Restrictions | Details | Caveats | File Naming | Citation | References | Original Source | Contact
NCEP-DOE Reanalysis 2: Gaussian Grid
Other Grid Types: NCEP Reanalysis2 Main Page | Pressure Level Data | Surface Data | Gaussian Grid Data | Spectral Coefficents Data
Brief Description:
- NCEP-DOE Reanalysis 2 is an improved version of the NCEP Reanalysis I model that fixed errors and updated paramterizations of of physical processes
Temporal Coverage:
- 4-times and monthly values for 1979/01/01 to 2021/03/31 .
Spatial Coverage:
- Global T62 Gaussian grid (192x94).
- 88.542N-88.542S, 0E-358.125E
Levels:
- Surface or near the surface, nominal top of atmosphere(NTAT), entire atmosphere as a column, cloud pressure levels
Update Schedule:
- Updated adding the previous year's data occur during the first quarter of the next.
Download/Plot Data: (Download Issues)
These variables are forecasts valid 6 hours after the reference time.
Variable | Statistic | Level | Download File | Create Plot/Subset |
---|---|---|---|---|
Air Temperature | 4-times Daily Values | 2m | See list | ![]() |
Air Temperature | Daily Mean | 2m | See list | ![]() |
Air Temperature | Monthly Mean | 2m | air.2m.mon.mean.nc | ![]() |
Ice concentration | 4-times Daily Values | Surface | See list | ![]() |
Ice concentration | Daily Mean | Surface | See list | ![]() |
Ice concentration | Monthly Mean | Surface | icec.sfc.mon.mean.nc | ![]() |
Pressure | 4-times Daily Values | Surface | See list | ![]() |
Pressure | Daily Mean | Surface | See list | ![]() |
Pressure | Monthly Mean | Surface | pres.sfc.mon.mean.nc | ![]() |
Specific humidity | 4-times Daily Values | 2m | See list | ![]() |
Specific humidity | Daily Mean | 2m | See list | ![]() |
Specific humidity | Monthly Mean | 2m | shum.2m.mon.mean.nc | ![]() |
Maximum temperature | 4-times Daily Values | 2m | See list | ![]() |
Maximum temperature | Daily Maximum | 2m | See list | ![]() |
Maximum temperature | Monthly Mean of Daily Maxima | 2m | tmax.2m.mon.mean.nc | ![]() |
Minimum temperature | 4-times Daily Values | 2m | See list | ![]() |
Minimum temperature | Daily Minimum | 2m | See list | ![]() |
Minimum temperature | Monthly Mean of Daily Minima | 2m | tmin.2m.mon.mean.nc | ![]() |
Skin Temperature | 4-times Daily Values | Surface | See list | ![]() |
Skin Temperature | Daily Mean | Surface | See list | ![]() |
Skin Temperature | Monthly Mean | Surface | skt.sfc.mon.mean.nc | ![]() |
Soil moisture (0-10cm) | Daily Mean | 0-10cm | See list | ![]() |
Soil moisture (0-10cm) | Daily Mean | 0-10cm | See list | ![]() |
Soil moisture (0-10cm) | Monthly Mean | 0-10cm | soilw.0-10cm.mon.mean.nc | ![]() |
Soil moisture (10-200cm) | 4-times Daily Values | 10-200cm | See list | ![]() |
Soil moisture (10-200cm) | Daily Mean | 10-200cm | See list | ![]() |
Soil moisture (10-200cm) | Monthly Mean | 10-200cm | soilw.10-200cm | ![]() |
Temperature of 0-10cm layer | 4-times Daily Values | 0-10cm | See list | ![]() |
Temperature of 0-10cm layer | Daily Mean | 0-10cm | See list | ![]() |
Temperature of 0-10cm layer | Monthly Mean | 0-10cm | tmp.0-10cm.mon.mean.nc | ![]() |
Temperature of 10-200cm layer | 4-times Daily Values | 10-200cm | See list | ![]() |
Temperature of 10-200cm layer | Daily Mean | 10-200cm | See list | ![]() |
Temperature of 10-200cm layer | Monthly Mean | 10-200cm | tmp.10-200cm.mon.mean.nc | ![]() |
U-wind | 4-times Daily Values | 10m | See list | ![]() |
U-wind | Daily Mean | 10m | See list | ![]() |
U-wind | Monthly Mean | 10m | uwnd.10m.mon.mean.nc | ![]() |
V-wind | 4-times Daily Values | 10m | See list | ![]() |
V-wind | Daily Mean | 10m | See list | ![]() |
V-wind | Monthly Mean | 10m | vwnd.10m.mon.mean.nc | ![]() |
Water equiv. of snow depth | 4-times Daily Values | Surface | See list | ![]() |
Water equiv. of snow depth | Daily Mean | Surface | See list | ![]() |
Water equiv. of snow depth | Monthly Mean | Surface | weasd.sfc.mon.mean.nc | ![]() |
These variables are accumulations, but the monthly mean averages dailies.
