GEOS-Chem 12 benchmark history

On this page we have posted complete information about all benchmark simulations (both 1-month and 1-year) for GEOS-Chem 12.

1-year full-chemistry benchmarks

12.0.0-Run0

Three GEOS-Chem model versions were compared to each other:

Color	Model Version	Met Type	Year	Updates affecting the benchmark simulation	Annual Mean OH [105 molec/cm3]	O3 STE [Tg a-1]
Black	Observations
Green	12.0.0-Run0	GEOS-FP, 72L, 4x5	2016	Updates introduced in this benchmark: Turn off TRASH emissions by default to avoid double counting Add entries to HEMCO_Config.rc for SOAP and pFe in CEDS inventory Bug fix for liquid water content in gckpp_HetRates.F90 Bug fix for CH4 boundary conditions Fixed typo in call to GAMMA_HOBr_AER Correct issues when specifying DICE-Africa emissions: Avoid double-counting between DICE-Africa and other inventories Use unique names for DICE-Africa entries in the HEMCO_Config.rc file Add missing Criegee intermediate reaction Bug fix for ARCTAS_SHIP in HEMCO_Config.rc files Bug fix in FlexChem: do not zero out ACTA, EOH, HCOOH concentrations Add GFED4.1 data for 2015 and 2016; Use GFED4.1 2016 in benchmarks	11.648	606.580
Blue	v11-02f-Run1	GEOS-FP, 72L, 4x5	2016	Updates introduced in this benchmark: Update HEMCO from v2.1.001 to v2.1.005 Use global 0.25x0.25 files for MEGAN input and MODIS LAI Update lightning BETA values and OTD/LIS files for consistency with latest met fields CEDS global anthropogenic emissions (1950-2014) EDGAR v4.3.1 emissions Historical Canadian emissions Global ethane emissions Inefficient combustion emissions in Africa (DICE-Africa inventory) Trash burning emissions Update GFED4 emission factors Retire GFED3 biomass burning emissions Ammonia emissions from Arctic seabirds Restore use of prod/loss rates from GMI in the mesosphere for UCX-based simulations Fix bug in units of UCX prod/loss rates Add fix for UCX mesospheric NOy routine Fix Henry's Law parameters for HCl Fix for N2O5 uptake Add fix for organic nitrate chemistry	11.532	593.857
Red	v11-02e-Run1	GEOS-FP, 72L, 4x5	2016	Updates introduced in this benchmark: Use GEOS-FP 4x5 met fields for 2016	11.541	603.246

The output plots for this run may be downloaded from:

ftp ftp.as.harvard.edu
cd gcgrid/geos-chem/1yr_benchmarks/GC_12/12.0.0/Run0/output
mget *

You may also view the PDF files online by pointing your browser to

http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/GC_12/12.0.0/Run0/output/

Please also view the following pages comparing this version to past 1-year benchmarks:

• Global Tropospheric Aerosol Burdens
• Global Tropospheric Mean Aerosol Optical Depth

--Melissa Sulprizio (talk) 11:44, 10 August 2018 (UTC)

1-year transport tracers benchmarks

12.2.0-TransportTracers

A 1-year Transport Tracers benchmark simulation was performed using GEOS-Chem 12.2.0. The simulation utilized 4° x 5° GEOS-FP met fields for the year 2016, with a 10-year spinup.

For comparison of the Pb-210 and Be-7 budgets to previous versions, please see the following posts on the Rn-Pb-Be simulation wiki page:

1. Budget of Pb210 from 1-year benchmark simulations
2. Budget of Be7 from 1-year benchmark simulations

You may view the benchmark plots for the simulation by pointing your browser to the following link:

http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/GC_12/12.2.0/TransportTracers/output/

Benchmark comments:

• **New in 12.2.0** A suite of transport tracers was added to the Rn-Pb-Be simulation to create a new Transport Tracers simulation to facilitate comparisons of transport schemes between GEOS-Chem "Classic" and/or GCHP with the NASA GEOS-DAS system. A new AgeofAir field was also added to State_Met and saved out via the Transport diagnostic collection for diagnosing the age of air.
• The passive species (PassiveTracer) included in this benchmark and past Rn-Pb-Be benchmark simulations is used to test for mass conservation in GEOS-Chem transport. In past GEOS-Chem versions, we found that mass was not conserved when using the non-local PBL mixing scheme (VDIFF). To track the issue, we have been running the 1-year Rn-Pb-Be benchmark with and without non-local PBL mixing. However, a fix for mass conservation when using the NLPBL mixing scheme was added in GEOS-Chem 12.1.0 and the output from the 12.2.0-TransportTracers benchmark confirms that mass is now conserved for both mixing schemes.

PassiveTracer Summary for TURBDAY mixing
----------------------------------------
Max mass =  17.6750032410721 Tg
Min mass =  17.6750032410641 Tg
Abs diff =               8.0 g
Pct diff =            0.0000 %

PassiveTracer Summary for NLPBL mixing
---------------------------------------
Max mass =  17.6750032384831 Tg
Min mass =  17.6750032384776 Tg
Abs diff =               5.5 g
Pct diff =            0.0000 %

--Melissa Sulprizio (talk) 14:26, 30 January 2019 (UTC)

1-month benchmarks

12.3.0

This section includes the assessment form for the 1-month benchmark simulation of 12.3.0.

