List of GEOS-FP met fields
From Geos-chem
GEOS-FP (formerly named GEOS-5.7.2) is the latest update of the GEOS-5 met data product. It has finer native horizontal resolution (0.25° lat x 0.3125° lon) and temporal resolution (hourly data and 3-hourly data) than older GMAO met products such as GEOS-5, the MERRA reanalysis, and GEOS-4.
NOTE: GEOS-Chem only uses a subset of the entire GEOS-FP data archive. On this page we list the GEOS-FP met fields that archive for use with GEOS-Chem.
For more information, please see:
- GEOS5-FP file specification document, Version 1.0 (11 Jun 2013)
- GEOS-FP page on the GEOS-Chem wiki
- GEOS-5.7.2 page on the GEOS-Chem wiki
- MERRA page on the GEOS-Chem wiki
- GEOS-5.2.0 page on the GEOS-Chem wiki
- Overview of GMAO met data products
Contents
Constant fields
- These data will be timestamped 2011/01/01 at 00:00 GMT for convenience.
- These are time-invariant constant fields, which will have the following filenames:
- GEOS572.20110101.CN.025x03125.CH.nc (Native resolution nested CH grid)
- GEOS572.20110101.CN.025x03125.NA.nc (Native resolution nested NA grid)
- GEOS572.20110101.CN.2x25.nc (2° x 2.5° global grid)
- GEOS572.20110101.CN.4x5.nc (4° x 5° global grid)
- NOTE: At present (Aug 2013), the file names still reflect the older GEOS572 nomenclature. We will correct this at a future date.
- The File Collection is a tag that indicates in which files a particular data field can be found. A GEOS-FP data file is created for each new date and time. Therefore, a day's worth of hourly data will be spread over 24 individual files and a day's worth of 3-hourly data will be spread over 8 individual files.
| Field | Units | File collection | Description | Notes | Where used in GEOS-Chem? |
|---|---|---|---|---|---|
| FRLAKE | 1 | const_2d_asm_Nx | Fraction of lake type in grid box | CH4 simulation, diagnostics | |
| FRLAND | 1 | const_2d_asm_Nx | Fraction of land type in grid box | simulation, PBL mixing, chemistry, Hg simulation, CH4 simulation | |
| FRLANDIC | 1 | const_2d_asm_Nx | Fraction of land ice type in grid box | Hg simulation, CH4 simulation, PBL mixing | |
| FROCEAN | 1 | const_2d_asm_Nx | Fraction of ocean in grid box | chemistry, Hg simulation, CH4 simulation, emissions | |
| PHIS | m2 s-2 | const_2d_asm_Nx | Surface geopotential | kept for diagnostics |
--Bob Y. 15:57, 15 August 2013 (EDT)
A1 fields
- These are 1-hr time-averaged fields, which will have the following filenames:
- GEOS572.YYYYMMDD.A1.025x03125.SEA4CRS.nc (Native resolution nested China grid)
- GEOS572.YYYYMMDD.A1.2x25.nc (2° x 2.5° global grid)
- GEOS572.YYYYMMDD.A1.4x5.nc (4° x 5° global grid)
- All A1 fields are 2-dimensional (lon,lat)
- Timestamps (i.e. center of averaging period): 00:30, 01:30, 02:30 ... 23:30 GMT
- The File Collection is a tag that indicates in which files a particular data field can be found. A GEOS-5.7.2 "raw" data file is created for each new date and time. Therefore, a day's worth of hourly data will be spread over 24 individual files and a day's worth of 3-hourly data will be spread over 8 individual files.
- The MERRA Field and MERRA Units refer to the equivalent data fields (and units) in the MERRA data archive for GEOS-Chem. If a field is missing it does not necessarily mean that it was not produced in MERRA; it just means that we did not regrid it for use with GEOS-Chem.
