NOAA CIRES Twentieth Century Global Reanalysis Version 1 (1908-1958)
| DOI: 10.5065/T4KG-4C39
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 the entire twentieth century, assimilating only surface observations of synoptic pressure, monthly sea surface temperature and sea ice distribution (Version 1 only includes the years 1908 to 1958). 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 files (1 file per parameter) or monthly synoptic files (all parameters included in each file).
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.
RELEASE POLICY: Please use the citations listed below (See Publications section below) in any submitted publications using this dataset.
Additionally, papers using the Twentieth Century Reanalysis Project dataset are requested to include the following text in their acknowledgements:
Support for the Twentieth Century Reanalysis Project dataset is provided by the U.S. Department of Energy, Office of Science Innovative and Novel Computational Impact on Theory and Experiment (DOE INCITE) program, and Office of Biological and Environmental Research (BER), and by the National Oceanic and Atmospheric Administration Climate Program Office.
|Air Temperature||Albedo||Cloud Frequency||Cloud Liquid Water/Ice|
|Convection||Evaporation||Geopotential Height||Gravity Wave|
|Heat Flux||Humidity||Ice Extent||Land Use/Land Cover Classification|
|Longwave Radiation||Maximum/Minimum Temperature||Planetary Boundary Layer Height||Potential Temperature|
|Precipitation Rate||Runoff||Sea Level Pressure||Sea Surface Temperature|
|Shortwave Radiation||Skin Temperature||Snow Water Equivalent||Soil Moisture/Water Content|
|Surface Pressure||Surface Winds||Total Precipitable Water||Tropopause|
|Tropospheric Ozone||Upper Air Temperature||Upper Level Winds||Vertical Wind Velocity/Speed|
NOAA ESRL 20th Century Reanalysis web page. Provides access to a NetCDF version of the data
NOAA ESRL 20th Century Reanalysis Home Page
Oak Ridge Leadership Computing Facility
NCAR Command Language GRIB to NetCDF file structure description
20th Century Reanalysis status mailing list (Reanalysis-20cr-notify)