On this page: Temporal Coverage | Spatial Coverage | Levels | Update Schedule | Download/Plot Data | Analysis Tools
Restrictions | Details | Caveats | File Naming | Citation | References | Original Source | Contact

Twentieth Century Reanalysis (V2c): Monthly Mean Single Level (Analyses and Forecasts)

[ Data Type: Pressure Level | Single Level | Subsurface | Monthly Mean Pressure Level | Monthly Mean Single Level | Monthly Mean Subsurface ]

Brief Description:

  • NOAA-CIRES 20th Century Reanalysis V2c contains objectively-analyzed 4-dimensional weather maps and their uncertainty from the mid 19th century to 21st century.

Temporal Coverage:

  • Monthly values for 1851/01 to 2014/12.
  • Monthly Regular Grids are from 4-times Daily Analysis.
  • Monthly Gaussian Grids are from 8-times Daily 3-hr Forecasts.
  • Long Term Mean Monthly values averaged 1981-2010 .

Spatial Coverage:

    Analyses
  • 2.0 degree latitude x 2.0 degree longitude global grid (180x91).
  • 90N - 90.0S, 0.0E - 358.E.
  • 3-Hour Forecasts
  • ~2.0 degree latitude x 1.75 degree longitude global grid (192x94).
  • T62 Gaussian grid with 192x94 points
  • 88.542N-88.542S, 0E-358.125E.

Levels:

  • single level files

Update Schedule:

  • Irregular

Usage Restrictions:

  • None

Detailed Description:

    • Observations (Pressure): ISPD version 3.2.9. The surface pressure observations have been made available through international cooperation facilitated by the Atmospheric Circulation Reconstructions over the Earth (ACRE) initiative and working groups of the Global Climate Observing System and World Climate Research Programme.
    • Sea Surface Temperature Boundary Condition: prior to 2013: 18 members of pentad Simple Ocean Data Assimilation with Sparse Input (SODAsi) version 2 (SODAsi.2, Giese et al. 2016) with the high latitudes (>60) corrected to COBE-SST2 (Hirahara et al. 2014). 2013 onwards, NOAA OI SST V2 High Resolution Dataset (Reynolds et al. 2007).
    • Sea Ice Concentration Boundary Condition: monthly COBE-SST2 sea ice (Hirahara et al. 2014).
    • Model: NCEP GFS 2008ex (Compo et al. 2011) but with sea ice concentration specification down to fractions of 0.15 permitted. Previously fraction was truncated at 0.5. Additionally, the sea ice concentration misspecification noted in Compo et al. (2011) is corrected.
    • Assimilation: Ensemble Filter. Same algorithm as in 20CRv2 and as described in Compo et al. (2011), Compo et al. (2006), Whitaker et al. (2004).
    • Streams: As in Compo et al. 2011, every 5th year is produced in parallel for a continuous 5 year stream that started from November of stream year-1. Stream years are 1850,1855,...,2000, 2005. Released data start in January of stream year + 1, e.g., 1851 to 1855, 1856 to 1860, ..., 2001 to 2005. stream year 2005 is extended to 2011 and will be extended beyond.
    • Additional details: Compo, G.P., J.S. Whitaker, P.D. Sardeshmukh, B. Giese, and P. Brohan, 2015: Intercomparison of an improved 20th Century Reanalysis version "2c" (1850-2012), American Meteorological Society Annual meeting, Phoenix, AZ, January 2015. Presentation.
    • Model Notes: Briefly, the model has a spatial resolution of nearly 200-km on an irregular Gaussian grid in the horizontal (corresponding to a spherical harmonic representation of model fields truncated at total wavenumber 62, T62). In the vertical, we use finite differencing of 28 levels. The model has a complete suite of physical parameterizations as described in Kanamitsu et al. (1991) with recent updates detailed in Moorthi et al. (2001). Additional updates to these parameterizations are described in Saha et al. and include revised solar radiation transfer, boundary layer vertical diffusion, cumulus convection, and gravity wave drag parameterizations. In addition, the cloud liquid water is a prognostic quantity with a simple cloud microphysics parameterization. The radiation interacts with a fractional cloud cover that is diagnostically determined by the predicted cloud liquid water. Radiation also interacts with a 3 dimensional prognostic ozone that is determined from a gas-phase parameterization of ozone production and loss (McCormack et al. 2006) implemented by NCEP/EMC (Moorthi, personal communication). The 2008 experimental version of the model used for the 20th Century Reanalysis also includes the radiative effects of historical time-varying CO2 concentrations, volcanic aerosol and solar variations using the longwave radiation model of Mlawer et al. (1997) and shortwave radiation model of Hou et al. (2002). The specified boundary conditions needed to run the model in atmosphere-only mode are taken from the time-evolving sea surface temperature and sea ice concentration fields.
    References
    • Compo,G.P., J.S. Whitaker, and P.D. Sardeshmukh, 2006: Feasibility of a 100 year reanalysis using only surface pressure data. Bull. Amer. Met. Soc., 87, 175-190, doi:10.1175/BAMS-87-2-175.
    • Compo, G.P., J.S. Whitaker, P.D. Sardeshmukh, N. Matsui, R.J. Allan, X. Yin, B.E. Gleaso n, R.S. Vose, G. Rutledge, P. Bessemoulin, S. Brönnimann, M. Brunet, R.I. Crouthamel, A.N . Grant, P.Y. Groisman, P.D. Jones, M. Kruk, A.C. Kruger, G.J. Marshall, M. Maugeri, H.Y . Mok, Ø. Nordli, T.F. Ross, R.M. Trigo, X.L. Wang, S.D. Woodruff, and S.J. Worley, 2011: The Twentieth Century Reanalysis Project. Quarterly J. Roy. Meteorol. Soc., 137, 1-28. DOI: 10.1002/qj.776
    • Shoji Hirahara, Masayoshi Ishii, and Yoshikazu Fukuda, 2014: Centennial-Scale Sea Surface Temperature Analysis and Its Uncertainty. J. Climate,27, 57-75. doi: http://dx.doi.org/10.1175/JCLI-D-12-00837.1
    • Whitaker, J.S., G.P.Compo, X. Wei, and T.M. Hamill 2004: Reanalysis without radiosondes using ensemble data assimilation. Mon. Wea. Rev., 132, 1190-1200, doi:10.1175/1520-0493( 2004)132<1190:RWRUED>2.0.CO;2.
    • Cram, T.A., G. P. Compo, X. Yin, R. J. Allan, C. McColl, R. S. Vose, J.S. Whitaker, N. Matsui, L. Ashcroft, R. Auchmann, P. Bessemoulin, T. Brandsma, P. Brohan, M. Brunet, J. Comeaux, R. Crouthamel, B. E. Gleason, Jr., P. Y. Groisman, H. Hersbach, P. D. Jones, T. Jonsson, S. Jourdain, G. Kelly, K. R. Knapp, A. Kruger, H. Kubota, G. Lentini, A. Lorrey, N. Lott, S. J. Lubker, J. Luterbacher, G. J. Marshall, M. Maugeri, C. J. Mock, H. Y. Mok, O. Nordli, M. J. Rodwell, T. F. Ross, D. Schuster, L. Srnec, M. A. Valente, Z. Vizi, X. L. Wang, N. Westcott, J. S. Woollen, S. J. Worley, 2015: The International Surface Pressure Databank version 2. Geoscience Data J.,2,31-46, doi:10.1002/gdj3.25. (ISPD V3.2.9)
    • Giese, B.S., H.F. Seidel, G.P. Compo, and P.D. Sardeshmukh, 2016: An ensemble of ocean reanalyses for 1815-2013 with sparse observational input. J. Geophys. Res. Oceans, 121, 6891-6910, doi:10.1002/2016JC012079. (SODAsi.2 )

