NCEP/DOE Reanalysis 2 (R2)

This dataset contains products from the NCEP/DOE Reanalysis 2 (R2) Project. The resolution of the R2 model is the same as NCEP/NCAR Reanalysis (R1) project, T62 Gaussian grids with 28 vertical sigma levels. The output fields are saved 4 times a day as in R1. The main objective of the R2 project is to correct known errors in the R1 project and update the parameterizations of the physical processes. Improvements are seen in surface flux fields, hydrological budget, short wave radiation flux, etc. There are also drawbacks found in the outgoing longwave radiation over tropical warm pool and upper-level tropical moisture. R2 plans to reanalyze the data starting from 1979 and going forward only.

The main R2 products archived at NCAR consitute of 6 subgroups: pressure level analysis, sigma level analysis, flux term analysis, diagnostic analysis and 6-hour forecasts of flux term and diagnostic terms. All data files are in GRIB format and archived by month.

This dataset is updated once a month. Limited amount of recent data are also available at NCEP (https://ftp.cpc.ncep.noaa.gov/wd51we/reanalysis-2/). Earth System Research Laboratory's Physical Sciences Division of NOAA has the same data in netCDF format at https://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis2.html [https://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis2.html].

To Access Resource:

Questions? Email Resource Support Contact:

  • Chi-Fan Shih
    chifan@ucar.edu
    NSF NCAR - Geoscience Data Exchange

Temporal Range

  • Begin:  1979-01-01T00:00:00Z
    End:  2025-09-01T18:00:00Z

Keywords

Resource Type dataset
Temporal Range Begin 1979-01-01T00:00:00Z
Temporal Range End 2025-09-01T18:00:00Z
Temporal Resolution N/A
Bounding Box North Lat 90
Bounding Box South Lat -90
Bounding Box West Long -180
Bounding Box East Long 180
Spatial Representation grid
Spatial Resolution 1.875 degree
2.5 degree
Related Links

Related Resource #1 : Description of the NCEP/DOE Reanalysis II at the NCAR Climate Data Guide

Related Resource #2 : NCEP's Reanalysis-II site including data issues, news, etc.
Additional Information N/A
Resource Format WMO_GRIB1
Standardized Resource Format GRIB
Asset Size 1188032 MB
Legal Constraints

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

Resource Support Name Chi-Fan Shih
Resource Support Email chifan@ucar.edu
Resource Support Organization NSF NCAR - Geoscience Data Exchange
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 National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce
Publisher NSF National Center for Atmospheric Research
Publication Date 2000-07-27
Digital Object Identifier (DOI) https://doi.org/10.5065/KVQZ-YJ93
Alternate Identifier d091000
Resource Version N/A
Topic Category climatologyMeteorologyAtmosphere
Progress completed
Metadata Date 2025-10-02T23:46:51Z
Metadata Record Identifier edu.ucar.gdex::d091000
Metadata Language eng; USA
Suggested Citation National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce. (2000). NCEP/DOE Reanalysis 2 (R2). NSF National Center for Atmospheric Research. https://doi.org/10.5065/KVQZ-YJ93. Accessed 04 October 2025.

Harvest Source