GEOS-Chem 13.4.0

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GEOS-Chem Versions Page

This page includes information about GEOS-Chem 13.4.0 (currently under development)

Version overview

The following items have been added to GEOS-Chem 13.4.0 since the last GEOS-Chem version GEOS-Chem 13.3.4. Also see the following Github pages:

Feature Contributor(s) Model scope Notes and references
Updates that will affect full-chemistry benchmark simulations
Migrate sulfate chemistry into KPP Mike Long (Harvard)
Viral Shah (Harvard)
Bob Yantosca (GCST)
Chemistry
Convert the HOCl & HOBr reactions with dissolved SO2 to use gas phase SO2 Mike Long (Harvard) Chemistry
Turn off sea salt debromination by default Viral Shah (Harvard)
Melissa Sulprizio (GCST)
Chemistry &
Emissions
Fix bug in Henry law CALC_HEFF routine in hetchem computations Viral Shah (Harvard) Chemistry
Bug fix: Remove double-counting of HCl uptake on acidic sea salt Viral Shah (Harvard) Chemistry
Update surface resistance for ozone deposition to ice/snow Ryan Pound (York)
Shuting Zhai (UW)
Dry deposition
AEIC 2019 aircraft emissions inventory Seb Eastham (MIT)
Thibaud Fritz (MIT)
Emissions
Use degassing-only volcano emissions in GEOS-Chem benchmark simulations Christoph Keller (GMAO)
Daniel Jacob (Harvard)
Emissions &
Benchmarking
Fix end year for CEDS_NO_SHIP and MULTISEAICE entries in HEMCO_Config.rc Liam Bindle (GCST) Emissions
Fix parallelization errors in GEOS-Chem Classic and add updates for better numerical stability Bob Yantosca (GCST) Structural
Use updated definition of PM2.5; Add PM10 diagnostic Bob Yantosca (GCST) Diagnostics &
Benchmarking


Updates that will NOT affect full-chemistry benchmark simulations
Updated Hg chemistry in KPP Viral Shah (Harvard)
Colin Thackray (Harvard)
Mike Long (GCST)
Bob Yantosca (GCST)
Chemistry
Bug fix: Use REAL*8 precision in for CH3O2 + OH reaction definition in fullchem.eqn Bob Yantosca (GCST) Chemistry
Updated Global Inventory of Methane Emissions from Oil/Gas/Coal (GFEI v2) Tia Scarpelli (U. Edinburgh)
Melissa Sulprizio (GCST)
Emissions
Anthropogenic Methane Emission Inventory for Canada Tia Scarpelli (U. Edinburgh)
Melissa Sulprizio (GCST)
Emissions
Use EDGARv6 global anthro emissions for CH4 simulation Melissa Sulprizio (GCST) Emissions
Updated Rn-222 emissions for TransportTracers simulations Bo Zhang (NIA) Emissions
Retire HEMCO extension for CH4 wetland emissions Melissa Sulprizio (GCST) Emissions
Updates to enable automated run directory creation Liam Bindle (GCST)
Melissa Sulprizio (GCST)
Run directory
Bug fix: Allow GEOS-Chem Classic History to archive irregular intervals (e.g. a month and a day) Bob Yantosca (GCST) Diagnostics
Updates for running GEOS-Chem within GEOS Christoph Keller (GMAO)
Lizzie Lundgren (GCST)
GEOS
Add CH4 pseudo flux diagnostic Christoph Keller (GMAO) Diagnostics
Add capability to write GEOS-Chem Classic timers to JSON file Bob Yantosca (GCST) Diagnostics
Update tagged Ox simulation to use archived prod/loss rates from GEOS-Chem and retire Linoz Bob Yantosca (GCST) Specialty simulation
Apply bug fix for dust aciduptake simulation Shixian Zhai (Harvard) Chemistry
Updates that will only affect GCHP
Add capability to use mass fluxes in advection Sebastian Eastham (MIT)
Liam Bindle (GCST)
Advection
Switch advection to use total pressure (rather than dry) Sebastian Eastham (MIT)
Liam Bindle (GCST)
Advection
Add option for driving GCHP with native GEOS meteorological files Liam Bindle (GCST) Structural
Add diagnostic for vertical air movement (vertical mass flux) Liam Bindle (GCST) Diagnostics
Define a GCHP "Default" diagnostic collection that will archive a small number of commonly-requested diagnostic fields Liam Bindle (GCST) Structural
Add capability to read native meteorological data files Liam Bindle (GCST)
Bob Yantosca (GCST)
Structural
Fix communicators leak Weiyuan Jiang (GSFC) Bug fix