Caveats:

Download/Plot Data:

Variable Statistic Level Download File Create Plot/Subset
Air temperature Monthly Means sigma level 0.995 air.sig995.mon.mean.nc plot File Metadata
Air temperature Monthly Long Term Means sigma level 0.995 air.sig995.mon.ltm.nc plot File Metadata
Air temperature Monthly Ensemble Spreads sigma level 0.995 air.sig995.mon.mean.nc plot File Metadata
Air temperature Monthly Means Tropopause air.tropo.mon.mean.nc plot File Metadata
Air temperature Monthly Long Term Means Tropopause air.tropo.mon.ltm.nc plot File Metadata
Air temperature Monthly Ensemble Spreads Tropopause air.tropo.mon.mean.nc plot File Metadata
Convective available potential energy Monthly Means Surface cape.mon.mean.nc plot File Metadata
Convective available potential energy Monthly Long Term Means Surface cape.mon.ltm.nc plot File Metadata
Convective available potential energy Monthly Ensemble Spreads Surface cape.mon.mean.nc plot File Metadata
Canopy Water Evaporation Monthly Means Surface evcw.mon.mean.nc plot File Metadata
Canopy Water Evaporation Monthly Long Term Means Surface evcw.mon.ltm.nc plot File Metadata
Canopy Water Evaporation Monthly Ensemble Spreads Surface evcw.mon.mean.nc plot File Metadata
convective inhibition Monthly Means Surface cin.mon.mean.nc plot File Metadata
convective inhibition Monthly Long Term Means Surface cin.mon.ltm.nc plot File Metadata
convective inhibition Monthly Ensemble Spreads Surface cin.mon.mean.nc plot File Metadata
Cloud Water Content Monthly Means Entire Atmosphere Considered As a Single Layer cldwtr.eatm.mon.mean.nc plot File Metadata
Cloud Water Content Monthly Long Term Means Entire Atmosphere Considered As a Single Layer cldwtr.eatm.mon.ltm.nc plot File Metadata
Cloud Water Content Monthly Ensemble Spreads Entire Atmosphere Considered As a Single Layer cldwtr.eatm.mon.mean.nc plot File Metadata
Direct Evaporation From Bare Soil Monthly Means Surface evbs.mon.mean.nc plot File Metadata
Direct Evaporation From Bare Soil Monthly Long Term Means Surface evbs.mon.ltm.nc plot File Metadata
Direct Evaporation From Bare Soil Monthly Ensemble Spreads Surface evbs.mon.mean.nc plot File Metadata
Exchange Coefficient Monthly Means Surface sfexc.mon.mean.nc plot File Metadata
Exchange Coefficient Monthly Long Term Means Surface sfexc.mon.ltm.nc plot File Metadata
Exchange Coefficient Monthly Ensemble Spreads Surface cldwtr.eatm.mon.mean.nc plot File Metadata
Geopotential height Monthly Means Tropopause hgt.tropo.mon.mean.nc plot File Metadata
Geopotential height Monthly Long Term Means Tropopause hgt.tropo.mon.ltm.nc plot File Metadata
Geopotential height Monthly Ensemble Spreads Tropopause hgt.tropo.mon.mean.nc plot File Metadata
Omega (dp/dt) Monthly Means sigma level 0.995 omega.sig995.mon.mean.nc plot File Metadata
Omega (dp/dt) Monthly Long Term Means sigma level 0.995 omega.sig995.mon.ltm.nc plot File Metadata
Omega (dp/dt) Monthly Ensemble Spreads sigma level 0.995 omega.sig995.mon.mean.nc plot File Metadata
Potential Temperature Monthly Means sigma level 0.995 pottmp.sig995.mon.mean.nc plot File Metadata
Potential Temperature Monthly Long Term Means sigma level 0.995 pottmp.sig995.mon.ltm.nc plot File Metadata
Potential Temperature Monthly Ensemble Spreads sigma level 0.995 pottmp.sig995.mon.mean.nc plot File Metadata
Precipitable Water Content Monthly Means Entire Atmosphere Considered As a Single Layer pr_wtr.eatm.mon.mean.nc plot File Metadata