Description
New features added into GEOS-Chem	Feature Submitted by Features affecting the full-chemistry simulation: Update ISORROPIA from v2.0 to v2.2, in order to remove persistent noise in output Seb Eastham (Harvard) Updated PFT file for MEGAN Jenny Fisher (Wollongong) Dylan Millet (UMN) OMI-based Volcanic emissions 1979-2018 Cui Ge (U. Iowa) Jun Wang (U. Iowa) GCST Read in and regrid existing MODIS LAI and OLSON data via HEMCO Bob Yantosca (GCST) Update from HEMCO version 2.1.011 to 2.1.012 Bug fix for HEMCO interpolation algorithm Add option to always use simulation year for specified fields Christoph Keller (NASA/GMAO) GCST Features NOT affecting the full-chemistry simulation: Update to Yuan processed MODIS LAI product (covering years 2005-2016) Off while we investigate an issue in the HEMCO interpolation Jenny Fisher (Wollongong) Barron Henderson (US EPA) Further bug fix for netCDF diagnostics spanning leap years Bob Yantosca (GCST) Fix GFAS_SOAP entry in HEMCO_Config.rc Killian Murphy (York)
Version, resolution, met fields used:	GEOS-FP (72L), 4x5, July 2016
1-month benchmark finished on:	Thu Mar 14 06:08:16 EDT 2019
Performance statistics:	Compiled with ifort 17.0.4 Ran on 24 CPUs of holyjacob01.rc.fas.harvard.edu (Intel(R) Xeon(R) CPU E5-2680 v3 "Haswell" @ 2.50 GHz) Wall time: 10:08:05 CPU time / wall time: 20.064 % of ideal performance: 83.60% Memory: 13.5955 GB
Compared to previous benchmark:	12.2.0
This update will impact: (select all that apply with boldface)	Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify): Volcano emissions
Unit test results may be viewed at:	http://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/GC_12/12.3.0/output/GC_12.3.0_Mar14.results.html
Plots may be viewed at:	http://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/GC_12/12.3.0/output/
Metrics
Global mean OH from log file (% change):	12.5415048745052 x 105 molec/cm3 (0.13%)
Methyl chloroform lifetime (% change):	4.9406 years (-0.21%)
Methane lifetime (% change):	8.3253 years (-0.21%)
At the SURFACE, list all species that changed by 10% or more:	ISOP, HNO3, H2O2, RCHO, MVK, MACR, NPMN, PPN, R4N2, PRPE, N2O5, HNO4, SO2, SO4s, NH3, NH4, NIT, NITs, Br2, Br, BrO, HOBr, HBr, BrNO3, ISOPND, ISOPNB, MOBA, PROPNN, HAC, GLYC, MVKN, MACRN, NO3, MTPA, LIMO, MTPO, ISOG1, ISOG3, ISOA1, ISOA3, SOAP, EOH, MGLY, GLYX, HPALD, DHDN, ETHLN, HCOOH, IEPOXA, IEPOXB, IEPOXD, ISN1, RIPA, RIPB, RIPD, IMAE, SOAME, SOAGX, SOAMG, LVOC, LVOCOA, ISN1OG, ISN1OA, MONITS, MONITU, HONIT, IONITA, MONITA, IPMN, HC187, BrCl, HCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2, BrSALA, BrSALC, HOI, I2, HI, INO, IONO, I2O2, I2O3, I2O4, ISALA, ISALC, OH
Comments on SURFACE differences:	Below we summarize the notable changes caused by specific updates. Update ISORROPIA from v2.0 to v2.2 This update caused changes in NH3 and NIT at all levels. These differences are small number differences where concentrations are low. Updated PFT file for MEGAN This update caused changes in the primary and secondary organic species. Percent differences are largest over the oceans, where concentrations are low. OMI-based Volcanic emissions 1979-2018 This update caused large decreases in SO2 over and downwind of volcanic regions. This also impacted SO4, SO4s, NH3, NH4, NIT, NITs, HNO3, several bromine species near those regions. Cui Ge wrote: I saw the non-eruptive volcano emission in July of 2016 seems 0 everywhere. If the NASA online data shows this, I think it is OK to be consistent with that. Thanks for confirming this data includes both explosive and effusive eruptions. By my understanding, because volcano emission has big uncertainty (from literature also from our volcano paper), NASA team did some adjustment (the amount of volcano emission, the duration of each volcano, etc) after we published our paper. I think this updated volcano data would be the best volcano data we have for now, also we may want to keep our data to be consistent with this online source data. The AEROCOM volcano data (used in GEOS-Chem) has much bigger uncertainties. To summarize this, I think the code, the process and the data what you are using is all right. As long as we have consistent volcano data with this online source, it would be great. The following updates impacted species concentrations slightly, but the changes did not amount to >10%. Read in and regrid existing MODIS LAI and OLSON data via HEMCO Update from HEMCO version 2.1.011 to 2.1.012: Bug fix for HEMCO interpolation algorithm
At 500 hPa, list all species that changed by 10% or more:	ISOP, H2O2, MVK, MACR, NPMN, R4N2, N2O5, HNO4, SO2, SO4, SO4s, NH3, NH4, NIT, NITs, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, ISOPND, ISOPNB, MOBA, PROPNN, GLYC, MVKN, MACRN, NO3, MTPA, LIMO, MTPO, EOH, MGLY, GLYX, HPALD, DHDN, ETHLN, HCOOH, IEPOXA, IEPOXB, IEPOXD, ISN1, RIPA, RIPB, RIPD, IMAE, SOAIE, LVOC, ISN1OG, MONITS, MONITU, HONIT, IPMN, HC187, BrCl, HCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2, BrSALA, BrSALC, CH2I2, HOI, I2, ICl, I, IO, HI, OIO, INO, IONO, IONO2, I2O2, I2O3, I2O4, ISALA, ISALC
Comments on 500 hPa differences:	See comments for surface differences
In the ZONAL MEAN differences, list all species that changed by 10% or more:	NO, PAN, ISOP, HNO3, H2O2, MEK, RCHO, MVK, MACR, NPMN, PPN, R4N2, PRPE, N2O5, HNO4, MP, SO2, SO4, SO4s, NH3, NH4, NIT, NITs, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, MPN, ISOPND, ISOPNB, MOBA, PROPNN, HAC, GLYC, MVKN, MACRN, NO2, NO3, HNO2, MTPA, LIMO, MTPO, TSOG3, TSOA2, TSOA3, ISOG1, ISOG3, ISOA1, ISOA3, SOAP, EOH, MGLY, GLYX, HPALD, DHDN, ETHLN, HCOOH, IEPOXA, IEPOXB, IEPOXD, ISN1, RIPA, RIPB, RIPD, IMAE, SOAIE, SOAME, SOAGX, SOAMG, LVOC, LVOCOA, ISN1OG, ISN1OA, MONITS, MONITU, HONIT, IONITA, MONITA, IPMN, HC187, BrCl, HCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2, BrSALA, BrSALC, CH2I2, CH2IBr, HOI, I2, IBr, ICl, I, IO, HI, OIO, INO, IONO, IONO2, I2O2, I2O3, I2O4, ISALA, ISALC, OH, HO2
Comments on ZONAL MEAN differences:	See comments for surface differences
In the EMISSION RATIO maps, list all species that changed by 10% or more:	Biogenic emissions: ACET, ALD2, APIN, BCAR, BPIN, CARE, CO, EOH, FARN, ISOP, LIMO, MBOX, MONX, MYRC, OMON, OSQT, PRPE, SABI SO2 volcano emissions
Comments on EMISSION RATIO differences:	The differences in biogenic emissions are caused by updating to a new PDF file created from higher resolution data.
Additional or summary comments:
Approval
Requires further investigation:
Approved by:
Date of approval:

--Melissa Sulprizio (talk) 15:59, 14 March 2019 (UTC)

12.2.0

This section includes the assessment form for the 1-month benchmark simulation of 12.2.0.

Description
New features added into GEOS-Chem	Feature Submitted by Features affecting the full-chemistry simulation: Retire BRAVO emissions and use CEDS for Mexico instead Melissa Sulprizio (GCST) Update mask file applied to NEI2011 emissions Melissa Sulprizio (GCST) Features NOT affecting the full-chemistry simulation: Transport Tracers simulation: a common set of tracers in GEOS-Chem and GEOS Transport WG Melissa Sulprizio (GCST) ObsPack diagnostic Andy Jacobson (NOAA/ESRL) Bob Yantosca (GCST) GFAS biomass burning emissions (as an option) Mat Evans (York) Killian Murphy (York) Fix bug in stratosperic aerosol surface area netcdf diagnostics Jonathan Moch (Harvard) Christoph Keller (GMAO) Update from HEMCO 2.1.010 to HEMCO 2.1.011: Now wrap the remaining HEMCO extensions in instances (to facilitate running in HPC environments) Update HEMCO standalone for compatibility with FlexGrid met field names GCST Features affecting GCHP only: Update ESMF version from v5.2.0rp2 to v7.1.0r Lizzie Lundgren (GCST) New fields in GCHP output restart file Lizzie Lundgren (GCST) Bug fix: use checkpoint output file as subsequent run restart Lizzie Lundgren (GCST)
Version, resolution, met fields used:	GEOS-FP (72L), 4x5, July 2016
1-month benchmark finished on:	Sat Jan 26 05:39:11 EST 2019
Performance statistics:	Compiled with ifort 17.0.4 Ran on 24 CPUs of holyjacob01.rc.fas.harvard.edu (Intel(R) Xeon(R) CPU E5-2680 v3 "Haswell" @ 2.50 GHz) Wall time: 09:06:46 CPU time / wall time: 20.2766 % of ideal performance: 84.49% Memory: 13.1582 GB
Compared to previous benchmark:	12.1.0
This update will impact: (select all that apply with boldface)	Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify):
Unit test results may be viewed at:	http://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/GC_12/12.2.0/output/GC_12.2.0_Jan25.results.html
Plots may be viewed at:	http://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/GC_12/12.2.0/output/
Metrics
Global mean OH from log file (% change):	12.5253573268589 x 105 molec/cm3 (0.016%)
Methyl chloroform lifetime (% change):	4.9508 years (-0.022%)
Methane lifetime (% change):	8.3429 years (-0.023%)
At the SURFACE, list all species that changed by 10% or more:	NO, PAN, ALK4, ISOP, HNO3, MEK, RCHO, MVK, MACR, NPMN, PPN, R4N2, PRPE, C3H8, CH2O, N2O5, HNO4, MP, DMS, SO2, SO4, NH3, NH4, NIT, BCPI, OCPI, BCPO, OCPO, BrO, BrNO2, BrNO3, MPN, ISOPND, ISOPNB, MOBA, PROPNN, MVKN, MACRN, MAP, NO2, NO3, HNO2, BENZ, TOLU, XYLE, MTPA, LIMO, MTPO, TSOG1, TSOG3, TSOG0, TSOA1, TSOA2, TSOA3, TSOA0, ISOA1, ISOA2, ISOA3, ASOA1, ASOA3, SOAP, SOAS, HPALD, DHDN, ETHLN, IEPOXA, IEPOXB, IEPOXD, ISN1, RIPA, RIPB, RIPD, IMAE, SOAIE, SOAME, LVOC, ISN1OG, ISN1OA, MONITS, MONITU, HONIT, IONITA, MONITA, INDIOL, IPMN, BrCl, HCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2, BrSALA, BrSALC, HOI, I2, I, IO, HI, OIO, INO, IONO, IONO2, I2O2, I2O3, I2O4, pFe, OH
Comments on SURFACE differences:	All differences can be attributed to updating the US mask file and retiring BRAVO emissions and using CEDS for Mexico instead. These changes impacted species concentrations at the surface over southern Canada and northern Mexico for several species with anthropogenic emissions. These changes propagated downwind and throughout the troposphere. See more details in the comments for emission differences below.
At 500 hPa, list all species that changed by 10% or more:	ISOP, MVK, MACR, NPMN, PRPE, DMS, NH3, NIT, OCPI, OCPO, HBr, ISOPND, ISOPNB, MOBA, MACRN, XYLE, MTPA, LIMO, MTPO, TSOA2, TSOA3, ISOA3, SOAP, HPALD, ETHLN, IEPOXB, ISN1, RIPA, RIPB, RIPD, LVOC, ISN1OG, MONITU, IPMN, ClNO2, OClO, Cl2, Cl2O2, BrSALA, BrSALC, CH2I2, I2O4, pFe