| GEOS-5.7.2 Field |
GEOS-5.7.2 Units |
Description | File Collection | Notes | MERRA Field |
MERRA Units |
|---|---|---|---|---|---|---|
| ALBEDO | fraction | Surface albedo | tavg1_2d_rad_Nx | ALBEDO | fraction | |
| CLDTOT | fraction | Total cloud fraction | tavg1_2d_rad_Nx | CLDTOT | fraction | |
| EFLUX | W m-2 | Latent heat flux (positive upward) | tavg1_2d_flx_Nx | EFLUX | W m-2 | |
| EVAP | kg m-2 s-2 | Surface evaporation | tavg1_2d_flx_Nx | EVAP | kg m-2 s-2 | |
| FRSEAICE | fraction | Fraction of sea ice | tavg1_2d_flx_Nx tavg1_2d_ocn_Nx |
Used to create the binned SEAICE** fields listed below | FRSEAICE | fraction |
| FRSNO | fraction | Fractional snow-covered area | tavg1_2d_lnd_Nx | FRSNO | fraction | |
| GRN | fraction | Vegetation greenness fraction | tavg1_2d_lnd_Nx | GRN | fraction | |
| GWETROOT | fraction | Root zone soil wetness | tavg1_2d_lnd_Nx | GWETROOT | fraction | |
| GWETTOP | fraction | Top soil wetness | tavg1_2d_lnd_Nx | GWETTOP | fraction | |
| HFLUX | W m-2 | Sensible heat flux (positive upward) | tavg1_2d_flx_Nx | HFLUX | W m-2 | |
| LAI | m2 m-2 | Leaf area index | tavg1_2d_lnd_Nx | LAI | fraction | |
| LWGNT | W m-2 | Surface net downward longwave flux | tavg1_2d_rad_Nx | LWGNT | W m-2 | |
| LWI | unitless | Land/water/ice flags | inst3_3d_aer_Nv | Needed for backwards compatibility; can also be derived | LWI | unitless |
| LWTUP | W m-2 | Upward longwave flux at top of atmosphere (TOA) | tavg1_2d_rad_Nx | LWTUP | W m-2 | |
| PARDF | W m-2 | Surface downward PAR diffuse flux | tavg1_2d_lnd_Nx | PARDF | W m-2 | |
| PARDR | W m-2 | Surface downward PAR beam flux | tavg1_2d_lnd_Nx | PARDR | W m-2 | |
| PBLH | m | Planetary boundary layer height above surface | tavg1_2d_flx_Nx | PBLH | m | |
| PRECANV | kg m-2 s-2 | Surface precipitation flux from anvils | tavg1_2d_flx_Nx | PRECANV | kg m-2 s-2 | |
| PRECCON | kg m-2 s-2 | Surface precipitation flux from convection | tavg1_2d_flx_Nx | PRECCON | kg m-2 s-2 | |
| PRECLSC | kg m-2 s-2 | Surface precipitation flux from large-scale | tavg1_2d_flx_Nx | PRECLSC | kg m-2 s-2 | |
| PRECSNO | kg m-2 s-2 | Surface snowfall flux | tavg1_2d_flx_Nx tavg1_2d_lnd_Nx |
PRECSNO | kg m-2 s-2 | |
| PRECTOT | kg m-2 s-2 | Total surface precipitation flux | tavg1_2d_flx_Nx tavg1_2d_lnd_Nx |
PRECTOT | kg m-2 s-2 | |
| QV2M | kg kg-1 | Specific humidity at 2 m above the displacement height | tavg1_2d_slv_Nx | QV2M | kg kg-1 | |
| SLP | Pa | Sea level pressure | tavg1_2d_slv_Nx | Convert to hPa for GEOS-Chem | SLP | Pa |
| SNODP | m | Snow depth | tavg1_2d_lnd_Nx | SNODP | m | |
| SNOMAS | kg m-2 | Snow mass | tavg1_2d_lnd_Nx | SNOMAS | mm H2O | |
| SWGDN | W m-2 | Surface incident shortwave flux | tavg1_2d_rad_Nx | SWGDN | W m-2 | |
| SWGNT | W m-2 | Net surface downward shortwave flux | tavg1_2d_rad_Nx | SWGNT | W m-2 | |
| TROPPT | Pa | T based tropopause pressure | tavg1_2d_slv_Nx | Convert to hPa for GEOS-Chem | TROPPT | Pa |
| TS | K | Surface skin temperature | tavg1_2d_slv_Nx | TS | K | |
| T2M | K | Temperature 2 m above displacement height | tavg1_2d_slv_Nx | Used as a proxy for surface air temperature in GEOS-5 | T2M | K |
| U10M | m s-1 | Eastward wind 10 m above displacement height | tavg1_2d_slv_Nx tavg1_2d_ocn_Nx |
U10M | m s-1 | |
| USTAR | m s-1 | Friction velocity | tavg1_2d_flx_Nx | USTAR | m s-1 | |
| V10M | m s-1 | Northward wind 10 m above displacement height | tavg1_2d_slv_Nx tavg1_2d_ocn_Nx |
V10M | m s-1 | |
| Z0M | m | Roughness length, momentum | tavg1_2d_flx_Nx | Z0M | m | |
| Derived fields | ||||||
| SEAICE00 | fraction | Fraction of grid box that has < 10% sea ice coverage | - | Created by separating FRSEAICE into bins | - | - |
| SEAICE10 | fraction | Fraction of grid box that has 10-20% sea ice coverage | - | Created by separating FRSEAICE into bins | - | - |
| SEAICE20 | fraction | Fraction of grid box that has 20-30% sea ice coverage | - | Created by separating FRSEAICE into bins | - | - |
| SEAICE30 | fraction | Fraction of grid box that has 30-40% sea ice coverage | - | Created by separating FRSEAICE into bins | - | - |
| SEAICE40 | fraction | Fraction of grid box that has 40-50% sea ice coverage | - | Created by separating FRSEAICE into bins | - | - |