Precipitable Water Content Monthly Long Term Means Entire Atmosphere Considered As a Single Layer pr_wtr.eatm.mon.ltm.nc plot File Metadata
Precipitable Water Content Monthly Ensemble Spreads Entire Atmosphere Considered As a Single Layer pr_wtr.eatm.mon.mean.nc plot File Metadata
Precipitable Water Content Monthly Long Term Mean Ensemble Spreads Entire Atmosphere Considered As a Single Layer pr_wtr.eatm.mon.ltm.nc plot File Metadata
Pressure Monthly Means Surface pres.sfc.mon.mean.nc plot File Metadata
Pressure Monthly Long Term Means Surface pres.sfc.mon.ltm.nc plot File Metadata
Pressure Monthly Ensemble Spreads Surface pres.sfc.mon.mean.nc plot File Metadata
Pressure Monthly Means Tropopause pres.tropo.mon.mean.nc plot File Metadata
Pressure Monthly Long Term Means Tropopause pres.tropo.mon.ltm.nc plot File Metadata
Pressure Monthly Ensemble Spreads Tropopause pres.tropo.mon.mean.nc plot File Metadata
Mean Sea Level Pressure Monthly Means Mean Sea Level prmsl.mon.mean.nc plot File Metadata
Mean Sea Level Pressure Monthly Long Term Means Mean Sea Level prmsl.mon.ltm.nc plot File Metadata
Mean Sea Level Pressure Monthly Ensemble Spreads Mean Sea Level prmsl.mon.mean.nc plot File Metadata
Relative Humidity Monthly Means sigma level 0.995 rhum.sig995.mon.mean.nc plot File Metadata
Relative Humidity Monthly Long Term Means sigma level 0.995 rhum.sig995.mon.ltm.nc plot File Metadata
Relative Humidity Monthly Ensemble Spreads sigma level 0.995 rhum.sig995.mon.mean.nc plot File Metadata
Sublimation Monthly Means Surface sbsno.mon.mean.nc plot File Metadata
Sublimation Monthly Long Term Means Surface sbsno.mon.ltm.nc plot File Metadata
Sublimation Monthly Ensemble Spreads Surface cldwtr.eatm.mon.mean.nc plot File Metadata
total columnar ozone Monthly Means Entire Atmosphere Considered As a Single Layer tco3.eatm.mon.mean.nc plot File Metadata
total columnar ozone Monthly Long Term Means Entire Atmosphere Considered As a Single Layer tco3.eatm.mon.ltm.nc plot File Metadata
total columnar ozone Monthly Ensemble Spreads Entire Atmosphere Considered As a Single Layer tco3.eatm.mon.mean.nc plot File Metadata
u-wind Monthly Means sigma level 0.995 uwnd.sig995.mon.mean.nc plot File Metadata
u-wind Monthly Long Term Means sigma level 0.995 uwnd.sig995.mon.ltm.nc plot File Metadata
u-wind Monthly Ensemble Spreads sigma level 0.995 uwnd.sig995.mon.mean.nc plot File Metadata
UV-B Downward Solar Flux Monthly Means Surface duvb.mon.mean.nc plot File Metadata
UV-B Downward Solar Flux Monthly Long Term Means Surface duvb.mon.ltm.nc plot File Metadata
UV-B Downward Solar Flux Monthly Ensemble Spreads Surface duvb.mon.mean.nc plot File Metadata
u-wind Monthly Means Tropopause uwnd.tropo.mon.mean.nc plot File Metadata
u-wind Monthly Long Term Means Tropopause uwnd.tropo.mon.ltm.nc plot File Metadata
u-wind Monthly Ensemble Spreads Tropopause uwnd.tropo.mon.mean.nc plot File Metadata
v-wind Monthly Means sigma level 0.995 vwnd.sig995.mon.mean.nc plot File Metadata
v-wind Monthly Long Term Means sigma level 0.995 vwnd.sig995.mon.ltm.nc plot File Metadata
v-wind Monthly Ensemble Spreads sigma level 0.995 vwnd.sig995.mon.mean.nc plot File Metadata
v-wind Monthly Means Tropopause vwnd.tropo.mon.mean.nc plot File Metadata
v-wind Monthly Long Term Means Tropopause vwnd.tropo.mon.ltm.nc plot File Metadata
v-wind Monthly Ensemble Spreads Tropopause vwnd.tropo.mon.mean.nc plot File Metadata

Gaussian Gridded (192x94) data. From 3-hr Forecast Values (8 times daily)

