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 2016/06/30 . 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: 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 plot Air Temperature Daily Mean 2m See list plot Air Temperature Monthly Mean 2m air.2m.mon.mean.nc plot Ice concentration 4-times Daily Values Surface See list plot Ice concentration Daily Mean Surface See list plot Ice concentration Monthly Mean Surface icec.sfc.mon.mean.nc plot Pressure 4-times Daily Values Surface See list plot Pressure Daily Mean Surface See list plot Pressure Monthly Mean Surface pres.sfc.mon.mean.nc plot Specific humidity 4-times Daily Values 2m See list plot Specific humidity Daily Mean 2m See list plot Specific humidity Monthly Mean 2m shum.2m.mon.mean.nc plot Maximum temperature 4-times Daily Values 2m See list plot Maximum temperature Daily Maximum 2m See list plot Maximum temperature Monthly Mean of Daily Maxima 2m tmax.2m.mon.mean.nc plot Minimum temperature 4-times Daily Values 2m See list plot Minimum temperature Daily Minimum 2m See list plot Minimum temperature Monthly Mean of Daily Minima 2m tmin.2m.mon.mean.nc plot Skin Temperature 4-times Daily Values Surface See list plot Skin Temperature Daily Mean Surface See list plot Skin Temperature Monthly Mean Surface skt.sfc.mon.mean.nc plot Soil moisture (0-10cm) Daily Mean 0-10cm See list plot Soil moisture (0-10cm) Daily Mean 0-10cm See list plot Soil moisture (0-10cm) Monthly Mean 0-10cm soilw.0-10cm.mon.mean.nc plot Soil moisture (10-200cm) 4-times Daily Values 10-200cm See list plot Soil moisture (10-200cm) Daily Mean 10-200cm See list plot Soil moisture (10-200cm) Monthly Mean 10-200cm soilw.10-200cm plot Temperature of 0-10cm layer 4-times Daily Values 0-10cm See list plot Temperature of 0-10cm layer Daily Mean 0-10cm See list plot Temperature of 0-10cm layer Monthly Mean 0-10cm tmp.0-10cm.mon.mean.nc plot Temperature of 10-200cm layer 4-times Daily Values 10-200cm See list plot Temperature of 10-200cm layer Daily Mean 10-200cm See list plot Temperature of 10-200cm layer Monthly Mean 10-200cm tmp.10-200cm.mon.mean.nc plot U-wind 4-times Daily Values 10m See list plot U-wind Daily Mean 10m See list plot U-wind Monthly Mean 10m uwnd.10m.mon.mean.nc plot V-wind 4-times Daily Values 10m See list plot V-wind Daily Mean 10m See list plot V-wind Monthly Mean 10m vwnd.10m.mon.mean.nc plot Water equiv. of snow depth 4-times Daily Values Surface See list plot Water equiv. of snow depth Daily Mean Surface See list plot Water equiv. of snow depth Monthly Mean Surface weasd.sfc.mon.mean.nc plot 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 plot Water Runoff Daily Accumulation Surface See list plot Water Runoff Monthly Mean Surface runof.sfc.mon.mean.nc plot 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 plot Convective precipitation rate Daily Mean Surface See list plot Convective precipitation rate Monthly Mean Surface cprat.sfc.mon.mean.nc plot Downward longwave radiation flux 4-times Daily Values Surface See list plot Downward longwave radiation flux Daily Mean Surface See list plot Downward longwave radiation flux Monthly Mean Surface dlwrf.sfc.mon.mean.nc plot Downward solar radiation flux 4-times Daily Values Surface See list plot Downward solar radiation flux Daily Mean Surface See list plot Downward solar radiation flux Monthly Mean Surface dswrf.sfc.mon.mean.nc plot Downward solar radiation flux 4-times Daily Values NTAT See list plot Downward solar radiation flux Daily Mean NTAT See list plot Downward solar radiation flux Monthly Mean NTAT dswrf.ntat.mon.mean.nc plot Ground heat flux 4-times Daily Values Surface See list plot Ground heat flux Daily Mean Surface See list plot Ground heat flux Monthly Mean Surface gflux.sfc.mon.mean.nc plot Latent heat net flux 4-times Daily Values Surface See list plot Latent heat net flux Daily Mean Surface See list plot Latent heat net flux Monthly Mean Surface lhtfl.sfc.mon.mean.nc plot Potential evaporation rate 4-times Daily Values Surface See list plot Potential evaporation rate Daily Mean Surface See list plot Potential evaporation rate Monthly Mean Surface pevpr.sfc.mon.mean.nc