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NCEP-DOE Reanalysis 2: Summary

Brief Description:

  • NCEP-DOE Reanalysis 2 is an improved version of the NCEP Reanalysis I model that fixed errors and updated paramterizations of physical processes.

Temporal Coverage:

  • 4-times, Daily and and monthly values for 1979/01 to 2021/12 .

Spatial Coverage:

  • Global Grids at varying resolutions


  • pressure level, sigma levels and single level files.17 pressure levels (hPa): 1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 70, 50, 30, 20, 10

Update Schedule:

  • Monthly

The NCEP-DOE Reanalysis 2 descriptions are subdivided into separate files

You can now search the NCEP-DOE Reanalysis 2 data by selecting one of these links:
  1. Search all of the NCEP-DOE Reanalysis 2 available at PSL.
  2. Search the NCEP/NCAR Reanalysis2 4x daily data available at PSL.
  3. Search the NCEP/NCAR Reanalysis2 daily average data available at PSL.

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.


  • Bad MSLP.

    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.


  • Please note: If you acquire NCEP_Reanalysis 2 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_Reanalysis 2 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_Reanalysis 2 data set freely available online in the future. Thank you!


Original Source:

  • NOAA National Centers for Environmental Predictions


  • Physical Sciences Laboratory: Data Management
    325 Broadway
    Boulder, CO 80305-3328