| SEAICE50 | fraction | Fraction of grid box that has 50-60% sea ice coverage | - | Created by separating FRSEAICE into bins | - | - |
| SEAICE60 | fraction | Fraction of grid box that has 60-70% sea ice coverage | - | Created by separating FRSEAICE into bins | - | - |
| SEAICE70 | fraction | Fraction of grid box that has 70-80% sea ice coverage | - | Created by separating FRSEAICE into bins | - | - |
| SEAICE80 | fraction | Fraction of grid box that has 80-90% sea ice coverage | - | Created by separating FRSEAICE into bins | - | - |
| SEAICE90 | fraction | Fraction of grid box that has > 90% sea ice coverage | - | Created by separating FRSEAICE into bins | - | - |
--Bob Y. 16:00, 12 January 2012 (EST)
A3cld fields
- These are 3-hr time-averaged fields, which will have the following filenames:
- GEOS572.YYYYMMDD.A3cld.025x03125.SEA4CRS.nc (Native resolution, nested China grid)
- GEOS572.YYYYMMDD.A3cld.2x25.nc (2° x 2.5° global grid)
- GEOS572.YYYYMMDD.A3cld.4x5.nc (4° x 5° global grid)
- All A3 fields are 3-dimensional (lon,lat,alt). Data is placed at the vertical center of each grid box.
- Timestamps (i.e. center of averaging period): 01:30, 04:30, 07:30, 10:30, 13:30, 16:30, 19:30, 22:30 GMT
- The File Collection is a tag that indicates in which files a particular data field can be found. A GEOS-5.7.2 "raw" data file is created for each new date and time. Therefore, a day's worth of hourly data will be spread over 24 individual files and a day's worth of 3-hourly data will be spread over 8 individual files.
- The MERRA Field and MERRA Units refer to the equivalent data fields (and units) in the MERRA data archive for GEOS-Chem. If a field is missing it does not necessarily mean that it was not produced in MERRA; it just means that we did not regrid it for use with GEOS-Chem.
| GEOS-5.7.2 Field |
GEOS-5.7.2 Units |
Description | File collection | Notes | MERRA Field |
MERRA Units |
|---|---|---|---|---|---|---|
| CLOUD | fraction | Total cloud fraction in grid box | tavg3_3d_rad_Nv | Regrid with Hongyu Liu's algorithm | CFLS + CFAN + CFCU | fraction |
| QIAN | kg kg-1 | Cloud ice water mixing ratio - anvils | tavg3_3d_cld_Nv | Used to construct QI | - | - |
| QILS | kg kg-1 | Cloud ice water mixing ratio - large-scale | tavg3_3d_cld_Nv | Used to construct QI | - | - |
| QLAN | kg kg-1 | Cloud liquid water mixing ratio - anvils | tavg3_3d_cld_Nv | Used to construct QL | - | - |
| QLLS | kg kg-1 | Cloud liquid water mixing ratio - large-scale | tavg3_3d_cld_Nv | Used to construct QL | - | -
|
| TAUCLI | unitless | In-cloud ice cloud optical thickness (visible band) | tavg3_3d_cld_Nv | Regrid w/ Hongyu Liu's algorithm | TAUCLI | unitless |
| TAUCLW | unitless | In-cloud liquid cloud optical thickness (visible band) | tavg3_3d_cld_Nv | Regrid w/ Hongyu Liu's algorithm | TAUCLW | unitless |
| Derived fields | ||||||
| QI | kg kg-1 | Cloud ice water mixing ratio | tavg3_3d_cld_Nv | QI = QIAN + QILS | QI | kg kg-1 |
| QL | kg kg-1 | Cloud liquid water mixing ratio - anvils | tavg3_3d_cld_Nv | QL = QLAN + QLLS | QL | kg kg-1 |
| OPTDEPTH | unitless | Total in-cloud optical depth (visible band) | - | = TAUCLI + TAUCLW; Regrid w/ Hongyu Liu's algorithm |
OPTDEPTH | unitless |
| Fields we are considering adding | ||||||
| CFAN | fraction | 3D cloud fraction, anvils | tavg3_3d_cld_Nv | Regrid with Hongyu Liu's algorithm | CFAN | fraction |
| CFCU | fraction | 3D cloud fraction, convective | tavg3_3d_cld_Nv | Regrid with Hongyu Liu's algorithm | CFCU | fraction |
| CFLS | fraction | 3D cloud fraction, large-scale | tavg3_3d_cld_Nv | Regrid with Hongyu Liu's algorithm | CFLS | fraction |
| QCCU | fraction | Cloud condensate mixing ration, convective updraft | tavg3_3d_cld_Nv | Regrid with Hongyu Liu's algorithm | - | - |
--Bob Y. 11:32, 29 February 2012 (EST)
A3dyn fields
- These are 3-hr time-averaged fields, which will have the following filenames:
- GEOS572.YYYYMMDD.A3dyn.025x03125.SEA4CRS.nc (Native resolution, nested China grid)
- GEOS572.YYYYMMDD.A3dyn.2x25.nc (2° x 2.5° global grid)
- GEOS572.YYYYMMDD.A3dyn.4x5.nc (4° x 5° global grid)
- All A3 fields are 3-dimensional (lon,lat,alt). Data is placed at the vertical center of each grid box.