plot Precipitation rate 4-times Daily Values Surface See list plot Precipitation rate Daily Mean Surface See list plot Precipitation rate Monthly Mean Surface prate.sfc.mon.mean.nc plot Pressure at high cloud bottom 4-times Daily Values High Cloud Bottom See list plot Pressure at high cloud bottom Daily Mean High Cloud Bottom See list plot Pressure at high cloud bottom Monthly Mean High Cloud Bottom pres.hcb.mon.mean.nc plot Pressure at high cloud top 4-times Daily Values High Cloud Top See list plot Pressure at high cloud top Daily Mean High Cloud Top See list plot Pressure at high cloud top Monthly Mean High Cloud Top pres.hct.mon.mean.nc plot Pressure at low cloud bottom 4-times Daily Values Low Cloud Bottom See list plot Pressure at low cloud bottom Daily Mean Low Cloud Bottom See list plot Pressure at low cloud bottom Monthly Mean Low Cloud Bottom pres.lcb.mon.mean.nc plot Pressure at low cloud top 4-times Daily Values low cloud top See list plot Pressure at low cloud top Daily Mean low cloud top See list plot Pressure at low cloud top Monthly Mean low cloud top pres.lct.mon.mean.nc plot Pressure at middle cloud bottom 4-times Daily Values middle cloud bottom See list plot Pressure at middle cloud bottom Daily Mean middle cloud bottom See list plot Pressure at middle cloud bottom Monthly Mean middle cloud bottom pres.mcb.mon.mean.nc plot Pressure at middle cloud top 4-times Daily Values middle cloud top See list plot Pressure at middle cloud top Daily Mean middle cloud top See list plot Pressure at middle cloud top Monthly Mean middle cloud top pres.mct.mon.mean.nc plot Sensible heat net flux 4-times Daily Values Surface See list plot Sensible heat net flux Daily Mean Surface See list plot Sensible heat net flux Monthly Mean Surface shtfl.sfc.mon.mean.nc plot Total cloud cover 4-times Daily Values Surface See list plot Total cloud cover Daily Mean Surface See list plot Total cloud cover Monthly Mean Surface tcdc.eatm.mon.mean.nc plot Momentum flux (zonal) 4-times Daily Values Surface See list plot Momentum flux (zonal) Daily Mean Surface See list plot Momentum flux (zonal) Monthly Mean Surface uflx.sfc.mon.mean.nc plot Zonal gravity wave stress 4-times Daily Values Surface See list plot Zonal gravity wave stress Daily Mean Surface See list plot Zonal gravity wave stress Monthly Mean Surface ugwd.sfc.mon.mean.nc plot Upward longwave radiation flux 4-times Daily Values Surface See list plot Upward longwave radiation flux Daily Mean Surface See list plot Upward longwave radiation flux Monthly Mean Surface ulwrf.sfc.mon.mean.nc plot Upward longwave radiation flux 4-times Daily Values NTAT See list plot Upward longwave radiation flux Daily Mean NTAT See list plot Upward longwave radiation flux Monthly Mean NTAT ulwrf.ntat.mon.mean.nc plot Upward solar radiation flux 4-times Daily Values Surface See list plot Upward solar radiation flux Daily Mean Surface See list plot Upward solar radiation flux Monthly Mean Surface uswrf.sfc.mon.mean.nc plot Upward solar radiation flux 4-times Daily Values NTAT See list plot Upward solar radiation flux Daily Mean NTAT See list plot Upward solar radiation flux Monthly Mean NTAT uswrf.ntat.mon.mean.nc plot Momentum flux (meridional) 4-times Daily Values Surface See list plot Momentum flux (meridional) Daily Mean Surface See list plot Momentum flux (meridional) Monthly Mean Surface vflx.sfc.mon.mean.nc plot Meridional gravity wave stress 4-times Daily Values Surface See list plot Meridional gravity wave stress Daily Mean Surface See list plot Meridional gravity wave stress Monthly Mean Surface vgwd.sfc.mon.mean.nc plot Land-sea mask time invariant Surface See list plot 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 Missing Data: * None. 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 http://psl.noaa.gov/ 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/reanl 2-1.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 U.S. Department of Commerce | National Oceanic and Atmospheric Administration Earth System Research Laboratories | Physical Sciences Laboratory http://psl.noaa.gov/data/gridded/data.ncep.reanalysis2.gaussia n.html