Comments on 500 hPa differences:	See comments for surface differences The differences in NH3 and NIT at 500 hPa can be attributed to numerical noise from ISORROPIA
In the ZONAL MEAN differences, list all species that changed by 10% or more:	NO, PAN, ALK4, ISOP, HNO3, MEK, ALD2, RCHO, MVK, MACR, NPMN, PPN, R4N2, PRPE, C3H8, CH2O, N2O5, HNO4, MP, DMS, SO2, SO4, SO4s, NH3, NH4, NIT, BCPI, OCPI, BCPO, OCPO, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, MPN, ISOPND, ISOPNB, MOBA, PROPNN, MVKN, MACRN, MAP, NO2, NO3, HNO2, BENZ, TOLU, XYLE, MTPA, LIMO, MTPO, TSOG1, TSOG3, TSOG0, TSOA1, TSOA2, TSOA3, TSOA0, ISOA1, ISOA2, ISOA3, ASOA1, ASOA3, SOAP, SOAS, EOH, HPALD, DHDN, ETHLN, IEPOXA, IEPOXB, IEPOXD, ISN1, RIPA, RIPB, RIPD, IMAE, SOAIE, SOAME, LVOC, ISN1OG, ISN1OA, MONITS, MONITU, HONIT, IONITA, MONITA, INDIOL, IPMN, HC187, BrCl, HCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2, BrSALA, BrSALC, CH2I2, HOI, I2, ICl, I, IO, HI, OIO, INO, IONO, IONO2, I2O2, I2O3, I2O4, pFe, OH
Comments on ZONAL MEAN differences:	See comments for surface differences Most differences aloft are small and are located around 30°N and 60°N, corresponding to the changes in emissions over Mexico and Canada. The >10% differences for many species listed above are primarily in regions were concentrations are very low (e.g. above 200 hPa).
In the EMISSION RATIO maps, list all species that changed by 10% or more:	Anthropogenic emissions: ACET, ALD2, ALK4, BC, BENZ, C3H8, CH2O, CO, EOH, MEK, NH3, NO, OC, PRPE, SO2, SO4, TOLU, XYLE
Comments on EMISSION RATIO differences:	Differences in anthropogenic emissions are observed near the US border in southern Canada and northern Mexico. These differences are caused by: Updating the US mask file applied to NEI2011 emissions. The NEI2011 emissions extend into Canada and Mexico, but the new mask file introduced in this version ensures NEI2011 emissions are only applied over the contiguous US and CEDS emissions are used for Canada and Mexico. APEI emissions are used for Canada for species included in that inventory (NO, CO, SO2, SO4, NH4, BC, and OC). Retiring BRAVO emissions and using CEDS for Mexico instead. In earlier GEOS-Chem versions, BRAVO emissions were only applied to one 4° x 5° grid box over Baja California, which was not covered by the older NEI2011 mask file. Retiring BRAVO impacted NO, CO, SO2, and SO4 emissions over that one grid box.
Additional or summary comments:	The wall time, scalability, and memory usage for this benchmark increased from 12.0.0. This is primarily because this benchmark saves out monthly netCDF diagnostics in HISTORY.rc. In addition, there are ongoing issues on the /n/regal/ scratch disk on Harvard's Odyssey cluster which have been found to negatively impact job performance. An 1-month benchmark for 12.2.0 was also done with gfortran 8.2.0 for comparison with the official benchmark using ifort 17.0.4. The change in compiler produces essentially no change in output, except perhaps at the level of numerical noise. Compiler # Cores Wall Time [hh:mm:ss] CPU time / Wall time % Ideal Memory [GB] Global Mean OH [molec/cm3] MCF lifetime [a] ifort 17.0.4 24 8:36:56 20.5517 85.63% 13.1714 12.5236147781285 4.9817 gfortran 8.2.0 24 8:29:21 18.2056 75.86% 11.8865 12.523614312375907 4.9817 In the table above, the run with gfortran 8.2.0 has comparable wall time to the run with ifort 17.0.4. CPU time / Wall time and & ideal were lower in the gfortran run, likely because gfortran cannot fully take advantage of in-chip optimizations available on Intel CPUs. A 1-year Transport Tracers benchmark simulation was also performed for this version. Please see this wiki post for more details.
Approval
Requires further investigation:	No
Approved by:	Daniel Jacob
Date of approval:	14 Feb 2019

