport tracers benchmarks

1-year transport benchmark setup

The following table describes the setup for the GEOS-Chem Classic 1-year transport tracer benchmark simulation.

Git tag(s):	14.2.0-rc.1
Compared to previous benchmark:	14.0.0
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°
Spin-up initial conditions:	GEOS-Chem Classic: January 1, 2019 from GEOS-Chem 14.0.0 1-year transport tracer benchmark GCHP: January 1, 2019 c24 regridded from GEOS-Chem Classic 4° x 5° spin-up run
Benchmark date:	Spinup run: Jan 2009 - Dec 2018 (GEOS-Chem Classic only) Production run: Jan 2019 - Dec 2019

1-year transport GEOS-Chem Classic version comparison (14.2.0 vs 14.0.0)

This table contains plots comparing 1-year transport tracer simulations for GEOS-Chem Classic 14.2.0 (Dev) and GEOS-Chem Classic 14.0.0 (Ref).

Category1	Plots
	Level Map		Zonal Mean
RnPbBeTracers Rn222, Pb210, Pb210s, Be7, Be7s, Be10, Be10s	Surface Jan Apr Jul Oct Mean	500 hPa Jan Apr Jul Oct Mean	Full column Jan Apr Jul Oct Mean	Stratosphere Jan Apr Jul Oct Mean
TransportTracers: PassiveTracer, SF6, CH3I, aoa, aoa_bl, aoa_nh, CO_25, CO_50, e90, e90_n, e90_s, st80_25, stOX	Surface Jan Apr Jul Oct Mean	500 hPa Jan Apr Jul Oct Mean	Full column Jan Apr Jul Oct Mean	Stratosphere Jan Apr Jul Oct Mean
WetLossConv Pb210, Pb210s, Be7, Be7s, Be10, Be10s	Surface Jan Apr Jul Oct Mean	500 hPa Jan Apr Jul Oct Mean	Full column Jan Apr Jul Oct Mean	Stratosphere Jan Apr Jul Oct Mean
WetLossLS Pb210, Pb210s, Be7, Be7s, Be10, Be10s	Surface Jan Apr Jul Oct Mean	500 hPa Jan Apr Jul Oct Mean	Full column Jan Apr Jul Oct Mean	Stratosphere Jan Apr Jul Oct Mean
Pb-Be Budgets	GEOS-Chem 14.0.0 (Ref): Troposphere Stratosphere Troposphere + Stratosphere		GEOS-Chem 14.2.0 (Dev): Troposphere Stratosphere Troposphere + Stratosphere
Strat-trop exchange	GEOS-Chem 14.0.0 (Ref): Monthly and annual mean values		GEOS-Chem 14.2.0 (Dev): Monthly and annual mean values
Mass conservation	GEOS-Chem 14.0.0 (Ref): Passive tracer		GEOS-Chem 14.2.0 (Ref): Passive tracer

1-year transport GCHP vs GEOS-Chem Classic comparison

This table contains plots comparing 1-year transport tracer simulations for GCHP 14.2.0 (Dev) and GCClassic 14.2.0 (Ref).

Category1	Plots
	Level Map		Zonal Mean
RnPbBeTracers Rn222, Pb210, Pb210s, Be7, Be7s, Be10, Be10s	Surface Jan Apr Jul Oct Mean	500 hPa Jan Apr Jul Oct Mean	Full column Jan Apr Jul Oct Mean	Stratosphere Jan Apr Jul Oct Mean
TransportTracers: PassiveTracer, SF6, CH3I, aoa, aoa_bl, aoa_nh, CO_25, CO_50, e90, e90_n, e90_s, st80_25, stOX	Surface Jan Apr Jul Oct Mean	500 hPa Jan Apr Jul Oct Mean	Full column Jan Apr Jul Oct Mean	Stratosphere Jan Apr Jul Oct Mean
WetLossConv Pb210, Pb210s, Be7, Be7s, Be10, Be10s	Surface Jan Apr Jul Oct Mean	500 hPa Jan Apr Jul Oct Mean	Full column Jan Apr Jul Oct Mean	Stratosphere Jan Apr Jul Oct Mean
WetLossLS Pb210, Pb210s, Be7, Be7s, Be10, Be10s	Surface Jan Apr Jul Oct Mean	500 hPa Jan Apr Jul Oct Mean	Full column Jan Apr Jul Oct Mean	Stratosphere Jan Apr Jul Oct Mean
Pb-Be Budgets	GCClassic 14.2.0 (Ref): Troposphere Stratosphere Troposphere + Stratosphere		GCHP 14.2.0 (Dev): Troposphere Stratosphere Troposphere + Stratosphere
Mass conservation	GCClassic 14.2.0 (Ref): Passive tracer		GCHP 14.2.0 (Dev): Passive tracer