Variable Statistic Level Download File Create Plot/Subset
Air Temperature Monthly Means 2 m air.2m.mon.mean.nc plot File Metadata
Air Temperature Monthly Long Term Means 2 m air.2m.mon.ltm.nc plot File Metadata
Air Temperature Monthly Ensemble Spreads 2 m air.2m.mon.mean.nc plot File Metadata
Air Temperature Monthly Long Term Mean Ensemble Spreads 2 m air.2m.mon.ltm.nc plot File Metadata
Air Temperature Monthly Means Surface air.sfc.mon.mean.nc plot File Metadata
Air Temperature Monthly Long Term Means Surface air.sfc.mon.ltm.nc plot File Metadata
Air Temperature Monthly Ensemble Spreads Surface air.sfc.mon.mean.nc plot File Metadata
Air Temperature Monthly Long Term Mean Ensemble Spreads Surface air.sfc.mon.ltm.nc plot File Metadata
Albedo Monthly Means Surface albedo.mon.mean.nc plot File Metadata
Albedo Monthly Long Term Means Surface albedo.mon.ltm.nc plot File Metadata
Albedo Monthly Ensemble Spreads Surface albedo.mon.mean.nc plot File Metadata
Albedo Monthly Long Term Mean Ensemble Spreads Surface albedo.mon.ltm.nc plot File Metadata
Clear Sky UV-B Downward Solar Flux Monthly Means Surface cduvb.mon.mean.nc plot File Metadata
Clear Sky UV-B Downward Solar Flux Monthly Long Term Means Surface cduvb.mon.ltm.nc plot File Metadata
Clear Sky UV-B Downward Solar Flux Monthly Ensemble Spreads Surface cduvb.mon.mean.nc plot File Metadata
Clear Sky UV-B Downward Solar Flux Monthly Long Term Mean Ensemble Spreads Surface cduvb.mon.ltm.nc plot File Metadata
Plant Canopy Surface Water Monthly Means Surface cnwat.mon.mean.nc plot File Metadata
Plant Canopy Surface Water Monthly Long Term Means Surface cnwat.mon.ltm.nc plot File Metadata
Plant Canopy Surface Water Monthly Ensemble Spreads Surface cnwat.mon.mean.nc plot File Metadata
Plant Canopy Surface Water Monthly Long Term Mean Ensemble Spreads Surface cnwat.mon.ltm.nc plot File Metadata
Convective Precipitation Rate Monthly Means Surface cprat.mon.mean.nc plot File Metadata
Convective Precipitation Rate Monthly Long Term Means Surface cprat.mon.ltm.nc plot File Metadata
Convective Precipitation Rate Monthly Ensemble Spreads Surface cprat.mon.mean.nc plot File Metadata
Convective Precipitation Rate Monthly Long Term Mean Ensemble Spreads Surface cprat.mon.ltm.nc plot File Metadata
Cloud Work Function Monthly Means Entire Atmosphere Considered As a Single Layer cwork.eatm.mon.mean.nc plot File Metadata
Cloud Work Function Monthly Long Term Means Entire Atmosphere Considered As a Single Layer cwork.eatm.mon.ltm.nc plot File Metadata
Cloud Work Function Monthly Ensemble Spreads Entire Atmosphere Considered As a Single Layer cwork.eatm.mon.mean.nc plot File Metadata
Cloud Work Function Monthly Long Term Mean Ensemble Spreads Entire Atmosphere Considered As a Single Layer cwork.eatm.mon.ltm.nc plot File Metadata
Downward Longwave Radiation Flux Monthly Means Surface dlwrf.sfc.mon.mean.nc plot File Metadata
Downward Longwave Radiation Flux Monthly Long Term Means Surface dlwrf.sfc.mon.ltm.nc plot File Metadata
Downward Longwave Radiation Flux Monthly Ensemble Spreads Surface dlwrf.sfc.mon.mean.nc plot File Metadata
Downward Longwave Radiation Flux Monthly Long Term Mean Ensemble Spreads Surface dlwrf.sfc.mon.ltm.nc plot File Metadata
Downward Solar Radiation Flux Monthly Means Surface dswrf.sfc.mon.mean.nc plot File Metadata
Downward Solar Radiation Flux Monthly Long Term Means Surface dswrf.sfc.mon.ltm.nc plot File Metadata
Downward Solar Radiation Flux Monthly Ensemble Spreads Surface dswrf.sfc.mon.mean.nc plot File Metadata
Downward Solar Radiation Flux Monthly Long Term Mean Ensemble Spreads Surface dswrf.sfc.mon.ltm.nc plot File Metadata
UV-B Downward Solar Flux Monthly Means Surface duvb.mon.mean.nc plot File Metadata
UV-B Downward Solar Flux Monthly Long Term Means Surface duvb.mon.ltm.nc plot File Metadata
UV-B Downward Solar Flux Monthly Ensemble Spreads Surface duvb.mon.mean.nc plot File Metadata
UV-B Downward Solar Flux Monthly Long Term Mean Ensemble Spreads Surface duvb.mon.ltm.nc plot File Metadata
Direct Evaporation From Bare Soil Monthly Means Surface evbs.mon.mean.nc plot File Metadata
Direct Evaporation From Bare Soil Monthly Long Term Means Surface evbs.mon.ltm.nc plot File Metadata
Direct Evaporation From Bare Soil Monthly Ensemble Spreads Surface evbs.mon.mean.nc plot File Metadata
Direct Evaporation From Bare Soil Monthly Long Term Mean Ensemble Spreads Surface evbs.mon.ltm.nc plot File Metadata
Canopy Water Evaporation Monthly Means Surface evcw.mon.mean.nc plot File Metadata
Canopy Water Evaporation Monthly Long Term Means Surface evcw.mon.ltm.nc plot File Metadata
Canopy Water Evaporation Monthly Ensemble Spreads Surface evcw.mon.mean.nc plot File Metadata
Canopy Water Evaporation Monthly Long Term Mean Ensemble Spreads Surface evcw.mon.ltm.nc plot File Metadata
Ground Heat Flux Monthly Means Surface gflux.mon.mean.nc plot File Metadata