- Timestamps (i.e. center of averaging period): 01:30, 04:30, 07:30, 10:30, 13:30, 16:30, 19:30, 22:30 GMT
- The File Collection is a tag that indicates in which files a particular data field can be found. A GEOS-5.7.2. data file is created for each new date and time. Therefore, a day's worth of hourly data will be spread over 24 individual files and a day's worth of 3-hourly data will be spread over 8 individual files.
- The MERRA Field and MERRA Units refer to the equivalent data fields (and units) in the MERRA data archive for GEOS-Chem. If a field is missing it does not necessarily mean that it was not produced in MERRA; it just means that we did not regrid it for use with GEOS-Chem.
| GEOS-5.7.2 Field |
GEOS-5.7.2 Units |
Description | File collection | Notes | MERRA Field |
MERRA Units |
|---|---|---|---|---|---|---|
| CMFMC | kg m-2 s-2 | Upward moist convective mass flux | tavg3_3d_mst_Ne | CMFMC | kg m-2 s-2 | |
| DTRAIN | kg m-2 s-2 | Detrainment cloud mass flux | tavg3_3d_cld_Nv | DTRAIN | kg m-2 s-2 | |
| OMEGA | Pa s-1 | Vertical pressure velocity | tavg3_3d_udt_Nv | OMEGA | Pa s-1 | |
| RH | fraction | Relative humidity | tavg3_3d_cld_Nv | Was an I6 field in MERRA
RH is computed as follows:
|
RH | fraction |
| U | m s-1 | Eastward component of wind | tavg3_3d_udt_Nv | U | m s-1 | |
| V | m s-1 | Northward component of wind | tavg3_3d_udt_Nv | V | m s-1 |
--Bob Y. 15:42, 12 January 2012 (EST)
A3mstC fields
- These are 3-hr time-averaged fields, which will have the following filenames:
- GEOS572.YYYYMMDD.A3mstC.025x03125.SEA4CRS.nc (Native resolution, nested China grid)
- GEOS572.YYYYMMDD.A3mstC.2x25.nc (2° x 2.5° global grid)
- GEOS572.YYYYMMDD.A3mstC.4x5.nc (4° x 5° global grid)
- All A3 fields are 3-dimensional (lon,lat,alt). Data is placed at the vertical center of each grid box.
- Timestamps (i.e. center of averaging period): 01:30, 04:30, 07:30, 10:30, 13:30, 16:30, 19:30, 22:30 GMT
- The File Collection is a tag that indicates in which files a particular data field can be found. A GEOS-5.7.2. "raw" data file is created for each new date and time. Therefore, a day's worth of hourly data will be spread over 24 individual files and a day's worth of 3-hourly data will be spread over 8 individual files.