Variable | Statistic | Level | Download File | Create Plot/Subset |
---|---|---|---|---|
Water Runoff | 6-hour Accumulation | Surface | See list | ![]() |
Water Runoff | Daily Accumulation | Surface | See list | ![]() |
Water Runoff | Monthly Mean | Surface | runof.sfc.mon.mean.nc | ![]() |
These variables are 6 hour averages starting at the reference time.
Variable | Statistic | Level | Download File | Create Plot/Subset |
---|---|---|---|---|
Convective precipitation rate | 4-times Daily Values | Surface | See list | ![]() |
Convective precipitation rate | Daily Mean | Surface | See list | ![]() |
Convective precipitation rate | Monthly Mean | Surface | cprat.sfc.mon.mean.nc | ![]() |
Downward longwave radiation flux | 4-times Daily Values | Surface | See list | ![]() |
Downward longwave radiation flux | Daily Mean | Surface | See list | ![]() |
Downward longwave radiation flux | Monthly Mean | Surface | dlwrf.sfc.mon.mean.nc | ![]() |
Downward solar radiation flux | 4-times Daily Values | Surface | See list | ![]() |
Downward solar radiation flux | Daily Mean | Surface | See list | ![]() |
Downward solar radiation flux | Monthly Mean | Surface | dswrf.sfc.mon.mean.nc | ![]() |
Downward solar radiation flux | 4-times Daily Values | NTAT | See list | ![]() |
Downward solar radiation flux | Daily Mean | NTAT | See list | ![]() |
Downward solar radiation flux | Monthly Mean | NTAT | dswrf.ntat.mon.mean.nc | ![]() |
Ground heat flux | 4-times Daily Values | Surface | See list | ![]() |
Ground heat flux | Daily Mean | Surface | See list | ![]() |
Ground heat flux | Monthly Mean | Surface | gflux.sfc.mon.mean.nc | ![]() |
Latent heat net flux | 4-times Daily Values | Surface | See list | ![]() |
Latent heat net flux | Daily Mean | Surface | See list | ![]() |
Latent heat net flux | Monthly Mean | Surface | lhtfl.sfc.mon.mean.nc | ![]() |
Potential evaporation rate | 4-times Daily Values | Surface | See list | ![]() |
Potential evaporation rate | Daily Mean | Surface | See list | ![]() |
Potential evaporation rate | Monthly Mean | Surface | pevpr.sfc.mon.mean.nc | ![]() |
Precipitation rate | 4-times Daily Values | Surface | See list | ![]() |
Precipitation rate | Daily Mean | Surface | See list | ![]() |
Precipitation rate | Monthly Mean | Surface | prate.sfc.mon.mean.nc | ![]() |
Pressure at high cloud bottom | 4-times Daily Values | High Cloud Bottom | See list | ![]() |
Pressure at high cloud bottom | Daily Mean | High Cloud Bottom | See list | ![]() |
Pressure at high cloud bottom | Monthly Mean | High Cloud Bottom | pres.hcb.mon.mean.nc | ![]() |
Pressure at high cloud top | 4-times Daily Values | High Cloud Top | See list | ![]() |
Pressure at high cloud top | Daily Mean | High Cloud Top | See list | ![]() |
Pressure at high cloud top | Monthly Mean | High Cloud Top | pres.hct.mon.mean.nc | ![]() |
Pressure at low cloud bottom | 4-times Daily Values | Low Cloud Bottom | See list | ![]() |
Pressure at low cloud bottom | Daily Mean | Low Cloud Bottom | See list | ![]() |
Pressure at low cloud bottom | Monthly Mean | Low Cloud Bottom | pres.lcb.mon.mean.nc | ![]() |
Pressure at low cloud top | 4-times Daily Values | low cloud top | See list | ![]() |
Pressure at low cloud top | Daily Mean | low cloud top | See list | ![]() |
Pressure at low cloud top | Monthly Mean | low cloud top | pres.lct.mon.mean.nc | ![]() |
Pressure at middle cloud bottom | 4-times Daily Values | middle cloud bottom | See list | ![]() |
Pressure at middle cloud bottom | Daily Mean | middle cloud bottom | See list | ![]() |
Pressure at middle cloud bottom | Monthly Mean | middle cloud bottom | pres.mcb.mon.mean.nc | ![]() |