Ground Heat Flux Monthly Long Term Means Surface gflux.mon.ltm.nc plot File Metadata
Ground Heat Flux Monthly Ensemble Spreads Surface gflux.mon.mean.nc plot File Metadata
Ground Heat Flux Monthly Long Term Mean Ensemble Spreads Surface gflux.mon.ltm.nc plot File Metadata
Planetary Boundary Layer Height Monthly Means Surface hpbl.mon.mean.nc plot File Metadata
Planetary Boundary Layer Height Monthly Long Term Means Surface hpbl.mon.ltm.nc plot File Metadata
Planetary Boundary Layer Height Monthly Ensemble Spreads Surface hpbl.mon.mean.nc plot File Metadata
Planetary Boundary Layer Height Monthly Long Term Mean Ensemble Spreads Surface hpbl.mon.ltm.nc plot File Metadata
Ice Concentration Monthly Means Surface icec.mon.mean.nc plot File Metadata
Ice Concentration Monthly Long Term Means Surface icec.mon.ltm.nc plot File Metadata
ice thickness Monthly Means Surface icet.mon.mean.nc plot File Metadata
ice thickness Monthly Long Term Means Surface icet.mon.ltm.nc plot File Metadata
ice thickness Monthly Ensemble Spreads Surface icet.mon.mean.nc plot File Metadata
ice thickness Monthly Long Term Mean Ensemble Spreads Surface icet.mon.ltm.nc plot File Metadata
Latent Heat Net Flux Monthly Means Surface lhtfl.mon.mean.nc plot File Metadata
Latent Heat Net Flux Monthly Long Term Means Surface lhtfl.mon.ltm.nc plot File Metadata
Latent Heat Net Flux Monthly Ensemble Spreads Surface lhtfl.mon.mean.nc plot File Metadata
Latent Heat Net Flux Monthly Long Term Mean Ensemble Spreads Surface lhtfl.mon.ltm.nc plot File Metadata
Potential Evaporation Rate Monthly Means Surface pevpr.mon.mean.nc plot File Metadata
Potential Evaporation Rate Monthly Long Term Means Surface pevpr.mon.ltm.nc plot File Metadata
Potential Evaporation Rate Monthly Ensemble Spreads Surface pevpr.mon.mean.nc plot File Metadata
Potential Evaporation Rate Monthly Long Term Mean Ensemble Spreads Surface pevpr.mon.ltm.nc plot File Metadata
Precipitable Water Content Monthly Means Entire Atmosphere Considered As a Single Layer pr_wtr.eatm.mon.mean.nc plot File Metadata
Precipitable Water Content Monthly Long Term Means Entire Atmosphere Considered As a Single Layer pr_wtr.eatm.mon.ltm.nc plot File Metadata
Precipitable Water Content Monthly Ensemble Spreads Entire Atmosphere Considered As a Single Layer pr_wtr.eatm.mon.mean.nc plot File Metadata
Precipitable Water Content Monthly Long Term Mean Ensemble Spreads Entire Atmosphere Considered As a Single Layer pr_wtr.eatm.mon.ltm.nc plot File Metadata
Precipitation Rate Monthly Means Surface prate.mon.mean.nc plot File Metadata
Precipitation Rate Monthly Long Term Means Surface prate.mon.ltm.nc plot File Metadata
Precipitation Rate Monthly Ensemble Spreads Surface prate.mon.mean.nc plot File Metadata
Precipitation Rate Monthly Long Term Mean Ensemble Spreads Surface prate.mon.ltm.nc plot File Metadata
Surface Pressure Monthly Means Surface press.sfc.mon.mean.nc plot File Metadata
Surface Pressure Monthly Long Term Means Surface press.sfc.mon.ltm.nc plot File Metadata
Surface Pressure Monthly Ensemble Spreads Surface press.sfc.mon.mean.nc plot File Metadata
Surface Pressure Monthly Long Term Mean Ensemble Spreads Surface press.sfc.mon.ltm.nc plot File Metadata
Water Runoff Monthly Means Surface runoff.mon.mean.nc plot File Metadata
Water Runoff Monthly Long Term Means Surface runoff.mon.ltm.nc plot File Metadata
Water Runoff Monthly Ensemble Spreads Surface runoff.mon.mean.nc plot File Metadata
Water Runoff Monthly Long Term Mean Ensemble Spreads Surface runoff.mon.ltm.nc plot File Metadata
Sublimation (Evaporation From Snow) Monthly Means Surface sbsno.mon.mean.nc plot File Metadata
Sublimation (Evaporation From Snow) Monthly Long Term Means Surface sbsno.mon.ltm.nc plot File Metadata
Sublimation (Evaporation From Snow) Monthly Ensemble Spreads Surface sbsno.mon.mean.nc plot File Metadata
Sublimation (Evaporation From Snow) Monthly Long Term Mean Ensemble Spreads Surface sbsno.mon.ltm.nc plot File Metadata
Exchange Coefficient Monthly Means Surface sfexc.mon.mean.nc plot File Metadata
Exchange Coefficient Monthly Long Term Means Surface sfexc.mon.ltm.nc plot File Metadata
Exchange Coefficient Monthly Ensemble Spreads Surface sfexc.mon.mean.nc plot File Metadata
Exchange Coefficient Monthly Long Term Mean Ensemble Spreads Surface sfexc.mon.ltm.nc plot File Metadata
Sensible Heat Net Flux Monthly Means Surface shtfl.mon.mean.nc plot File Metadata
Sensible Heat Net Flux Monthly Long Term Means Surface shtfl.mon.ltm.nc plot File Metadata
Sensible Heat Net Flux Monthly Ensemble Spreads Surface shtfl.mon.mean.nc plot File Metadata
Sensible Heat Net Flux Monthly Long Term Mean Ensemble Spreads Surface shtfl.mon.ltm.nc plot File Metadata
Specific Humidity Monthly Means 2 m shum.2m.mon.mean.nc plot File Metadata
Specific Humidity Monthly Long Term Means 2 m shum.2m.mon.ltm.nc plot File Metadata