- The MERRA Field and MERRA Units refer to the equivalent data fields (and units) in the MERRA data archive for GEOS-Chem. If a field is missing it does not necessarily mean that it was not produced in MERRA; it just means that we did not regrid it for use with GEOS-Chem.
| GEOS-5.7.2 Field |
GEOS-5.7.2 Units |
Description | File collection | Notes | MERRA Field |
MERRA Units |
|---|---|---|---|---|---|---|
| DQRCU | kg kg-1 s-1 | Precipitation production rate – convective | tavg3_3d_mst_Nv | DQRCU | kg kg-1 s-1 | |
| DQRLSAN | kg kg-1 s-1 | Precipitation production rate - large-scale+anvil | tavg3_3d_mst_Nv | DQRLSAN | kg kg-1 s-1 | |
| REEVAPCN | kg kg-1 s-1 | Evaporation of precipitating convective condensate | tavg3_3d_mst_Nv | REEVAPCN | kg kg-1 s-1 | |
| REEVAPLS(AN) | kg kg-1 s-1 | Evaporation of precipitating LS & anvil condensate | tavg3_3d_mst_Nv | REEVAPLS(AN) | kg kg-1 s-1 |
--Bob Y. 13:55, 6 February 2012 (EST)
A3mstE fields
- These are 3-hr time-averaged fields, which will have the following filenames:
- GEOS572.YYYYMMDD.A3mstE.025x03125.SEA4CRS.nc (Native resolution, nested China grid)
- GEOS572.YYYYMMDD.A3mstE.2x25.nc (2° x 2.5° global grid)
- GEOS572.YYYYMMDD.A3mstE.4x5.nc (4° x 5° global grid)
- All A3 fields are 3-dimensional (lon,lat,alt). Data is placed on the edges of the grid boxes.
- Timestamps (i.e. center of averaging period): 01:30, 04:30, 07:30, 10:30, 13:30, 16:30, 19:30, 22:30 GMT
- The File Collection is a tag that indicates in which files a particular data field can be found. A GEOS-5.7.2 "raw" data file is created for each new date and time. Therefore, a day's worth of hourly data will be spread over 24 individual files and a day's worth of 3-hourly data will be spread over 8 individual files.
- The MERRA Field and MERRA Units refer to the equivalent data fields (and units) in the MERRA data archive for GEOS-Chem. If a field is missing it does not necessarily mean that it was not produced in MERRA; it just means that we did not regrid it for use with GEOS-Chem.
| GEOS-5.7.2 Field |
GEOS-5.7.2 Units |
Description | File collection | Notes | MERRA Field |
MERRA Units |
|---|---|---|---|---|---|---|
| PFICU | kg m-2 s-1 | Downward flux of ice precipitation – convective | tavg3_3d_mst_Ne | PFICU | kg m-2 s-1 | |
| PFILSAN | kg m-2 s-1 | Downward flux of ice precip - large-scale+anvil | tavg3_3d_mst_Ne | PFILSAN | kg m-2 s-1 | |
| PFLCU | kg m-2 s-1 | Downward flux of liquid precipitation – convective | tavg3_3d_mst_Ne | PFLCU | kg m-2 s-1 | |
| PFLLSAN | kg m-2 s-1 | Downward flux of liquid precip - large-scale + anvil | tavg3_3d_mst_Ne | PFLLSAN | kg m-2 s-1 |
--Bob Y. 15:54, 12 January 2012 (EST)
I3 fields
NOTES:
- These are 3-hr instantaneous fields, which will have the following filenames:
- GEOS572.YYYYMMDD.I3.025x03125.SEA4CRS.nc (Native resolution, nested China grid)
- GEOS572.YYYYMMDD.I3.2x25.nc (2° x 2.5° global grid)
- GEOS572.YYYYMMDD.I3.4x5.nc (4° x 5° global grid)
- I3 fields are either 2-dimensional (lon,lat) or 3D (lon,lat,alt). 3D data is placed at the vertical centers of the grid box.
- Timestamps: Instantaneous values at 00:00, 03:00, 06:00, 09:00, 12:00, 15:00, 18:00, 21:00 GMT
- The File Collection is a tag that indicates in which files a particular data field can be found. A GEOS-FP "raw" data file is created for each new date and time. Therefore, a day's worth of hourly data will be spread over 24 individual files and a day's worth of 3-hourly data will be spread over 8 individual files.
| GEOS-5.7.2 Field |
GEOS-5.7.2 Units |
Description | File Collections | Notes | MERRA Field |
MERRA Units |
|---|---|---|---|---|---|---|
| PS | Pa | Surface pressure | inst3_3d_asm_Nv | Convert to hPa for GEOS-Chem | PS | Pa |
| PV | K m2 kg-1 s-1 | Ertel potential vorticity | inst3_3d_asm_Nv | GMAO calls this field "EPV"; GEOS-Chem uses "PV" for backwards compatibility | PV | K m2 kg-1 s-1 |
| QV | kg kg-1 | Specific humidity | inst3_3d_asm_Nv | This was an A3 field in MERRA | QV | kg kg-1 |
| T | K | Air temperature | inst3_3d_asm_Nv | This was an A3 field in MERRA | T | K |
--Bob Y. 15:55, 12 January 2012 (EST)