--Melissa Sulprizio (talk) 23:30, 28 January 2019 (UTC)

12.1.0

This section includes the assessment form for the 1-month benchmark simulation of 12.1.0.

Description
New features added into GEOS-Chem	Feature Submitted by Features affecting the full-chemistry simulation: Budget diagnostics Lizzie Lundgren (GCST) Chris Holmes (Florida State) Anthropogenic PM2.5 dust source Sajeev Philip (Dalhousie) GEOS-Chem restart file updates Melissa Sulprizio (GCST) Updates and fixes for the CEDS anthropogenic emissions inventory: Add missing RCO sector to CEDS emissions entries Include CEDS ship emissions as default global ship emissions inventory Reduce file size for CEDS inventory Pengfei Liu (Harvard) Melissa Sulprizio (GCST) Jiawei Zhuang (Harvard) HEMCO fixes: HEMCO bug fix: prevent excessive attempts to read the HEMCO restart file when using GEOS-Chem "Classic" Add fix for collapsing model levels to reduced grid Fix unit conversion in HCO_UNIT_GetAreaScal GCST Fix mass conservation in non-local PBL mixing Jintai Lin (PKU) Allow for SZA to 98 degrees when getting photolysis rates Eric Fleming (GMAO) Features NOT affecting the full-chemistry simulation: FlexGrid Stage 1: Use HEMCO to read met fields Jiawei Zhuang (Harvard) Jintai Lin (PKU) Add fixes for seasonal scale factors in CH4 simulations Bram Maasakkers (SRON) Melissa Sulprizio (GCST) Convert input data for RRTMG from bpch to netCDF for input via HEMCO Bob Yantosca (GCST) Added netCDF diagnostics in the following areas: CH4 simulation CO2 simulation Persistent Organic Pollutants (POPS) simulation Mercury simulation netCDF diagnostics for mercury are partially implemented in 12.1.0; to be completed in 12.2.0 Bob Yantosca (GCST) Add support for continuous integration with TravisCI – automatically test each commit as soon as it is pushed to Github Jiawei Zhuang (Harvard) Bob Yantosca (GCST) Move Fast-JX .dat files from the geos-chem-unittest repository to gcgrid/ExtData Chris Holmes (Florida State) GCST Update HEMCO configuration file for the tagged CO simulation Bob Yantosca (GCST) Structural updates to facilitate interfacing GEOS-Chem into WRF Haipeng Lin (Peking U) GCST Structural updates to facilitate interfacing GEOS-Chem into GEOS-5 Christoph Keller (GMAO) Lizzie Lundgren (GCST) Features affecting GCHP only: Fix masking bug to correctly apply anthropogenic emissions Lizzie Lundgren (GCST) Remove erroneous 180 degree longitude shift in APEI regridding Lizzie Lundgren (GCST) Move GCHP run directory creation from GEOS-Chem Unit Tester to GCHP repository Lizzie Lundgren (GCST)
Version, resolution, met fields used:	GEOS-FP (72L), 4x5, July 2016
1-month benchmark finished on:	Wed Nov 21 16:48:07 EST 2018
Performance statistics:	Compiled with ifort 17.0.4 NOTE: Updated from Intel 11.1.069 Ran on 24 CPUs of holyjacob01.rc.fas.harvard.edu (Intel(R) Xeon(R) CPU E5-2680 v3 "Haswell" @ 2.50 GHz) Wall time: 06:10:38 CPU time / wall time: 23.2185 % of ideal performance: 96.74 Memory: 8.7716 GB
Compared to previous benchmark:	12.0.0
This update will impact: (select all that apply with boldface)	Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify):
Unit test results may be viewed at:	http://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/GC_12/12.1.0/output/GC_12.1.0_Nov21.results.html
Plots may be viewed at:	http://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/GC_12/12.1.0/output/
Metrics
Global mean OH from log file (% change):	12.5233901731440 x 105 molec/cm3 (-0.40%)
Methyl chloroform lifetime (% change):	4.9519 years (0.73%)
Methane lifetime (% change):	8.3448 years (0.75%)
At the SURFACE, list all species that changed by 10% or more:	NO, O3, PAN, CO, ALK4, ISOP, HNO3, H2O2, ACET, MEK, ALD2, RCHO, MVK, MACR, NPMN, PPN, R4N2, PRPE, C3H8, CH2O, C2H6, N2O5, HNO4, MP, DMS, SO2, SO4, SO4s, MSA, NH3, NH4, NIT, NITs, BCPI, OCPI, BCPO, OCPO, DST1, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, MPN, ISOPND, ISOPNB, MOBA, PROPNN, HAC, GLYC, MVKN, MACRN, MAP, NO2, NO3, HNO2, BENZ, TOLU, XYLE, MTPA, LIMO, MTPO, TSOG1, TSOG2, TSOG3, TSOG0, TSOA1, TSOA2, TSOA3, TSOA0, ISOG1, ISOG3, ISOA1, ISOA2, ISOA3, ASOG1, ASOG2, ASOG3, ASOAN, ASOA1, ASOA2, ASOA3, SOAP, SOAS, EOH, MGLY, GLYX, ACTA, HPALD, DHDN, ETHLN, HCOOH, IEPOXA, IEPOXB, IEPOXD, ISN1, RIPA, RIPB, RIPD, IMAE, SOAIE, SOAME, SOAGX, SOAMG, LVOC, LVOCOA, ISN1OG, ISN1OA, MONITS, MONITU, HONIT, IONITA, MONITA, INDIOL, IPMN, HC187, BrCl, HCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2, BrSALA, BrSALC, CH2I2, CH2ICl, CH2IBr, HOI, I2, IBr, ICl, I, IO, HI, OIO, INO, IONO, IONO2, I2O2, I2O3, I2O4, ISALA, ISALC, AERI, pFe, OH, HO2
Comments on SURFACE differences:	Below we summarize the notable changes caused by specific updates. Anthropogenic PM2.5 dust source (aka AFCID) This update introduced a large increase in DST1 concentrations globally. The AFCID inventory adds ~1.1 Tg per month (= ~13 Tg/yr) to the DST1 species. Updates and fixes for the CEDS anthropogenic emissions inventory These updates introduced large changes for many species by introducing a missing anthropogenic emissions sector and adding ship emissions for many species that did not previously have ship emissions. The ship emissions update dominates and can be seen as large changes in species concentrations over the oceans. Adding the RCO sector greatly increases (>100% change) species concentrations over land for OCPO, OCPI, BENZ, TOLU, XYLE, TSOA*, ISOA*, ASOA*, SOAP, SOAS, EOH, GLYX, HCOOH, globally HEMCO bug fix: prevent excessive attempts to read the HEMCO restart file when using GEOS-Chem "Classic" This fix increased concentrations for many species over land by increasing biogenic emissions (see comments on emission ratios below). Allow for SZA to 98 degrees when getting photolysis rates This update caused changes in species concentrations near the poles for NO, NPMN, N2O5, HNO4, ISOPND, PROPNN, NO2, NO3, HNO2, ISN1, LVOC, ISN1OG, MONITS, MONITU, HONIT, OH, HO2, and many of the Br, Cl, and I species. The following updates impacted species concentrations slightly, but the changes did not amount to >10%. Budget diagnostics for the troposphere, PBL, and full column GEOS-Chem restart file updates Add fix for collapsing model levels to reduced grid Fix mass conservation in non-local PBL mixing