Specific Humidity Monthly Ensemble Spreads 2 m shum.2m.mon.mean.nc plot File Metadata
Specific Humidity Monthly Long Term Mean Ensemble Spreads 2 m shum.2m.mon.ltm.nc plot File Metadata
snow depth Monthly Means Surface snod.mon.mean.nc plot File Metadata
snow depth Monthly Long Term Means Surface snod.mon.ltm.nc plot File Metadata
snow depth Monthly Ensemble Spreads Surface snod.mon.mean.nc plot File Metadata
snow depth Monthly Long Term Mean Ensemble Spreads Surface snod.mon.ltm.nc plot File Metadata
snow cover Monthly Means Surface snowc.mon.mean.nc plot File Metadata
snow cover Monthly Long Term Means Surface snowc.mon.ltm.nc plot File Metadata
snow cover Monthly Ensemble Spreads Surface snowc.mon.mean.nc plot File Metadata
snow cover Monthly Long Term Mean Ensemble Spreads Surface snowc.mon.ltm.nc plot File Metadata
soil moisture content Monthly Means Between 0-200 cm BGL soilm.mon.mean.nc plot File Metadata
soil moisture content Monthly Long Term Means Between 0-200 cm BGL soilm.mon.ltm.nc plot File Metadata
soil moisture content Monthly Ensemble Spreads Between 0-200 cm BGL soilm.mon.mean.nc plot File Metadata
soil moisture content Monthly Long Term Mean Ensemble Spreads Between 0-200 cm BGL soilm.mon.ltm.nc plot File Metadata
storm surface runoff Monthly Means Surface ssrunoff.mon.mean.nc plot File Metadata
storm surface runoff Monthly Long Term Means Surface ssrunoff.mon.ltm.nc plot File Metadata
storm surface runoff Monthly Ensemble Spreads Surface ssrunoff.mon.mean.nc plot File Metadata
storm surface runoff Monthly Long Term Mean Ensemble Spreads Surface ssrunoff.mon.ltm.nc plot File Metadata
Total cloud cover Monthly Means Boundary Layer tcdc.bndrylyr.mon.mean.nc plot File Metadata
Total cloud cover Monthly Long Term Means Boundary Layer tcdc.bndrylyr.mon.ltm.nc plot File Metadata
Total cloud cover Monthly Ensemble Spreads Boundary Layer tcdc.bndrylyr.mon.mean.nc plot File Metadata
Total cloud cover Monthly Long Term Mean Ensemble Spreads Boundary Layer tcdc.bndrylyr.mon.ltm.nc plot File Metadata
Total cloud cover Monthly Means Convective Cloud Layer tcdc.convcld.mon.mean.nc plot File Metadata
Total cloud cover Monthly Long Term Means Convective Cloud Layer tcdc.convcld.mon.ltm.nc plot File Metadata
Total cloud cover Monthly Ensemble Spreads Convective Cloud Layer tcdc.convcld.mon.mean.nc plot File Metadata
Total cloud cover Monthly Long Term Mean Ensemble Spreads Convective Cloud Layer tcdc.convcld.mon.ltm.nc plot File Metadata
Total cloud cover Monthly Means Entire Atmosphere Considered As a Single Layer tcdc.eatm.mon.mean.nc plot File Metadata
Total cloud cover Monthly Long Term Means Entire Atmosphere Considered As a Single Layer tcdc.eatm.mon.ltm.nc plot File Metadata
Total cloud cover Monthly Ensemble Spreads Entire Atmosphere Considered As a Single Layer tcdc.eatm.mon.mean.nc plot File Metadata
Total cloud cover Monthly Long Term Mean Ensemble Spreads Entire Atmosphere Considered As a Single Layer tcdc.eatm.mon.ltm.nc plot File Metadata
Total cloud cover Monthly Means Low Cloud Layer tcdc.lowcld.mon.mean.nc plot File Metadata
Total cloud cover Monthly Long Term Means Low Cloud Layer tcdc.lowcld.mon.ltm.nc plot File Metadata
Total cloud cover Monthly Ensemble Spreads Low Cloud Layer tcdc.lowcld.mon.mean.nc plot File Metadata
Total cloud cover Monthly Long Term Mean Ensemble Spreads Low Cloud Layer tcdc.lowcld.mon.ltm.nc plot File Metadata
Total cloud cover Monthly Means Middle Cloud Layer tcdc.midcld.mon.mean.nc plot File Metadata
Total cloud cover Monthly Long Term Means Middle Cloud Layer tcdc.midcld.mon.ltm.nc plot File Metadata
Total cloud cover Monthly Ensemble Spreads Middle Cloud Layer tcdc.midcld.mon.mean.nc plot File Metadata
Total cloud cover Monthly Long Term Mean Ensemble Spreads Middle Cloud Layer tcdc.midcld.mon.ltm.nc plot File Metadata
Total cloud cover Monthly Means Top Cloud Layer tcdc.topcld.mon.mean.nc plot File Metadata
Total cloud cover Monthly Long Term Means Top Cloud Layer tcdc.topcld.mon.ltm.nc plot File Metadata
Total cloud cover Monthly Ensemble Spreads Top Cloud Layer tcdc.topcld.mon.mean.nc plot File Metadata
Total cloud cover Monthly Long Term Mean Ensemble Spreads Top Cloud Layer tcdc.topcld.mon.ltm.nc plot File Metadata
Maximum Temperature Monthly Means 2 m tmax.2m.mon.mean.nc plot File Metadata
Maximum Temperature Monthly Long Term Means 2 m tmax.2m.mon.ltm.nc plot File Metadata
Maximum Temperature Monthly Ensemble Spreads 2 m tmax.2m.mon.mean.nc plot File Metadata
Maximum Temperature Monthly Long Term Mean Ensemble Spreads 2 m tmax.2m.mon.ltm.nc plot File Metadata
Minimum Temperature Monthly Means 2 m tmin.2m.mon.mean.nc plot File Metadata
Minimum Temperature Monthly Long Term Means 2 m tmin.2m.mon.ltm.nc plot File Metadata
Minimum Temperature Monthly Ensemble Spreads 2 m tmin.2m.mon.mean.nc plot File Metadata
