NOAA-CIRES-DOE Twentieth Century Reanalysis Version 3 

The Twentieth Century Reanalysis Project, produced by the Earth System Research Laboratory Physical Sciences Division from NOAA and the University of Colorado Cooperative Institute for Research in Environmental Sciences using resources from Department of Energy supercomputers, is an effort to produce a global reanalysis dataset spanning a portion of the nineteenth century and the entire twentieth century (1836 - 2015), assimilating only surface observations of synoptic pressure into an 80-member ensemble of estimates of the Earth system. Boundary conditions of pentad sea surface temperature and monthly sea ice concentration and time-varying solar, volcanic, and carbon dioxide radiative forcings are prescribed. Products include 3 and 6-hourly ensemble mean and spread analysis fields and 6-hourly ensemble mean and spread forecast (first guess) fields on a global Gaussian T254 grid. Fields are accessible in
yearly time series (1 file per parameter).


The NOAA-CIRES-DOE Twentieth Century Reanalysis Version 3 uses the NCEP Global Forecast Model that was
operational in autumn 2017, with differences as described in (Slivinski et al. 2019). Sea ice boundary conditions are specified from HadISST 2.3 (Slivinski et al. 2019). Sea surface temperature fields prior to 1981 are prescribed from the 8-member ensemble of pentad Simple Ocean Data Assimilation with sparse input (SODAsi.3, Giese et al. 2016) and from the 8-member ensemble of pentad HadISST 2.2 for 1981 to 2015. Observations from ISPD version 4.7 are assimilated using an ensemble Kalman filter.


The Twentieth Century Reanalysis Project version 3 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 and used resources of NOAA's Remote Deployed High Performance Computing Systems. Version 3 is a contribution to the international Atmospheric Circulation Reconstructions over the Earth initiative. Support for the Twentieth Century Reanalysis Project is provided by the Physical Sciences Division of the NOAA Earth System Research Laboratory, the U.S. Department of Energy Office of Science (BER), and the NOAA
Climate Program Office MAPP program.

To Access Resource:

Questions? Email Resource Support Contact:

  • datahelp@ucar.edu

Temporal Range

  • Begin:  1805-12-31T1800+00
    End:  2016-01-01T0000+00

Keywords

Resource Type dataset
Temporal Range Begin 1805-12-31T1800+00
Temporal Range End 2016-01-01T0000+00
Temporal Resolution N/A
Bounding Box North Lat 89.463
Bounding Box South Lat -89.463
Bounding Box West Long -180.0
Bounding Box East Long 180.0
Spatial Representation grid
Spatial Resolution 0.703 degree
Related Links

Related Resource #1 : Software that converts NetCDF files into WRF intermediate files.
Additional Information N/A
Resource Format NetCDF4
Standardized Resource Format NetCDF
Asset Size 105264164.592 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 N/A
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 Slivinski, Laura C.
Compo, Gilbert P.
Whitaker, Jeffrey S.
Sardeshmukh, Prashant D.
Giese, Benjamin S.
McColl, Chesley
Brohan, Phillip
Allan, Rob
Yin, Xungang
Vose, Russell
Titchner, Holly
Kennedy, John
Spencer, Lawrence J.
Ashcroft, Linden
Bronnimann, Stefan
Brunet, Manola
Camuffo, Dario
Cornes, Richard
Cram, Thomas A.
Crouthamel, Richard
Dominguez-Castro, Fernando
Freeman, J. Eric
Gergis, Joelle
Hawkins, Ed
Jones, Philip D.
Jourdain, Sylvie
Kaplan, Alexey
Kubota, Hisayuki
Blancq, Frank Le
Lee, Tsz-Cheung
Lorrey, Andrew
Luterbacher, Jurg
Maugeri, Maurizio
Mock, Cary J.
Moore, Kent
Przybylak, Rajmund
Pudmenzky, Christa
Reason, Chris
Slonosky, Victoria C.
Smith, Cathy
Tinz, Birger
Trewin, Blair
Valente, Maria Antonia
Wang, Xiaolan L.
Wilkinson, Clive
Wood, Kevin
Wyszynski, Przemyslaw
Publisher NSF National Center for Atmospheric Research
Publication Date 2019-05-15
Digital Object Identifier (DOI) https://doi.org/10.5065/H93G-WS83
Alternate Identifier d131003
Resource Version N/A
Topic Category climatologyMeteorologyAtmosphere
Progress completed
Metadata Date 2025-10-09T01:18:52Z
Metadata Record Identifier edu.ucar.gdex::d131003
Metadata Language eng; USA
Suggested Citation Slivinski, Laura C., Compo, Gilbert P., Whitaker, Jeffrey S., Sardeshmukh, Prashant D., Giese, Benjamin S., McColl, Chesley, Brohan, Phillip, Allan, Rob, Yin, Xungang, Vose, Russell, Titchner, Holly, Kennedy, John, Spencer, Lawrence J., Ashcroft, Linden, Bronnimann, Stefan, Brunet, Manola, Camuffo, Dario, Cornes, Richard, Cram, Thomas A., Crouthamel, Richard, Dominguez-Castro, Fernando, Freeman, J. Eric, Gergis, Joelle, Hawkins, Ed, Jones, Philip D., Jourdain, Sylvie, Kaplan, Alexey, Kubota, Hisayuki, Blancq, Frank Le, Lee, Tsz-Cheung, Lorrey, Andrew, Luterbacher, Jurg, Maugeri, Maurizio, Mock, Cary J., Moore, Kent, Przybylak, Rajmund, Pudmenzky, Christa, Reason, Chris, Slonosky, Victoria C., Smith, Cathy, Tinz, Birger, Trewin, Blair, Valente, Maria Antonia, Wang, Xiaolan L., Wilkinson, Clive, Wood, Kevin, Wyszynski, Przemyslaw. (2019). NOAA-CIRES-DOE Twentieth Century Reanalysis Version 3. NSF National Center for Atmospheric Research. https://doi.org/10.5065/H93G-WS83. Accessed 09 October 2025.

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