Pressure at middle cloud top | 4-times Daily Values | middle cloud top | See list | ![]() |
Pressure at middle cloud top | Daily Mean | middle cloud top | See list | ![]() |
Pressure at middle cloud top | Monthly Mean | middle cloud top | pres.mct.mon.mean.nc | ![]() |
Sensible heat net flux | 4-times Daily Values | Surface | See list | ![]() |
Sensible heat net flux | Daily Mean | Surface | See list | ![]() |
Sensible heat net flux | Monthly Mean | Surface | shtfl.sfc.mon.mean.nc | ![]() |
Total cloud cover | 4-times Daily Values | Surface | See list | ![]() |
Total cloud cover | Daily Mean | Surface | See list | ![]() |
Total cloud cover | Monthly Mean | Surface | tcdc.eatm.mon.mean.nc | ![]() |
Momentum flux (zonal) | 4-times Daily Values | Surface | See list | ![]() |
Momentum flux (zonal) | Daily Mean | Surface | See list | ![]() |
Momentum flux (zonal) | Monthly Mean | Surface | uflx.sfc.mon.mean.nc | ![]() |
Zonal gravity wave stress | 4-times Daily Values | Surface | See list | ![]() |
Zonal gravity wave stress | Daily Mean | Surface | See list | ![]() |
Zonal gravity wave stress | Monthly Mean | Surface | ugwd.sfc.mon.mean.nc | ![]() |
Upward longwave radiation flux | 4-times Daily Values | Surface | See list | ![]() |
Upward longwave radiation flux | Daily Mean | Surface | See list | ![]() |
Upward longwave radiation flux | Monthly Mean | Surface | ulwrf.sfc.mon.mean.nc | ![]() |
Upward longwave radiation flux | 4-times Daily Values | NTAT | See list | ![]() |
Upward longwave radiation flux | Daily Mean | NTAT | See list | ![]() |
Upward longwave radiation flux | Monthly Mean | NTAT | ulwrf.ntat.mon.mean.nc | ![]() |
Upward solar radiation flux | 4-times Daily Values | Surface | See list | ![]() |
Upward solar radiation flux | Daily Mean | Surface | See list | ![]() |
Upward solar radiation flux | Monthly Mean | Surface | uswrf.sfc.mon.mean.nc | ![]() |
Upward solar radiation flux | 4-times Daily Values | NTAT | See list | ![]() |
Upward solar radiation flux | Daily Mean | NTAT | See list | ![]() |
Upward solar radiation flux | Monthly Mean | NTAT | uswrf.ntat.mon.mean.nc | ![]() |
Momentum flux (meridional) | 4-times Daily Values | Surface | See list | ![]() |
Momentum flux (meridional) | Daily Mean | Surface | See list | ![]() |
Momentum flux (meridional) | Monthly Mean | Surface | vflx.sfc.mon.mean.nc | ![]() |
Meridional gravity wave stress | 4-times Daily Values | Surface | See list | ![]() |
Meridional gravity wave stress | Daily Mean | Surface | See list | ![]() |
Meridional gravity wave stress | Monthly Mean | Surface | vgwd.sfc.mon.mean.nc | ![]() |
Land-sea mask | time invariant | Surface | land.sfc.gauss.nc | ![]() |
Surface height (orography) | time invariant | Surface | hgt.sfc.gauss.nc | ![]() |
Usage Restrictions:
- None
Detailed Description:
- The NCEP-DOE Reanalysis 2 project is using a state-of-the-art analysis/forecast system to perform data assimilation using past data from 1979 through the previous year. A large subset of this data is available from PSL in its original 4 times daily format and as daily averages.
- A discussion of the sign convention for radiative fluxis is available.
Caveats:
Bad MSLP data in 2004 NetCDF files: The MSLP data in the NetCDF files representing 2004 values that were added to our archives in early April, 2004, were done incorrectly. The source data from NCEP were fine; it was a processing error here. This was corrected late on 2005/06/23. If you have downloaded 2004 MSLP data from us at any of the three temporal frequencies, you are strongly urged to reacquire the data.
