Benchmark/GEOS-FP 5.25
This page includes information about benchmark simulations comparing GEOS-FP 5.22.0 meteorology to GEOS-FP 5.25.1 meteorology using GEOS-Chem 12.8.0.
Major update to GEOS-FP meteorology
NASA’s Global Modeling and Assimilation Office (GMAO) announced a major update to the GEOS-FP (“Forward-processing”) data stream. The switchover to GEOS-FP version 5.25.1 occurred on January 30, 2020. This new version contains the following updates to the GCM:
- New convection scheme: The RAS convection scheme used to date has now been replaced with Grell & Freitas deep convection plus Park & Bretherton shallow convection.
- New radiation scheme: The Chou-Suarez shortwave model has been replaced by RRTMG.
For more details, please read the full announcement about the update to GEOS-FP 5.25.1.
Because the GEOS-FP meteorological product is an operational dataset, system changes and updates such as these are made at regular intervals. This ensures that the GEOS-FP data product reflects the state of the science. If you use GEOS-FP met fields to drive GEOS-Chem simulations for model dates after January 30, 2020, note that the convection and radiation variables might show substantial differences with respect to prior dates.
The benchmark simulations below can be used to assess the impacts of this GEOS-FP system update.
If you would prefer using a meteorology product that does not contain any system changes, then consider using the GMAO MERRA-2 reanalysis product. MERRA-2 has a native resolution of 0.5 degree x 0.625 degree native resolution, and is generated with a “frozen” assimilation system based on the GEOS GCM version 5.12.4. There are more than 30 years of assimilated MERRA-2 data available (~1980-present) for you to use with GEOS-Chem.
1-month full-chemistry benchmark plots
Enable PDF bookmarks1 in the files linked below to navigate between species. See the Species in GEOS-Chem wiki page for species definitions and details.
| Species Category2 | 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, BCPI, BCPO, OCPI, OCPO, AERI, BrSALA, BrSALC, ISALA, ISALC, NITs, SALA, SALC, SO4s, Simple_SOA, Complex_SOA |
sfc | 500hPa | full column | stratosphere | sfc | AOD |
| Bromine
Bry, BrOx, Br, Br2, BrCl, BrNO2, BrNO3, BrO, CH3Br, CH2Br2, CHBr3, HOBr, HBr |
sfc | 500hPa | full column | stratosphere | sfc | |
| 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 | sfc | |
| 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 | sfc | |
| Primary Organics
EOH, MOH, ISOP, MTPA, MTPO, LIMO, ALK4, BENZ, CH4, C2H6, C3H8, PRPE, TOLU, XYLE |
sfc | 500hPa | full column | stratosphere | sfc | |
| Secondary Organics
ACTA, ALD2, CH2O, HPALDs, MACR, IEPOX, ACET, MEK, MVK, ISOPN, GLYX, HCOOH, MAP, RCHO, MP |
sfc | 500hPa | full column | stratosphere | sfc | |
| 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 | sfc | |
| Sulfur
SOx, DMS, OCS, SO2, SO4 |
sfc | 500hPa | full column | stratosphere | sfc | |
| 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 | |||||
| Global mass | Entire atmosphere | |||||
| Metrics | OH concentration, MCF lifetime, CH4 lifetime | |||||
| Budget tables |
Budget totals by vertical region | |||||
1All plots created with GCPy have PDF bookmarks. If you do not see them in your browser try using a different browser (not Safari) or installing an Adobe Acrobat plug-in.
2Species category and lumped species definitions are simple to adjust. Updating them requires only editing the YAML files.
1-month Transport Tracer benchmark
| Species Category2 | Plots | |||
|---|---|---|---|---|
| Level Map | Zonal Mean | |||
| RnPbBeTracers
Rn222, Pb210, Pb210Strat, Be7, Be7Strat, Be10, Be10Strat |
sfc | 500hPa | full column | stratosphere |
| PassiveTracers
PassiveTracer, SF6Tracer, CH3ITracer, COAnthroEmis25dayTracer, COAnthroEmis50dayTracer, COUniformEmis25dayTracer, GlobEmis90dayTracer, NHEmis90dayTracer, SHEmis90dayTracer |
sfc | 500hPa | full column | stratosphere |
| WetLossConv
Pb210, Pb210Strat, Be7, Be7Strat, Be10, Be10Strat |
sfc | 500 hPa | full column | strat |
| WetLossLS
Pb210, Pb210Strat, Be7, Be7Strat, Be10, Be10Strat |
sfc | 500 hPa | full column | strat |
| Pb-Be Budgets | GEOS-FP 5.22.0 (Ref): | GEOS-FP 5.25.1 (Dev): | ||
| Operation budgets | ||||
| Strat-trop exchange | GEOS-FP 5.22 (Ref): | GEOS-FP 5.25 (Dev): | ||