Minimum Temperature Monthly Long Term Mean Ensemble Spreads 2 m tmin.2m.mon.ltm.nc plot File Metadata
transpiration Monthly Means Surface trans.mon.mean.nc plot File Metadata
transpiration Monthly Long Term Means Surface trans.mon.ltm.nc plot File Metadata
transpiration Monthly Ensemble Spreads Surface trans.mon.mean.nc plot File Metadata
transpiration Monthly Long Term Mean Ensemble Spreads Surface trans.mon.ltm.nc plot File Metadata
Momentum Flux, u-component Monthly Means Surface uflx.mon.mean.nc plot File Metadata
Momentum Flux, u-component Monthly Long Term Means Surface uflx.mon.ltm.nc plot File Metadata
Momentum Flux, u-component Monthly Ensemble Spreads Surface uflx.mon.mean.nc plot File Metadata
Momentum Flux, u-component Monthly Long Term Mean Ensemble Spreads Surface uflx.mon.ltm.nc plot File Metadata
Zonal Gravity Wave Stress Monthly Means Surface ugwd.mon.mean.nc plot File Metadata
Zonal Gravity Wave Stress Monthly Long Term Means Surface ugwd.mon.ltm.nc plot File Metadata
Zonal Gravity Wave Stress Monthly Ensemble Spreads Surface ugwd.mon.mean.nc plot File Metadata
Zonal Gravity Wave Stress Monthly Long Term Mean Ensemble Spreads Surface ugwd.mon.ltm.nc plot File Metadata
Upward Longwave Radiation Flux Monthly Means Nominal top of atmosphere ulwrf.ntat.mon.mean.nc plot File Metadata
Upward Longwave Radiation Flux Monthly Long Term Means Nominal top of atmosphere ulwrf.ntat.mon.ltm.nc plot File Metadata
Upward Longwave Radiation Flux Monthly Ensemble Spreads Nominal top of atmosphere ulwrf.ntat.mon.mean.nc plot File Metadata
Upward Longwave Radiation Flux Monthly Long Term Mean Ensemble Spreads Nominal top of atmosphere ulwrf.ntat.mon.ltm.nc plot File Metadata
Upward Longwave Radiation Flux Monthly Means Surface ulwrf.sfc.mon.mean.nc plot File Metadata
Upward Longwave Radiation Flux Monthly Long Term Means Surface ulwrf.sfc.mon.ltm.nc plot File Metadata
Upward Longwave Radiation Flux Monthly Ensemble Spreads Surface ulwrf.sfc.mon.mean.nc plot File Metadata
Upward Longwave Radiation Flux Monthly Long Term Mean Ensemble Spreads Surface ulwrf.sfc.mon.ltm.nc plot File Metadata
Upward Shortwave Radiation Flux Monthly Means Nominal top of atmosphere uswrf.ntat.mon.mean.nc plot File Metadata
Upward Shortwave Radiation Flux Monthly Long Term Means Nominal top of atmosphere uswrf.ntat.mon.ltm.nc plot File Metadata
Upward Shortwave Radiation Flux Monthly Ensemble Spreads Nominal top of atmosphere uswrf.ntat.mon.mean.nc plot File Metadata
Upward Shortwave Radiation Flux Monthly Long Term Mean Ensemble Spreads Nominal top of atmosphere uswrf.ntat.mon.ltm.nc plot File Metadata
Upward Shortwave Radiation Flux Monthly Means Surface uswrf.sfc.mon.mean.nc plot File Metadata
Upward Shortwave Radiation Flux Monthly Long Term Means Surface uswrf.sfc.mon.ltm.nc plot File Metadata
Upward Shortwave Radiation Flux Monthly Ensemble Spreads Surface uswrf.sfc.mon.mean.nc plot File Metadata
Upward Shortwave Radiation Flux Monthly Long Term Mean Ensemble Spreads Surface uswrf.sfc.mon.ltm.nc plot File Metadata
U-wind Monthly Means 10 m uwnd.10m.mon.mean.nc plot File Metadata
U-wind Monthly Long Term Means 10 m uwnd.10m.mon.ltm.nc plot File Metadata
U-wind Monthly Ensemble Spreads 10 m uwnd.10m.mon.mean.nc plot File Metadata
U-wind Monthly Long Term Mean Ensemble Spreads 10 m uwnd.10m.mon.ltm.nc plot File Metadata
Momentum Flux, v-component Monthly Means Surface vflx.mon.mean.nc plot File Metadata
Momentum Flux, v-component Monthly Long Term Means Surface vflx.mon.ltm.nc plot File Metadata
Momentum Flux, v-component Monthly Ensemble Spreads Surface vflx.mon.mean.nc plot File Metadata
Momentum Flux, v-component Monthly Long Term Mean Ensemble Spreads Surface vflx.mon.ltm.nc plot File Metadata
Meridional Gravity Wave Stress Monthly Means Surface vgwd.mon.mean.nc plot File Metadata
Meridional Gravity Wave Stress Monthly Long Term Means Surface vgwd.mon.ltm.nc plot File Metadata
Meridional Gravity Wave Stress Monthly Ensemble Spreads Surface vgwd.mon.mean.nc plot File Metadata
Meridional Gravity Wave Stress Monthly Long Term Mean Ensemble Spreads Surface vgwd.mon.ltm.nc plot File Metadata
V-wind Monthly Means 10 m vwnd.10m.mon.mean.nc plot File Metadata
V-wind Monthly Long Term Means 10 m vwnd.10m.mon.ltm.nc plot File Metadata
V-wind Monthly Ensemble Spreads 10 m vwnd.10m.mon.mean.nc plot File Metadata
V-wind Monthly Long Term Mean Ensemble Spreads 10 m vwnd.10m.mon.ltm.nc plot File Metadata
Water Equiv. of Accum. Snow Depth Monthly Means Surface weasd.mon.mean.nc plot File Metadata
Water Equiv. of Accum. Snow Depth Monthly Long Term Means Surface weasd.mon.ltm.nc plot File Metadata
Water Equiv. of Accum. Snow Depth Monthly Ensemble Spreads Surface weasd.mon.mean.nc plot File Metadata
Water Equiv. of Accum. Snow Depth Monthly Long Term Mean Ensemble Spreads Surface weasd.mon.ltm.nc plot File Metadata