Fix unintuitive error handling when untemplated file is missing Sebastian Eastham (MIT) Bug fix
Fix incorrect output file timestamp with 24-hour duration and 1-hour frequency Atanas Troyanov (GMAO) Bug fix
Fix units in FV3 mass flux variable that impacted vertical mass flux diagnostic Bill Putman (GMAO) Bug fix
Move call to setup_wetscav to prevent zero C_H2O used in wet scavening in first timestep Lizzie Lundgren (GCST) Bug fix

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
AEIC2019
  • fullchem
  • aerosol-only
  • tagCO
  • CO2
Aircraft emissions (with prior year scaling factors) from the AEIC inventory.
  • NOTE: Monthly-mean is the default, but daily emissions are also available for research purposes.
ExtData/AEIC2019/v2022-03/
Updated CH4 anthropogenic emissions:
  • CH4
  • IMI
ExtData/HEMCO/CH4/v2022-01
Updated Hg simulation restart file
  • Hg
Sample restart file for the updated Hg mechanism. See Viral Shah et al (2021) ExtData/GEOSCHEM_RESTARTS/v2021-12
Updated TOMAS simulation restart files
  • TOMAS
Added HSO3m and SO3mm species to TOMAS restart files ExtData/GEOSCHEM_RESTARTS/v2021-12
ZHANG_Rn222
  • TransportTracers
Updated Rn222 emissions for TransportTracers simulations. See Bo Zhang et al (2021) ExtData/HEMCO/ZHANG_Rn222/v2021-11

Notes for viewing benchmark plots

  1. Enable PDF bookmarks in the file links to navigate between species. If you do not see bookmarks in your browser try using a different browser (not Safari) or installing an Adobe Acrobat plug-in.
  2. See the species database for species definitions and details.
  3. Species categories and lumped species are defined in YAML files within the GEOS-Chem post-processing software GCPy.

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: 13.3.0
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: c48
Meteorology fields: MERRA-2
  • GEOS-Chem Classic: 4° x 5°
  • GCHP: 0.5° x 0.625°
Initial conditions: July 1, 2019
  • NOTE: GCHP c48 restart file regridded from GEOS-Chem Classic 4° x 5°
Benchmark month: July 2019
Emissions setup: HEMCO_Config.rc
Chemistry setup: 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):
    • Run directory creation scripts

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. Plots and tables for the internal benchmarks may be viewed at http://ftp.as.harvard.edu/gcgrid/geos-chem/validation/InternalBenchmarks/13.4.0/.

For more details on the update(s) included in each alpha version, see this README.

1-month benchmark assessment form

Performance GEOS-Chem Classic GCHP
Grid resolution: 4° x 5° C48
# CPUs, nodes: 48 CPUs
1 node (Intel Cascade Lake)
96 CPUs
2 nodes (Intel Cascade Lake)
Wall time: 03:17:57 06:17:09
CPU time / wall time: 30.66 95.26
% of ideal performance: 63.86% 97.3%
Memory: 11.3411 GB 119.0 GB
Global mean OH:
(% change from previous version)
12.04220281381 x 105 molec/cm3
(+2.52%)
11.91381282259 x 105 molec/cm3
(+1.98%)
Methyl chloroform lifetime:
(% change from previous version)
5.131181 years
(-2.55%)
5.186277 years
(-2.16%)
Methane lifetime:
(% change from previous version)
8.648384 years
(-2.52%)
8.739550 years
(-2.15%)
Details
Species, J-Values, and COLUMN AOD values that changed by 10% or more at the surface: GEOS-Chem Classic
13.4.0-rc.4 vs. 13.3.0-rc.1
GCHP 13.4.0-rc.4 vs. 13.3.0-rc.1
Species and J-Values that changed by 10% or more at 500 hPa: GEOS-Chem Classic
13.4.0-rc.4 vs. 13.3.0-rc.1
GCHP 13.4.0-rc.4 vs. 13.3.0-rc.1
Species and J-Values that changed by 10% or more in zonal mean: GEOS-Chem Classic
13.4.0-rc.4 vs. 13.3.0-rc.1
GCHP 13.4.0-rc.4 vs. 13.3.0-rc.1
Emissions that changed by 10% or more: GEOS-Chem Classic
13.4.0-rc.4 vs. 13.3.0-rc.1
GCHP 13.4.0-rc.4 vs. 13.3.0-rc.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. Migrating sulfate chemistry into KPP

