GEOS-Chem 14.3.0

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GEOS-Chem Versions Page

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

Version overview

This version is currently in development

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

What's new in this version

Updates that will affect full-chemistry benchmark simulations

Feature Contributor(s) Model scope Notes and references
Update reactions with new JPL & IUPAC recommendations Kelvin Bates (NOAA CSL) Chemistry
Interim fix for runaway HMS chemistry Sebastian Eastham (MIT) Chemistry
Cloud-J for computing photolysis rates as default Lizzie Lundgren (Harvard) Photolysis
Fix bugs setting strat aerosol OD passed to Fast-JX Lizzie Lundgren (Harvard) Photolysis
Bug fix for dry deposition to snow and ice Ryan Pound (York) Dry deposition
Bug fix for application of FRSNO in land cover arrays Ryan Pound (York) Dry deposition
TOMAS in GCHP Betty Croft (Dalhousie) TOMAS
Add nitrate aerosol to Ox family definition in gckpp.kpp Melissa Sulprizio (Harvard) Diagnostics

Updates that will NOT affect full-chemistry benchmark simulations

Feature Contributor(s) Model scope Notes and references
Updates that will NOT affect full-chemistry benchmark simulations
GEOS-IT meteorology Lizzie Lundgren (Harvard) New meteorology option
Bug fix for TOMAS sulfate production rates Betty Croft (Dalhousie) TOMAS
Now read the Hg restart file from GEOSCHEM_RESTARTS/v2023-12 Helene Angot (CNRS/IGE)
Viral Shah (GMAO)
Bob Yantosca (Harvard) 		Hg sim
Remove month loop in GetIndex2Interp (bug fix for LAI interpolation) Nick Balasus (Harvard) LAI
Add missing units in comments of KPP/fullchem/commonIncludeVars.sh Jessica Haskins (U. Utah)
Bob Yantosca (Harvard) 		Documentation
Move aerosol_mod.F90 module arrays to state_chm Lizzie Lundgren (Harvard) Structural
Reduce timers to essential list only Melissa Sulprizio (Harvard) Structural
Use rundir (not absolute path) to select the executable file for integration and parallel tests Bob Yantosca (Harvard) Testing
Fix additional memory leaks in GEOS-Chem Bob Yantosca (Harvard) Performance
Stratospheric adjustment and additional output fields for RRTMG in GCHP Seb Eastham (Imperial College)
Lizzie Lundgren (Harvard) 		GCHP
RRTMG
Avoid a semicolon in CMAKE_Fortran_Flags when passing additional flags to CMake Simon Branford (Birmingham) GCHP
Increase time limits for GCHP integration tests Bob Yantosca (Harvard) GCHP
Fix IsModelLevel check for CESM and WRF-GC Haipeng Lin (Harvard) CESM/
WRF-GC
GEOS-Chem TransportTracers simulation in GEOS Lizzie Lundgren (Harvard) GEOS
Updates from GMAO for GEOS Lizzie Lundgren (Harvard) GEOS

New data directories

The following data directories have been added or updated in this version. You will have to download the directories relevant to your simulation.

Inventory Simulations What was added? Directory
Cloud-J look-up tables fullchem, aerosol-only, Hg ExtData/CHEM_INPUTS/CLOUD-J/v2023-05
ExtData/CHEM_INPUTS/CLOUD-J/v2023-11-Hg
RRTMG RRTMG
(GCHP only) 		ExtData/HEMCO/RRTMG/v2018-11
Restart files Hg simulation ExtData/GEOSCHEM_RESTARTS/v2023-12
CH4 emissions from hydropower carbon sim
CH4 sim
tagCH4 sim 		ExtData/HEMCO/CH4/v2023-04/ResME/

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):
Compared to previous benchmark: 14.2.3
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):