Bad skin temperatures in 1982.The skin temperature (variable name skt) for 1982 had bad data. These data were updated late on 2003/05/14 based on new GRIB file from NCEP. All three temporal frequencies were affected and thus updated.
-
* = no year in file name
Note:
 § The skt.sfc files contain skin temperature as described in the March, 1996 BAMS article. As such, over land and sea ice, the temperature is a prognostic variable. Over open water, the skin temperature is fixed at its initial value; i.e., the Reynolds SST as seen by the model. The Reynolds' SST analyses were done weekly and the reconstructed SST done monthly. The analyses were linearly interpolated to daily values which were used for all four analyses.
The following variables are six hour forecast values valid six hours after the reference time: skt.sfc, air.2m, icec.sfc, pres.sfc, runof.sfc, shum.2m, tmax.2m, tmin.2m, tmp.300cm, uwnd.10m, vwnd.10m, weasd.sfc
The following variables are six hour averages for the period of the reference time plus six hours: cprat.sfc, dlwrf.sfc, dswrf.sfc, dswrf.ntat, gflux.sfc, lhtfl.sfc, pevpr.sfc, prate.sfc, pres.{hcb,hct,lcb,lct,mcb,mct}, shtfl.sfc, soilw.0-10cm, soilw.10-200cm, tcdc.eatm, tmp.0-10cm, tmp.10-200cm, uflx.sfc, ugwd.sfc, ulwrf.sfc, ulwrf.ntat, uswrf.sfc, uswrf.ntat, vflx.sfc, vgwd.sfc
And, of course, land.sfc is time-invariant.
Related File Naming & Structure Information:
File Names:
- var.time.stat.nc (In directory: /Datasets/udel.airt.precip/) Archive parameters: File names are composed of variable abbreviations, level, and year: (variable).(level).gauss.(year).nc
These variables (air.2m - weasd) are forecasts valid 6 hours after the reference time.
Dataset Format and Size:
- PSL standard NetCDF 311 Mbyte file for each monthly file (packed).
- PSL standard NetCDF 30 Mbyte file for each long term mean file (packed).
- By anonymous FTP:
- 4x daily data are available from ftp.cdc.noaa.gov in /Datasets/ncep.reanalysis2/gaussian_grid/.
- The 4x data files are quite large, so you may only be able to download them if you have a fast network connection.
- Daily averages are available from ftp.cdc.noaa.gov in /Datasets/ncep.reanalysis2.dailyavgs/gaussian_grid/.
- The data are divided by variable and year into separate files
- There are 1,796files currently
- Files are 5 to 52 Mbytes per variable per year
- Current total of 45 Gbytes for 4xDaily and 11 Gbytes for daily averages
- None.
Missing Data:
Citation:
- Please note: If you acquire NCEP/DOE 2 Reanalysis data products from PSL, we ask that you acknowledge us in your use of the data. This may be done by including text such as NCEP/DOE 2 Reanalysis data provided by the NOAA/OAR/ESRL PSL, Boulder, Colorado, USA, from their Web site at / in any documents or publications using these data. We would also appreciate receiving a copy of the relevant publications. This will help PSL to justify keeping the NCEP/DOE 2 Reanalysis data set freely available online in the future. Thank you!
References:
- http://www.cpc.ncep.noaa.gov/products/wesley/reanalysis2/kana/reanl2-1.htm"
- NCEP-DOE AMIP-II Reanalysis (R-2): M. Kanamitsu, W. Ebisuzaki, J. Woollen, S-K Yang, J.J. Hnilo, M. Fiorino, and G. L. Potter. 1631-1643, Nov 2002, Bulletin of the American Meterological Society.
Original Source:
- NOAA National Centers for Environmental Predictions
Contact:
-
Physical Sciences Laboratory: Data Management
NOAA/ESRL/PSL
325 Broadway
Boulder, CO 80305-3328
psl.data@noaa.gov
- Climate Datasets: By Category
- All
- Sub-daily
- Daily
- Monthly
- Surface
- Temperature
- SST
- Precipitation
- Land
- Ocean
- Multi-level
- Radiation
- Arctic
- Reanalysis
- Climate Indices
- Search Datasets
- 20th Century Reanalysis
- Popular Datasets
- ICOADS
- NCEP/NCAR Reanalysis
- N. American Regional Reanalysis
- Plotting & Analysis
- Basic Plots
- Analysis Tools
- Access
- FTP Access
- OPeNDAP Access
- Software Resources
- Complete Data Resources
- About NetCDF
- Reading Data in NetCDF Format