An error in GEOS-Chem 13.3.0 meant that HMS chemistry was not properly implemented. This has now been fixed (see this plot).
Furthermore, this update causes the global tropospheric mass of BrO to increase by 11%:
                        before    after      diff      % diff
   BrO trop mass [Gg] : 9.543837  10.623180  1.079344  11.309
This increase (see plot) seems to be caused by the sulfur reactions on sea salt that were added to the KPP-generated chemical mechanism. The area of greatest change of BrO is at the surface southern extratropics, an area of high sea salt emissions. ]

Other changes in benchmark output related to this update are:

  • Very small changes in OH Metrics (mean OH +0.0004%)
  • Small changes in Oxidants concentrations.
  • SO2 at surface decreases by ~10%.
  • Large SO4 decreases (~50%) in the boreal forest regions of Canada & Russia.

2. Turn off sea salt aerosol debromination by default

To address the large increase in ozone concentrations over the Southern Ocean caused primarily by the sulfate chemistry updates and their impact on BrO, we now turn off sea salt aerosol debromination by default. This is done by turning off emissions of BrSALA and BrSALC via the Seasalt extension or offline seasalt emissions in HEMCO. This restores ozone back to reasonable levels as shown by the internal benchmark.

3. Convert the HOCl & HOBr reactions with dissolved SO2 to use gas phase SO2

The overall impact on model output appears small. For example, global mass differences for select species are:
    ###################################################################################
    ### Global mass (Gg) at end of simulation (Trop only)                           ###
    ### Ref = GCC_13.4.0-alpha.20; Dev = GCC_13.4.0-alpha.21                        ###
    ###################################################################################
                                        Ref                 Dev     Dev - Ref    % diff
    HBr                :           7.176643            7.253128      0.076485     1.066
    HCl                :         297.524170          297.648682      0.124512     0.042
    HOBr               :           7.022534            7.188446      0.165912     2.363
    HOCl               :           5.749225            5.807306      0.058081     1.010
    SO2                :         406.362946          406.138885     -0.224060    -0.055
    SO3mm              :           0.697430                 nan           nan       nan
    SO4                :        1644.606079         1644.084473     -0.521606    -0.032
    SO4s               :           0.420955            0.067558     -0.353397   -83.951

4. Fix bug in Henry law CALC_HEFF routine in hetchem computations

This update causes the global tropospheric mass of BrO to increase by 15%:
                        before    after     diff      % diff
   BrO trop mass [Gg} : 8.358857  9.663602  1.304745  15.609
Other changes in benchmark output related to this update are:
  • Very small changes in the OH metrics (mean OH -0.0698%, MCF lifetime +0.10%; CH4 lifetime +0.05%)
  • Small changes in Trop+Strat masses for most species.
  • Cl/Br species concentrations have significant changes primarily in the extratropics.

5. AEIC 2019 aircraft emissions inventory and Fix scale factors applied to VOC aircraft emissions in AEIC inventory

The impact of updating from AEIC 2005 to AEIC 2019 may be viewed in the aircraft emissions difference plot.

In addition, this version includes updated scale factors for AEIC VOC emissions, which correct the conversion from atoms C to kg species, result in significant decreases in emissions for VOC species. This occurs mostly in the northern hemisphere and up to the lower stratosphere (where most aircraft emissions are placed).

