NOAA CIRES Twentieth Century Global Reanalysis Version 2

The Twentieth Century Reanalysis Project, supported by the Earth System Research Laboratory Physical Sciences Division from NOAA and the University of Colorado CIRES Climate Diagnostics Center, is an effort to produce a global reanalysis dataset spanning a portion of the nineteenth century and the entire twentieth century (1871 - near present), assimilating only surface observations of synoptic pressure, monthly sea surface temperature and sea ice distribution. Products include 6-hourly ensemble mean and spread analysis fields on a 2 by 2 degree global latitude-longitude grid, and 3 and 6-hourly ensemble mean and spread forecast (first guess) fields on a global Gaussian T62 grid. Fields are accessible in yearly time series (1 file per parameter) and monthly synoptic time (all parameters per synoptic hour) files. Ensemble grids, spectral coefficients, and other information will available by offline request in the future.

The Twentieth Century Reanalysis Project used resources of the National Energy Research Scientific Computing Center managed by Lawrence Berkeley National Laboratory and of the Oak Ridge Leadership Computing Facility at Oak Ridge National Laboratory, which are supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 and Contract No. DE-AC05-00OR22725, respectively.

Note: Version 2c of this reanalysis (running from 1851 - 2011) is the recommended research version. Please see ds131.2 to access Version 2c.

To Access Resource:

Questions? Email Resource Support Contact:

  • datahelp@ucar.edu

Temporal Range

  • Begin:  1869-01-01T0000+00
    End:  2012-12-31T2100+00

Keywords

Resource Type dataset
Temporal Range Begin 1869-01-01T0000+00
Temporal Range End 2012-12-31T2100+00
Temporal Resolution N/A
Bounding Box North Lat N/A
Bounding Box South Lat N/A
Bounding Box West Long N/A
Bounding Box East Long N/A
Spatial Representation N/A
Spatial Resolution N/A
Related Links

Related Resource #1 : NOAA ESRL 20th Century Reanalysis Project Homepage

Related Resource #2 : Atmospheric Circulation Reconstructions over the Earth

Related Resource #3 : Oak Ridge Leadership Computing Facility

Related Resource #4 : NERSC science gateway. Selected 20th Century fields are available in NetCDF4 from every member of the analysis ensemble.

Related Resource #5 : Reanalysis Wiki for user/provider information exchange.

Related Resource #6 : NOAA ESRL 20th Century Reanalysis web page. Provides access to a NetCDF version of the data, and monthly means.

Related Resource #7 : NCAR Command Language GRIB to NetCDF file structure description.

Related Resource #8 : Individual Ensemble Member Grids from the 20th Century Reanalysis in GRIB format

Related Resource #9 : Summary of available global reanalysis dataset and collaboration space

Related Resource #10 : 20th Century Reanalysis status mailing list (Reanalysis-20cr-notify)
Additional Information N/A
Resource Format WMO GRIB1
Standardized Resource Format GRIB
Asset Size 13614052.417 MB
Legal Constraints

Creative Commons Attribution 4.0 International License
Access Constraints None
Software Implementation Language N/A

Resource Support Name N/A
Resource Support Email datahelp@ucar.edu
Resource Support Organization
Distributor NSF NCAR Geoscience Data Exchange

Metadata Contact Name N/A
Metadata Contact Email datahelp@ucar.edu
Metadata Contact Organization NSF NCAR Geoscience Data Exchange

Author Compo, Gilbert P. ORCID icon
Whitaker, Jeffrey S. ORCID icon
Sardeshmukh, Prashant D. ORCID icon
Matsui, Nobuki
Allan, Robert John
Yin, Xungang ORCID icon
Gleason, Byron E.
Vose, Russell S. ORCID icon
Rutledge, Glenn
Bessemoulin, Pierre
Bronnimann, Stefan ORCID icon
Brunet, Manola
Crouthamel, Richard I.
Grant, Andrea N. ORCID icon
Groisman, Pavel Y. ORCID icon
Jones, Philip D. ORCID icon
Kruk, Michael C. ORCID icon
Kruger, Andries C. ORCID icon
Marshall, Gareth J. ORCID icon
Maugeri, Maurizio ORCID icon
Mok, Hing Y.
Nordli, Oyvind ORCID icon
Ross, Thomas F.
Trigo, Ricardo M. ORCID icon
Wang, Xiaolan L. ORCID icon
Woodruff, Scott D.
Worley, Steven J. ORCID icon
Publisher NSF National Center for Atmospheric Research

Publication Date 2009-05-14
Digital Object Identifier (DOI) https://doi.org/10.5065/D6QR4V37
Alternate Identifier d131001
Resource Version N/A
Topic Category climatologyMeteorologyAtmosphere
Progress onGoing
Metadata Date 2026-04-18T15:00:47Z
Metadata Record Identifier edu.ucar.gdex::d131001
Metadata Language eng; USA
Suggested Citation Compo, Gilbert P., Whitaker, Jeffrey S., Sardeshmukh, Prashant D., Matsui, Nobuki, Allan, Robert John, Yin, Xungang, Gleason, Byron E., Vose, Russell S., Rutledge, Glenn, Bessemoulin, Pierre, Bronnimann, Stefan, Brunet, Manola, Crouthamel, Richard I., Grant, Andrea N., Groisman, Pavel Y., Jones, Philip D., Kruk, Michael C., Kruger, Andries C., Marshall, Gareth J., Maugeri, Maurizio, Mok, Hing Y., Nordli, Oyvind, Ross, Thomas F., Trigo, Ricardo M., Wang, Xiaolan L., Woodruff, Scott D., Worley, Steven J.. (2009). NOAA CIRES Twentieth Century Global Reanalysis Version 2. NSF National Center for Atmospheric Research. https://doi.org/10.5065/D6QR4V37. Accessed 18 April 2026.

Harvest Source