At 500 hPa, list all species that changed by 10% or more:	NO, PAN, ALK4, ISOP, MEK, ALD2, RCHO, MVK, MACR, NPMN, PPN, R4N2, PRPE, C3H8, CH2O, N2O5, HNO4, MP, DMS, SO2, SO4s, NH3, NIT, NITs, BCPI, OCPI, BCPO, OCPO, DST1, DST4, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, MPN, ISOPND, ISOPNB, MOBA, PROPNN, HAC, GLYC, MVKN, MACRN, MAP, NO2, NO3, HNO2, BENZ, TOLU, XYLE, MTPA, LIMO, MTPO, TSOG1, TSOG2, TSOG3, TSOG0, TSOA1, TSOA2, TSOA3, TSOA0, ISOG1, ISOG3, ISOA1, ISOA2, ISOA3, ASOG1, ASOG2, ASOG3, ASOAN, ASOA1, ASOA2, ASOA3, SOAP, SOAS, EOH, MGLY, GLYX, ACTA, HPALD, DHDN, ETHLN, HCOOH, IEPOXA, IEPOXB, IEPOXD, ISN1, RIPA, RIPB, RIPD, IMAE, SOAIE, SOAME, SOAGX, SOAMG, LVOC, LVOCOA, ISN1OG, ISN1OA, MONITS, MONITU, HONIT, IONITA, MONITA, INDIOL, IPMN, HC187, BrCl, HCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2, BrSALA, BrSALC, CH2I2, CH2ICl, CH2IBr, I2, IBr, ICl, I, IO, HI, OIO, INO, IONO, IONO2, I2O2, I2O3, I2O4, pFe, OH, HO2
Comments on 500 hPa differences:	See comments for surface differences
In the ZONAL MEAN differences, list all species that changed by 10% or more:	NO, O3, PAN, CO, ALK4, ISOP, HNO3, H2O2, ACET, MEK, ALD2, RCHO, MVK, MACR, NPMN, PPN, R4N2, PRPE, C3H8, CH2O, C2H6, N2O5, HNO4, MP, DMS, SO2, SO4, SO4s, MSA, NH3, NH4, NIT, NITs, BCPI, OCPI, BCPO, OCPO, DST1, DST2, DST3, DST4, SALC, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, CHBr3, MPN, ISOPND, ISOPNB, MOBA, PROPNN, HAC, GLYC, MVKN, MACRN, MAP, NO2, NO3, HNO2, BENZ, TOLU, XYLE, MTPA, LIMO, MTPO, TSOG1, TSOG2, TSOG3, TSOG0, TSOA1, TSOA2, TSOA3, TSOA0, ISOG1, ISOG2, ISOG3, ISOA1, ISOA2, ISOA3, ASOG1, ASOG2, ASOG3, ASOAN, ASOA1, ASOA2, ASOA3, SOAP, SOAS, EOH, MGLY, GLYX, ACTA, HPALD, DHDN, ETHLN, HCOOH, IEPOXA, IEPOXB, IEPOXD, ISN1, RIPA, RIPB, RIPD, IMAE, SOAIE, SOAME, SOAGX, SOAMG, LVOC, LVOCOA, ISN1OG, ISN1OA, MONITS, MONITU, HONIT, IONITA, MONITA, INDIOL, IPMN, HC187, OCS, BrCl, HCl, H2402, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2, H2O, BrSALA, BrSALC, CH3I, CH2I2, CH2ICl, CH2IBr, HOI, I2, IBr, ICl, I, IO, HI, OIO, INO, IONO, IONO2, I2O2, I2O3, I2O4, ISALA, ISALC, AERI, pFe, OH, HO2
Comments on ZONAL MEAN differences:	See comments for surface differences
In the EMISSION RATIO maps, list all species that changed by 10% or more:	Anthropogenic + biofuel : ALD2, ALK4, BC, BENZ, C3H8, CH2O, CO, EOH, MEK, NH3, NO, OC, PRPE, SO2, SO4, TOLU, XYLE Biogenic: ACET, ALD2, APIN, BCAR, BPIN, CARE, CO, EOH, FARN, ISOP, LIMO, MBOX, MONX, MYRC, OMON, OSQT, PRPE, SABI Ship: CO, NO, SO2 DST1 emissions Lightning NO
Comments on EMISSION RATIO differences:	The fix to add the missing RCO sector to CEDS emissions entries increased the anthropogenic emissions over land for several species. Changing the default global ship emissions inventory to CEDS caused changes in ship CO, NO, and SO2 emissions. This update also introduced ship emissions for several species, including NH3, BC, OC, CO2, EOH, C2H6, C3H8, ALK4, C2H4, PRPE, C2H2, BENZ, TOLU, XYLE, CH2O, ALD2, MEK, and HCOOH. The HEMCO bug fix to prevent excessive attempts to read the HEMCO restart file when using GEOS-Chem "Classic" caused the increase in biogenic emissions that we observe in this benchmark. Reading the HEMCO restart file every time step impacted the MEGAN emission because certain variables were always being overwritten with initial conditions instead of being allowed to evolve with time. This bug impacted versions 12.0.0 through 12.0.3. As a result of fixing this bug, ISOP emissions increased by ~8 Tg C and MONX by ~1 Tg C. Emissions changes for other biogenic species were minor (< 0.75 Tg C). The addition of the anthropogenic PM2.5 dust source caused the increase in DST1 emissions. The change in lightning NOx emissions near 60S is caused by the HEMCO fix for regridding levels.
Additional or summary comments:	Important new features in this version that do not impact benchmark output include: Add support for TravisCI to automatically test each commit as soon as it is pushed to Github NetCDF diagnostics for several specialty simulations, including CH4 simulation, CO2 simulation, POPs simulation, and Mercury simulation The switch from ifort 11.1.069 to ifort 17.0.4 produces essentially no change in output, except perhaps at the level of numerical noise. The data below were obtained from 1-month benchmark simulations with GEOS-Chem 12.0.0 submitted by Melissa Sulprizio: Compiler # Cores Wall Time [hh:mm:ss] CPU time / Wall time % Ideal Memory [GB] Global Mean OH [molec/cm3] MCF lifetime [a] ifort 11.1.069 24 6:04:37 22.2942 98.29% 7.1892 12.4148399780817 4.9852 ifort 17.0.4 24 5:22:46 23.1919 96.63% 7.4660 12.4148067059835 4.9852 In the table above, the run with ifort 17.0.4 was approximately a half-hour faster than the run with ifort 11.1.069. This is because the ifort 11 compiler is at least 10 years old and cannot take advantage of in-chip optimizations available in more recent Intel CPUs such as Haswell, Broadwell, Knights Landing, etc.
Approval
Requires further investigation:	No
Approved by:	Daniel Jacob
Date of approval:	23 Nov 2018