The total impact on aircraft emissions is:
    ###################################################################################
    ### Emissions totals for species ALD2 [Tg]                                      ###
    ### Ref = GCC_13.3.0-rc.1; Dev = GCC_13.4.0-rc.4                                ###
    ###################################################################################
                              Ref            Dev     Dev - Ref    % diff
    ALK4 Aircraft      :           0.005617            0.003038     -0.002579   -45.915
    BCPI Aircraft      :           0.000486            0.001650      0.001165   239.838
    C2H6 Aircraft      :           0.000152            0.000074     -0.000078   -51.395
    C3H8 Aircraft      :           0.000022            0.000011     -0.000011   -50.282
    CH2O Aircraft      :           0.002871            0.001749     -0.001122   -39.081
    CO Aircraft        :           0.068360            0.117254      0.048894    71.525
    MACR Aircraft      :           0.001827            0.000762     -0.001065   -58.287
    NO Aircraft        :           0.156922            0.228305      0.071384    45.490
    NO2 Aircraft       :                nan            0.048208           nan       nan
    OCPI Aircraft      :           0.000486            0.000691      0.000206    42.355
    PRPE Aircraft      :           0.004855            0.002530     -0.002325   -47.896
    RCHO Aircraft      :           0.001384            0.000522     -0.000861   -62.247
    SO2 Aircraft       :           0.019036            0.027639      0.008604    45.197
    SO4 Aircraft       :           0.000583            0.000846      0.000263    45.197
    SOAP Aircraft      :           0.004717            0.008091      0.003374    71.525

6. Bug fix: Remove double-counting of HCl uptake on acidic sea salt

This update causes the global tropospheric mass of BrO to increase by 13%:
                 before    after     diff      % diff
   alpha.4 BrO : 7.354777  8.358857  1.004080  13.652
Other changes in benchmark output related to this update are:
  • As expected, chlorine species concentrations decrease in the southern latitudes (esp. at about 40S), where there is more sea salt (and now less removal of HCl due to the bug fix).
  • Some increase of Cl species concentrations at northern latitudes are observed.
  • Cly concentrations generally increase.
  • Very small chagnes in OH metrics as well (mean OH -0.03% change).

7. Update surface resistance for ozone deposition to ice/snow

Barten et.al 2021 (https://doi.org/10.5194/acp-21-10229-2021) increased the surface resistance of ozone dry deposition to snow and ice to 1E4 s m−1, this results in a reduction of ozone deposition velocity to ice of <= 0.01 cm s−1 (~ 66% reduction) which has better agreement with observations and results in improved comparison between Ozone observations in the arctic.

Changes in benchmark output related to this update are:

  • Increase in O3 concentration at the summer polar latitudes (i.e. deposition to ice/snow is suppressed);
  • Minor change in other oxidants;
  • Neglible effect on OH metrics;
  • Neglible change in species mass (O3 only increases by 0.01%).

8. HEMCO bug fix: restore archiving via manual diagnostics (which had been inadvertently disabled in a prior update)

This update was added in 13.3.3 but does cause very slight changes in NOx soil and fertilizer emissions, as shown below. The HEMCO soil NOx extension uses an manual diagnostic to keep track of NOx from fertilizers.
     ###################################################################################
     ### Emissions totals for species NO [Tg]                                        ###
     ### Ref = GCC_13.3.0-rc.1; Dev = GCC_13.4.0-rc.0                                ###
     ###################################################################################
                                         Ref                 Dev     Dev - Ref    % diff
     NO Aircraft        :           0.156922            0.156922      0.000000     0.000
     NO Anthro          :           5.327773            5.327773      0.000000     0.000
     NO BioBurn         :           1.882279            1.882279      0.000000     0.000
     NO Fert            :           0.359627            0.359458     -0.000169    -0.047
     NO Lightning       :           1.664984            1.664984      0.000000     0.000
     NO Ship            :           0.073301            0.074878      0.001577     2.152
     NO Soil            :           1.745616            1.745500     -0.000115    -0.007
     -----------------------------------------------------------------------------------
     NO Total           :          10.850869           10.852331      0.001462     0.013

