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NOAA-CIRES Twentieth Century Global Reanalysis Version I (1908-1958)

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 I only includes the years 1908 to 1958). Products include 6-hourly ensemble mean and spread analysis fields on a 2x2 degree global lat/lon grid, and 3 and 6-hourly ensemble mean and spread forecast (first guess) fields on a global Gaussian T-62 grid. Fields are accessible in yearly time series files (1 file/parameter) or monthly synoptic files (all parameters included in each file).

Note: Version II of this reanalysis (running from 1891 - 2008) is now available. The is the recommended research version. Please see ds131.1 to access Version II.

More information is available.

PERIODS:

1908-01-01 00:00 +0000 to 1959-01-01 00:00 +0000 (Entire dataset)

Period details by subset

Period details by subset:
1908-01-01 00:00 +0000 to 1958-12-31 18:00 +0000 (Monthly Synoptic Analysis Fields (2x2 degree Lat/Lon))
1908-01-01 00:00 +0000 to 1959-01-01 00:00 +0000 (Monthly Synoptic First Guess Forecast Fields (Gaussian T-62))
1908-01-01 00:00 +0000 to 1958-12-31 18:00 +0000 (Yearly Time Series Analysis Fields (2x2 degree Lat/Lon))
1908-01-01 00:00 +0000 to 1959-01-01 00:00 +0000 (Yearly Time Series First Guess Forecast Fields (Gaussian T-62))

UPDATES:

irregularly

USAGE:

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 acknowledgments:

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.

VARIABLES:

Air Temperature	Albedo	Cloud Amount/Frequency	Cloud Liquid Water/Ice
Convection	Evaporation	Geopotential Height	Gravity Wave
Heat Flux	Humidity	Ice Extent	Land Cover
Longwave Radiation	Maximum/Minimum Temperature	Planetary Boundary Layer Height	Potential Temperature
Precipitable Water	Precipitation Rate	Runoff	Sea Level Pressure
Sea Surface Temperature	Shortwave Radiation	Skin Temperature	Snow Water Equivalent
Soil Moisture/Water Content	Surface Air Temperature	Surface Pressure	Surface Winds
Tropopause	Tropospheric Ozone	Upper Level Winds	Vertical Wind Motion

GRIB parameter table

LEVELS:

See the detailed metadata for level information

TYPES:

Grid

COVERAGE:

Longitude Range: Westernmost=180W Easternmost=180E
Latitude Range: Southernmost=90S Northernmost=90N

Detailed coverage information

Detailed coverage information:
1.875° x ~1.904° from 0E to 358.125E and 88.542N to 88.542S (192 x 94 Gaussian Longitude/Latitude)
2° x 2°, 0E to 358E and 90N to 90S (180 x 91 Longitude/Latitude) (Monthly Synoptic Analysis Fields (2x2 degree Lat/Lon))
1.875° x ~1.904° from 0E to 358.125E and 88.542N to 88.542S (192 x 94 Gaussian Longitude/Latitude) (Monthly Synoptic First Guess Forecast Fields (Gaussian T-62))
2° x 2°, 0E to 358E and 90N to 90S (180 x 91 Longitude/Latitude) (Yearly Time Series Analysis Fields (2x2 degree Lat/Lon))
1.875° x ~1.904° from 0E to 358.125E and 88.542N to 88.542S (192 x 94 Gaussian Longitude/Latitude) (Yearly Time Series First Guess Forecast Fields (Gaussian T-62))

SOURCES:

DOC/NOAA/ESRL

Earth System Research Laboratory, NOAA, U.S. Department of Commerce

PUBLICATIONS:

Compo, G.P., J.S. Whitaker, P.D. Sardeshmukh, N. Matsui, R.J. Allan, X. Yin,B.E. Gleason, R.S. Vose, G. Rutledge, P. Bessemoulin, S. Bronnimann, M. Brunet, R.I. Crouthamel, A.N. Grant, P.Y. Groisman, P.D. Jones, M. Kruk, A.C. Kruger, G.J. Marshall, M. Maugeri, H.Y. Mok, O. Nordli, T.F. Ross, R.M. Trigo, X.L. Wang, S.D. Woodruff, S.J. Worley, 2009: The Twentieth Century Reanalysis Project. Quarterly J. Roy. Met. Soc., Submitted.

G.P. Compo, J.S. Whitaker, and P.D. Sardeshmukh, 2008: The 20th Century Reanalysis Project. Proceedings of the Third WCRP International Conference on Reanalysis, 28 January - 1 February 2008, WCRP, The University of Tokyo Japan.

Compo,G.P., J.S. Whitaker, and P.D. Sardeshmukh, 2006: Feasibility of a 100 year reanalysis using only surface pressure data. Bull. Amer. Met. Soc., 87, 175-190.

Whitaker, J.S., G.P.Compo, X. Wei, and T.M. Hamill, 2004: Reanalysis without radiosondes using ensemble data assimilation. Mon. Wea. Rev., 132, 1190-1200.

Recommended acknowledgement for this dataset:
"The data for this study are from the Research Data Archive (RDA) which is maintained by the Computational and Information Systems Laboratory (CISL) at the National Center for Atmospheric Research (NCAR). NCAR is sponsored by the National Science Foundation (NSF). The original data are available from the RDA (http://dss.ucar.edu) in dataset number ds131.0."

VOLUME:

3657.53 GBytes (Entire dataset)

Volume details by subset

Volume details by subset:
Yearly Time Series Analysis Fields (2x2 degree Lat/Lon): 636.47 GBytes
Yearly Time Series First Guess Forecast Fields (Gaussian T-62): 294.03 GBytes
Monthly Synoptic Analysis Fields (2x2 degree Lat/Lon): 640.89 GBytes
Monthly Synoptic First Guess Forecast Fields (Gaussian T-62): 294.36 GBytes
Hxens files: 26.60 GBytes
Prepbufrobs_assim files: 9.86 GBytes
High priority data tarfiles: 1755.32 GBytes

DATA FORMATS:

WMO GRIB1

RELATED DATASETS:

ds090.0 - NCEP/NCAR Global Reanalysis Products, 1948-continuing
ds091.0 - NCEP/DOE Reanalysis II, 1979-2004
ds115.0 - ECMWF Re-analysis Level III-B Global Surface Analyses, 1979Jan-1993Dec
ds124.0 - ERA40 T85 6-hourly Surface Analysis and Surface Forecast Fields, created at NCAR
ds126.0 - ERA40 T85 Monthly Mean Surface Analysis and Surface Forecast Fields, created at NCAR
ds131.1 - NOAA-CIRES Twentieth Century Global Reanalysis Version II (1891-2008)
ds608.0 - NCEP North American Regional Reanalysis (NARR)
ds625.0 - Japanese 25-year Reanalysis Project
ds627.0 - ERA-Interim Project

MORE DETAILS:

View more details for this dataset, including dataset citation, data contributors, and other detailed metadata

CONTACT:

For assistance with this dataset, please contact Doug Schuster (303-497-1216) . If the specialist is unavailable, please contact Data Help.

DATA ACCESS:

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The Research Data Archive is managed by the Data Support Section of the Computational and Information Systems Laboratory at the National Center for Atmospheric Research in Boulder, Colorado.

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