--Melissa Sulprizio (talk) 22:37, 21 November 2018 (UTC)

12.0.0

This section includes the assessment form for the 1-month benchmark simulation of 12.0.0.

Description
New features added into GEOS-Chem	Feature Submitted by Features affecting the full-chemistry simulation: Turn off TRASH emissions by default to avoid double counting GCST Eloise Marais (U. Birmingham) Add entries to HEMCO_Config.rc for SOAP and pFe in CEDS inventory GCST Bug fix for liquid water content in gckpp_HetRates.F90 Jiayue Huang (U. Washington) Quanjie Chen (U. Washington) Bug fix for CH4 boundary conditions Lee Murray (Rochester) Fixed typo in call to GAMMA_HOBr_AER Xuan Wang GCST Correct issues when specifying DICE-Africa emissions: Avoid double-counting between DICE-Africa and other inventories Use unique names for DICE-Africa entries in the HEMCO_Config.rc file Eloise Marais (U. Birmingham) GCST Add missing Criegee intermediate reaction Xin Chen (UMN) Bug fix for ARCTAS_SHIP in HEMCO_Config.rc files Barron Henderson (EPA) Avoid double counting CEDS and GEIA NH3 biofuel emissions Christoph Keller (NASA/GMAO) GCST Bug fix in FlexChem: do not zero out ACTA, EOH, HCOOH concentrations Katie Travis (MIT) Add GFED4.1 data for 2015 and 2016; Use GFED4.1 2016 in benchmarks Kate O'Dell (CSU) GCST Features NOT affecting the full-chemistry simulation: Minor fixes for mercury chemistry updates implemented in v11-02f Colin Thackray (Harvard) Restore default timestep for MERRA-2 nested grid simulations to 10/20 Ke Li (Harvard) Remove duplicate C3HI spectrum in FJX_spec.dat and FJX_j2j.dat Tomas Sherwen (York) Fixed typo that prevented PM2.5 from being archived to netCDF output Jonathan Moch (Harvard) GCST Bring two-way nested-grid code option up-to-date Yingying Yan (PKU) Jintai Lin (PKU) Do not force L=1 by default in planeflight_mod.F Katie Travis (MIT) GCST Add PH2O2 to the default list of prod/loss families in the KPP mechanisms GCST Update to HEMCO v2.1.007, which includes minor updates: Stop with error if multiple containers have the same name Bug fix for distributing emissions in the vertical dimension Add extra error checks in HEMCO standalone module Remove null string character from netCDF unit string Bug fix for HEMCO soil NOx error with ifort 17 GCST Christoph Keller Jenny Fisher Bug fix for reference time in netCDF diagnostic files GCST Updates for QFED biomass burning emissions: Update to QFED v2.5r1 Fix QFED v2.4r6 files for 2016/10/13 Christoph Keller (NASA GMAO) Fix issues in complexSOA and complexSOA_SVPOA restart files Eloise Marais (U. Birmingham) Bug fixes for v11-02 simulations using the RRTMG radiative transfer model Chris Holmes (U. Florida) Now always declare the netCDF time variable with an unlimited dimension Chris Holmes (U. Florida)
Version, resolution, met fields used:	GEOS-FP (72L), 4x5, July 2016
1-month benchmark finished on:	Mon Jul 30 21:05:43 EDT 2018
Performance statistics:	Compiled with ifort 11.1.069 Ran on 24 CPUs of holyjacob01.rc.fas.harvard.edu (Intel(R) Xeon(R) CPU E5-2680 v3 "Haswell" @ 2.50 GHz) Wall time: 06:38:04 CPU time / wall time: 21.9237 % of ideal performance: 91.35% Memory: 7.3247 GB
Compared to previous benchmark:	v11-02-rc
This update will impact: (select all that apply with boldface)	Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify):
Unit test results may be viewed at:	http://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/GC_12/12.0.0/output/GC_12.0.0.results.html
Plots may be viewed at:	http://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/GC_12/12.0.0/output/
Metrics
Global mean OH from log file (% change):	12.5734575378792 x 105 molec/cm3 (+1.80%)
Methyl chloroform lifetime (% change):	4.9162 years (-1.91%)
Methane lifetime (% change):	8.2830 years (-1.85%)
O3 STE flux (% change):	495.1870 Tg O3/year (-0.18%)
At the SURFACE, list all species that changed by 10% or more:	NO, O3, PAN, CO, ALK4, ISOP, HNO3, H2O2, ACET, MEK, ALD2, RCHO, MVK, MACR, NPMN, PPN, R4N2, PRPE, C3H8, CH2O, C2H6, N2O5, HNO4, MP, DMS, SO2, SO4, SO4s, NH3, NH4, NIT, NITs, BCPI, BCPO, OCPI, OCPO, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, MPN, ISOPND, ISOPNB, MOBA, PROPNN, HAC, GLYC, MVKN, MACRN, MAP, NO2, NO3, HNO2, BENZ, TOLU, XYLE, MTPA, LIMO, MTPO, TSOG*, TSOA*, ISOG*, ISOA*, ASOG*, ASOA*, SOAP, SOAS, EOH, MGLY, GLYX, ACTA, HPALD, DHDN, ETHLN, HCOOH, IEPOX*, ISN1, RIP*, IMAE, SOAIE, SOAME, SOAGX, SOAMG, LVOC, LVOCOA, ISN1OG, ISN1OA, MONITS, MONITU, HONIT, MONITA, INDIOL, IPMN, HC187, BrCl, HCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2, BrSALA, BrSALC, CH2I2, CH2ICl, CH2IBr, HOI, I2, IBr, ICl, I, IO, HI, OIO, INO, IONO, IONO2, I2O2, I2O3, I2O4, ISALA, ISALC, AERI, pFe, OH, HO2