Related File Naming & Structure Information:

File Names:

  • 4-times daily /Datasets/20thC_ReanV2c/Monthlies/monolevel/filename
  • 4-times daily /Datasets/20thC_ReanV2c/Monthlies/monolevel_sprd/filename
  • 4-times daily /Datasets/20thC_ReanV2c/Monthlies/gaussian/monolevel/filename
  • 4-times daily /Datasets/20thC_ReanV2c/Monthlies/gaussian_sprd/monolevel/filename

Dataset Format and Size:

Missing Data:

  • Missing data is flagged with a value of -9.96921e+36f.

OpenDap File Names:

  • http://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/20thC_ReanV2c/Monthlies/monolevel/filename
  • http://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/20thC_ReanV2c/Monthlies/monolevel_sprd/filename

FTP File Names:

  • ftp.cdc.noaa.gov/Datasets/20thC_ReanV2c/Monthlies/monolevel/*
  • ftp.cdc.noaa.gov/Datasets/20thC_ReanV2c/Monthlies/monolevel_sprd/*

Citation:

  • Please note: If you acquire 20th Century Reanalysis V2c data products from PSD, we ask that you acknowledge us in your use of the data. This may be done by including text such as 20th Century Reanalysis V2c data provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site at http://www.esrl.noaa.gov/psd/ in any documents or publications using these data. We would also appreciate receiving a copy of the relevant publications. This will help PSD to justify keeping the 20th Century Reanalysis V2c data set freely available online in the future. Thank you!
  • The NOAA-CIRES Twentieth Century Reanalysis Project version 2c used resources of the National Energy Research Scientific Computing Center managed by Lawrence Berkeley National Laboratory which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.

    Papers using the NOAA-CIRES Twentieth Century Reanalysis Project version 2c dataset are requested to include the following text in their acknowledgments: "Support for the Twentieth Century Reanalysis Project version 2c dataset is provided by the U.S. Department of Energy, Office of Science Biological and Environmental Research (BER), and by the National Oceanic and Atmospheric Administration Climate Program Office

    • Giese, B.S., H.F. Seidel, G.P. Compo, and P.D. Sardeshmukh, 2016: An ensemble of ocean reanalyses for 1815-2013 with sparse observational input. J. Geophys. Res. Oceans, 121, 6891-6910, doi:10.1002/2016JC012079.
    • Compo,G.P., J.S. Whitaker, and P.D. Sardeshmukh, 2006: Feasibility of a 100 year reanalysis using only surface pressure data. Bull. Amer. Met. Soc., 87, 175-190, http://dx.doi.org/10.1175/BAMS-87-2-175.
    • Compo, G.P., J.S. Whitaker, P.D. Sardeshmukh, N. Matsui, R.J. Allan, X. Yin, B.E. Gleason, R.S. Vose, G. Rutledge, P. Bessemoulin, S. Brönnimann, M. Brunet, R.I. Crouthamel, A.N. Grant, P.Y. Groisman, P.D. Jones, M. Kruk, A.C. Kruger, G.J. Marshall, M. Maugeri, H.Y. Mok, Ø. Nordli, T.F. Ross, R.M. Trigo, X.L. Wang, S.D. Woodruff, and S.J. Worley, 2011: The Twentieth Century Reanalysis Project. Quarterly J. Roy. Meteorol. Soc., 137, 1-28. http://dx.doi.org/10.1002/qj.776
    • Reynolds, Richard W., Thomas M. Smith, Chunying Liu, Dudley B. Chelton, Kenneth S. Casey, Michael G. Schlax, 2007: Daily High-Resolution-Blended Analyses for Sea Surface Temperature. J. Climate, 20, 5473-5496.http://dx.doi.org/10.1175/2007JCLI1824.1
    • Shoji Hirahara, Masayoshi Ishii, and Yoshikazu Fukuda, 2014: Centennial-Scale Sea Surface Temperature Analysis and Its Uncertainty. J. Climate,27, 57-75. doi: http://dx.doi.org/10.1175/JCLI-D-12-00837.1
    • Whitaker, J.S., G.P.Compo, X. Wei, and T.M. Hamill 2004: Reanalysis without radiosondes using ensemble data assimilation. Mon. Wea. Rev., 132, 1190-1200, http://dx.doi.org/10.1175/1520-0493(2004)132<1190:RWRUED>2.0.CO;2

References:

Original Source:

  • Data are are courtesy of Gilbert Compo1,2 , Jeff Whitaker2, and Prashant Sardeshmukh1,2 . University of Colorado CIRES, 2. NOAA Earth System Research Laboratory - Physical Sciences Division.
  • The NOAA-CIRES Twentieth Century Reanalysis Project version 2c used resources of the National Energy Research Scientific Computing Center managed by Lawrence Berkeley National Laboratory which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
  • Papers using the NOAA-CIRES Twentieth Century Reanalysis Project version 2c dataset are requested to include the following text in their acknowledgments: "Support for the NOAA-CIRES Twentieth Century Reanalysis Project version 2c dataset is provided by the U.S. Department of Energy, Office of Science Biological and Environmental Research (BER), and by the National Oceanic and Atmospheric Administration Climate Program Office.

Other Sources:

Contact:

  • For help with the dataset please contact Gil Compo, Research Scientist, CIRES University of Colorado Email: compo@colorado.edu
  • Physical Sciences Division: Data Management
    NOAA/ESRL/PSD
    325 Broadway
    Boulder, CO 80305-3328
    esrl.psd.data@noaa.gov