9. Use degassing-only volcano emissions in GEOS-Chem benchmark simulations

Removing eruptive volcanoes from the benchmark simulations reduces the amount of SO2 emitted by 1%:
     ###################################################################################
     ### Emissions totals for species SO2 [Tg]                                       ###
     ### Ref = GCC_13.3.0-rc.1; Dev = GCC_13.4.0-rc.0                                ###
     ###################################################################################
                                    Ref                 Dev           Dev - Ref    % diff
     SO2 Aircraft       :           0.019036            0.019036      0.000000     0.000
     SO2 Anthro         :           5.872509            5.872509      0.000000     0.000
     SO2 BioBurn        :           0.555350            0.555350      0.000000     0.000
     SO2 Ship           :           0.951114            0.951114      0.000000     0.000
     SO2 VolcDegas      :           1.826465            1.826465      0.000000     0.000
     SO2 VolcErupt      :           0.101063            0.000000     -0.101063  -100.000
     -----------------------------------------------------------------------------------
     SO2 Total          :           9.325534            9.224471     -0.101063    -1.084
Other changes in benchmark output related to this update are:
  • OH metrics show very small change;
  • SO2 mass changes by -9%, SO4 by -4.6%, NIT by +4.3%, NH3 by +1.5%, NH4 by -1.1%.
  • Some gas phase species show corresponding mass changes (e.g.ITCN & ITHN, +1.3%, KO2, -0.49%, MCHRN ; 5 S+0.8; *Other species mass change typically by +/- 0.5%;
  • Minor decreases in SOx concentration at surface observed over SA, Africa, Indonesia, Australia.

10. Add option for driving GEOS-Chem & GCHP with native GEOS meteorological files

Changes in benchmark output related to this update are:

  • Very small changes in OH metrics (mean OH -0.007%, MCF lifetime +0.011%, CH4 lifetime +0.011%)
  • Mostly small changes in species mass (typically less than +/- 1%), except for a few species such as ACET, ATO2, BrSALA, which are larger;
  • Minor differences in species concentration in the polar regions due to the removal of ALBEDO as a proxy for snow/ice.

11. Fix end year for CEDS NO ship emissions

A typo in the end year for CEDS_NO_SHIP caused 2010 emissions to be used for benchmark simulations instead of 2019 emissions. The impact on ship emissions is summarized below.
    ###################################################################################
    ### Emissions totals [Tg]                                                       ###
    ### Ref = GCC_13.4.0-rc.2; Dev = GCC_13.4.0-alpha.19                            ###
    ###################################################################################
                                       Ref                 Dev     Dev - Ref    % diff
    HNO3 Ship          :           1.216580            1.218035      0.001454     0.120
    NO Ship            :           0.074879            0.077218      0.002339     3.124
    NO2 Ship           :           0.638942            0.674229      0.035287     5.523

12. Fixes for numerical stability and to correct parallelization errors

Several fixes were made to correct parallelization errors and improve numerical stability. These resulted in small numerical differences in output. For more information, please see these Github issues and pull requests:


The following were zero-difference updates:

  1. GCHP-specific updates:
  2. CH4 simulation updates:
  3. Hg simulation updates:
  4. TransportTracers simulation updates:
  5. Diagnostic updates:
  6. Other updates:


Approval
Requires further investigation:
Approved by:
Date of approval:

1-month GEOS-Chem Classic version comparison (13.4.0-rc.4 vs 13.3.0-rc.1)

Below are links to plots and tables comparing 1-month simulations for GEOS-Chem Classic 13.4.0-rc.4 (Dev) and GEOS-Chem Classic 13.3.0-rc.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 (13.4.0-rc.4 vs 13.3.0-rc.1)

Below are links to plots and tables comparing 1-month simulations for GCHP 13.4.0-rc.4 (Dev) and GCHP 13.3.0-rc.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 (13.4.0-rc.4) vs. GEOS-Chem Classic (13.4.0-rc.4) comparison

Below are links to plots and tables comparing 1-month simulations for GCHP 13.4.0-rc.4 (Dev) and GEOS-Chem Classic 13.4.0-rc.4 (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 13.4.0-rc.4 - 13.3.0-rc.1 (Dev) and GEOS-Chem Classic GCHP 13.4.0-rc.4 - 13.3.0-rc.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 the GEOS-Chem Classic 1-year benchmark simulation.

Git tag(s): 13.4.0-rc.4
Compared to previous benchmark: GEOS-Chem 13.3.0-rc.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: 4° x 5°
Meteorology fields: MERRA-2 4° x 5°
Spin-up initial conditions: July 1, 2019 from 13.3.0 1-year benchmark
Benchmark date: Spin-up run: July 2018 - Dec 2018
Production run: Jan 2019 - Dec 2019

1-year fullchem GEOS-Chem Classic version comparison (13.4.0-rc.4 vs 13.3.0-rc.0)

Below are links to plots and tables comparing 1-year full-chemistry simulations for GEOS-Chem Classic 13.4.0 (Dev) and GEOS-Chem Classic 13.3.0 (Ref).