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: 06:24 07:39
Memory 11.4 GB 39.9 GB
Global mean OH:
(% change from previous version) 		13.66302413734 x 105 molec/cm3
(-0.52%) 		13.66922273982 x 105 molec/cm3
(-0.55%)
Methyl chloroform lifetime:
(% change from previous version) 		4.514408 years
(+1.03%) 		4.491664 years
(+0.97%)
Methane lifetime:
(% change from previous version) 		7.613229 years
(+1.08%) 		7.571283 years
(+1.01%)
Details
Species, J-Values, and COLUMN AOD values that changed by 10% or more at the surface: GEOS-Chem Classic 14.3.0 vs 14.2.3 GCHP 14.3.0 vs 14.2.3
Species and J-Values that changed by 10% or more at 500 hPa: GEOS-Chem Classic 14.3.0 vs 14.2.3 GCHP 14.3.0 vs 14.2.3
Species and J-Values that changed by 10% or more in zonal mean: GEOS-Chem Classic 14.3.0 vs 14.2.3 GCHP 14.3.0 vs 14.2.3
Emissions that changed by 10% or more: GEOS-Chem Classic 14.3.0 vs 14.2.3 GCHP 14.3.0 vs 14.2.3
Overview
Below we summarize the notable changes caused by specific updates. See also the internal benchmark results which isolate impacts from specific updates.

1. Update reactions with new JPL & IUPAC recommendations

Kelvin Bates wrote, "Changes to most species' concentrations are minor, but all are well-documented in the forthcoming paper. Among the largest changes are (a) faster propane oxidation resulting in lower propane mixing ratios; (b) new propane branching ratios causing higher acetone production and mixing ratios; (c) lower C1 Criegee Intermediate + H2O reaction rate causing lower HMHP production; (d) lower Peracetic acid (MAP) + OH rate causing higher MAP mixing ratios and correspondingly lower mixing ratios of PAN and acetic acid; (e) slight increases in NOx, HO2, OH, H2O2 (all <2% in the troposphere) and decreases in surface ozone (-4%) and CO (<1%) due to a whole host of competing effects from changed reaction rates." Global mean OH changed by 0.15%.

2. Interim fix for runaway HMS chemistry

Differences are very small (<<1%) for most species except for HMS which increases by 3%. Global mean OH changed by 0.006%.

3. Cloud-J for computing photolysis rates as default

Changes are relatively small (<3%) for all species as expected from the change from Fast-JX to Cloud-J. Global mean OH changes by 0.38%.

4. Fix bugs setting strat aerosol OD passed to Fast-JX

Changes are small as expected due to J-value changes. Global mean OH changed by -0.0018%. Lizzie Lundgren wrote, "Differences in stratosphere are clustered towards poles which is consistent with the new inclusion of polar strat cloud contribution for computation of J-values."

5. Bug fix for dry deposition to snow and ice

Changes are small and are mainly restricted to the polar regions. Global mean OH changes by 0.0072%.

6. Bug fix for application of FRSNO in land cover arrays

Changes are very small. Global mean OH changed by -0.00045%.

7. TOMAS in GCHP

Changes are on the level of numerical noise due to rebuilding the fullchem mechanism in KPP with new dummy species. Global mean OH changes by 0.0008%.

8. Add nitrate aerosol to Ox family definition in gckpp.kpp

Differences are small (< 0.01%) for all species and global mean OH changes by 0.003%. These changes are introduced from rebuilding the fullchem mechanism in KPP.

1-month GEOS-Chem Classic version comparison (14.3.0 vs 14.2.3)

Below are links to plots and tables comparing 1-month simulations for GEOS-Chem Classic 14.3.0 (Dev) and GEOS-Chem Classic 14.2.3 (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

1-month GCHP version comparison (14.3.0 vs 14.2.3)

Below are links to plots and tables comparing 1-month simulations for GCHP 14.3.0 (Dev) and GCHP 14.2.3 (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

1-month GCHP vs GEOS-Chem Classic comparison

Below are links to plots and tables comparing 1-month simulations for GCHP 14.3.0 (Dev) and GEOS-Chem Classic 14.3.0 (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 14.3.0 - 14.2.3 (Dev) and GEOS-Chem Classic GCHP 14.3.0 - 14.2.3 (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
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