Comments on SURFACE differences:	Below we summarize the notable changes caused by specific updates. Turn off TRASH emissions by default to avoid double counting This update resulted in slightly reduced concentrations over land for many species. Add entries to HEMCO_Config.rc for SOAP and pFe in CEDS inventory This fix caused increases in SOAP, SOAS, and pFe concentrations globally. Bug fix for CH4 boundary conditions This fix resulted in increased CH4 concentrations in the troposphere. Bug fix for liquid water content in gckpp_HetRates.F90 This fix reduced many Br and Cl species concentrations globally while increasing HBr, BrSALA, and BrSALC. Fix typo in call to GAMMA_HOBr_AER This fix caused slight changes in Br and Cl species concentrations, mainly over the oceans Fixes to DICE-Africa emissions These updates primarily caused increases in species concentrations near the surface over and downwind of Africa. This fix caused large increases in ACTA and HCOOH at all levels Add GFED4.1 data for 2016 and 2016 Updating the GFED4 year from 2014 to 2016 caused >10% increases and decreases in species concentrations over land globally. The following updates impacted species concentrations slightly, but the changes did not amount to >10%. Add missing Criegee intermediate reaction Bug fix for ARCTAS_SHIP in HEMCO_Config.rc files
At 500 hPa, list all species that changed by 10% or more:	NO, PAN, CO, ALK4, ISOP, HNO3, ACET, MEK, ALD2, RCHO, MVK, MACR, NPMN, PPN, R4N2, PRPE, C3H8, C2H6, N2O5, HNO4, MP, DMS, SO2, SO4, NH3, NH4, NIT, NITs, BCPI, BCPO, OCPI, OCPO, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, MPN, ISOPND, ISOPNB, MOBA, PROPNN, HAC, GLYC, MVKN, MACRN, MAP, NO2, NO3, HNO2, BENZ, TOLU, XYLE, MTPA, LIMO, MTPO, TSOG*, TSOA*, ISOG*, ISOA*, ASOG*, ASOA*, SOAP, SOAS, EOH, MGLY, GLYX, ACTA, HPALD, DHDN, ETHLN, HCOOH, IEPOX*, ISN1, RIP*, IMAE, SOAIE, SOAME, SOAGX, SOAMG, LVOC, LVOCOA, ISN1OG, ISN1OA, MONITS, MONITU, HONIT, MONITA, INDIOL, IPMN, HC187, BrCl, HCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2, BrSALA, BrSALC, CH2I2, CH2ICl, CH2IBr, HOI, I2, IBr, ICl, I, IO, HI, OIO, INO, IONO, IONO2, I2O2, I2O3, I2O4, pFe, OH
Comments on 500 hPa differences:	See comments for surface differences
In the ZONAL MEAN differences, list all species that changed by 10% or more:	NO, PAN, CO, ALK4, ISOP, HNO3, H2O2, ACET, MEK, ALD2, RCHO, MVK, MACR, NPMN, PPN, R4N2, PRPE, C3H8, CH2O, C2H6, N2O5, HNO4, MP, DMS, SO2, SO4, SO4s, NH3, NH4, NIT, NITs, BCPI, BCPO, OCPI, OCPO, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, MPN, ISOPND, ISOPNB, MOBA, PROPNN, HAC, GLYC, MVKN, MACRN, MAP, NO2, NO3, HNO2, BENZ, TOLU, XYLE, MTPA, LIMO, MTPO, TSOG*, TSOA*, ISOG*, ISOA*, ASOG*, ASOA*, SOAP, SOAS, EOH, MGLY, GLYX, ACTA, HPALD, DHDN, ETHLN, HCOOH, IEPOX*, ISN1, RIP*, IMAE, SOAIE, SOAME, SOAGX, SOAMG, LVOC, ISN1OG, ISN1OA, MONITS, MONITU, HONIT, IONITA, MONITA, INDIOL, IPMN, HC187, CH4, BrCl, HCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2, BrSALA, BrSALC, CH2I2, CH2IBr, HOI, I2, ICl, I, IO, HI, OIO, INO, IONO, IONO2, I2O2, I2O3, I2O4, pFe, OH, HO2
Comments on ZONAL MEAN differences:	See comments for surface differences
In the EMISSION RATIO maps, list all species that changed by 10% or more:	Anthropogenic emissions: ACET, ALD2, ALK4, C3H8, CO, MEK, NH3, NO, OC, PRPE, SO2, SO4, XYLE Biomass burning emissions: ACET, ALD2, ALK4, BC, BENZ, C2H6, C3H8, CH2O, CO, EOH, MEK, MTPA, NH3, NO, OC, PRPE, SO2, TOLU, XYLE NO fertilizer & soil emissions SO2 ship emissions
Comments on EMISSION RATIO differences:	Anthropogenic emissions of many species increased over Africa. This is caused by the two fixes applied to DICE-Africa emissions. Biomass burning emissions for all species changed because of the update to GFED4.2 2016 emissions. NO fertilizer and soil emissions changed slightly because of changes in NOx concentrations. The change in ship SO2 emissions is caused by the bug fix in ARCTAS_SHIP SO2 scale factors.
Additional or summary comments:
Approval
Requires further investigation:	No
Approved by:	GCST
Date of approval:	02 Aug 2018

--Melissa Sulprizio (talk) 17:10, 31 July 2018 (UTC)

GCHP benchmarks

TBD