Category1 Plots Additional Information
Level Map Zonal Mean Emissions
Oxidants

O3, CO, OH, NOx

Surface 500 hPa Full column Stratosphere Full column
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 500 hPa Full column Stratosphere Full column AOD

Aerosol profiles
Aerosol burdens
Global mean AOD

Bromine

Bry, BrOx, Br, Br2, BrCl, BrNO2, BrNO3, BrO, CH4Br, CH2Br2, CH2Br2, CH3Br3, HOBr, HBr

Surface 500 hPa Full column Stratosphere Full column
Chlorine

Cly, ClOx, Cl, ClO, Cl2, Cl2O2, ClOO, ClNO2, ClNO3, CCl4, CFCs, CH3Cl, CH2Cl2, CH4CCl3, HOCl, HCl, Halons, HCFCs, OClO

Surface 500 hPa Full column Stratosphere -
Iodine

Iy, IxOy, I, I2, IBr, ICl, IO, INO2, IONO2, CH3I, CH2I2, CH2ICl, CH2IBr, HI, HOI, OIO

Surface 500 hPa Full column Stratosphere Full column
Nitrogen

NOy, NOx, HNO2, HNO3, HNO4, MPAN, NIT, NO, NO2, NO3, N2O5, MPN, PAN, PPN, N2O, NHx, NH3, NH4, MENO3, ETNO3, IPRNO3, NPRNO3

Surface 500 hPa Full column Stratosphere Full column
Primary Organics

EOH, MOH, ISOP, MTPA, MTPO, LIMO, ALK4, BENZ, CH4, C2H6, C3H8, PRPE, TOLU, XYLE

Surface 500 hPa Full column Stratosphere Full column
Secondary Organics

ACTA, ALD2, CH2O, HPALDs, MACR, IEPOX, ACET, MEK, MVK, ISOPN, GLYX, HCOOH, MAP, RCHO, MP

Surface 500 hPa Full column Stratosphere Full column
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 500 hPa Full column Stratosphere Full column
Sulfur

SOx, DMS, OCS, SO2, SO4

Surface 500 hPa Full column Stratosphere Full column
ROy

H2O2, H, H2, H2O, HO2, O1D, OH, RO2

Surface 500 hPa Full column Stratosphere -
J-values Surface 500 hPa Full column Stratosphere -
 
Emissions by HEMCO category
Emission totals
Global mass
O3 budget
Metrics
Strat-trop exchange
Model vs Observations

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):
Compared to previous benchmark: 13.2.0-beta.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: 4° x 5°
Meteorology fields: MERRA-2 4° x 5°
Spin-up initial conditions: January 1, 2019 from GEOS-Chem 13.0.0 1-year transport tracer benchmark
Benchmark date: Spinup run: Jan 2010 - Dec 2018
Production run: Jan 2019 - Dec 2019

1-year transport GEOS-Chem Classic version comparison (13.4.0-rc.1 vs 13.2.0-beta.0)

This table contains plots comparing 1-year transport tracer simulations for GEOS-Chem Classic 13.4.0-rc.1 (Dev) and GEOS-Chem Classic 13.2.0-beta.1 (Ref).

Category1 Plots
Level Map Zonal Mean
RnPbBeTracers

Rn222, Pb210, Pb210Strat, Be7, Be7Strat, Be10, Be10Strat

Surface 500 hPa Full column Stratosphere
PassiveTracers

PassiveTracer, SF6Tracer, CH3ITracer, COAnthroEmis25dayTracer, COAnthroEmis50dayTracer, COUniformEmis25dayTracer, GlobEmis90dayTracer, NHEmis90dayTracer, SHEmis90dayTrace

Surface 500 hPa Full column Stratosphere
WetLossConv

Pb210, Pb210Strat, Be7, Be7Strat, Be10, Be10Strat

Surface 500 hPa Full column Stratosphere
WetLossLS

Pb210, Pb210Strat, Be7, Be7Strat, Be10, Be10Strat

Surface 500 hPa Full column Stratosphere
 
Pb-Be Budgets GEOS-Chem 13.2.0-beta.0 (Ref): GEOS-Chem 13.4.0-rc.1 (Dev):
Strat-trop exchange GEOS-Chem 13.2.0-beta.0 (Ref): GEOS-Chem 13.4.0-rc.1(Dev):
Mass conservation Passive tracer