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Restrictions | Details | Caveats | File Naming | Citation | References | Original Source | Contact

Jones (CRU) Air Temperature Anomalies Version 4: CRUTEM4

Brief Description:

  • Global gridded (5°x5°) monthly anomalies of observed air temperature and combined observed air and marine temperature (HADCRU4) from the mid 1800's to near present.Current version is V4.2.0 which was put out 5/9/2013. More Details...

Temporal Coverage:

  • Monthly anomalies and statistics from 1850/01 to near present.

Spatial Coverage:

  • 5.0 degree latitude x 5.0 degree longitude global grid (72x36).
  • 87.5S - 87.5N, 177.5W - 177.5E.

Levels:

  • Surface

Update Schedule:

  • Monthly

Download/Plot Data:

Archive parameters: File names are composed of variable abbreviations and statistic name:

(variable).(time).(statistic).nc

Variable Statistic Level Download File Create Plot/Subset
Air Temperature Anomaly Surface air.mon.anom.nc plot
Air Temperature NOBS Surface air.mon.anom.nobs.nc plot
Air Temperature Sampling Error Surface air.mon.anom.samplingerror.nc plot
Air Temperature Station Error Surface air.mon.anom.stationerror.nc plot
Air Temperature 2.5 bias Surface air.mon.anom.biased2.5.nc plot
Air Temperature 97.5 bias Surface air.mon.anom.biased97.5.nc plot
Air Temperature: Variance adjusted Anomaly Surface air.mon.anom.nc plot
Air temperature (from Hadcrut2!) monthly long term mean Surface air.mon.ltm.nc plot

Usage Restrictions:

    None

Detailed Description:

Caveats:

  • None

Related File Naming & Structure Information:

File Names:

  • var.time.stat.nc   (In directory: /Datasets/cru/crutem4/std/)
  • var.time.stat.nc   (In directory: /Datasets/cru/crutem4/var/)

Dataset Format and Size:

  • PSD standard NetCDF ~20 Mbytes file for each monthly file.
  • PSD standard NetCDF .13 Mbytes file the monthly ltm file.

Missing Data:

  • -9.96921e+36f.

Citation:

  • Jones, P.D., Lister, D.H., Osborn, T.J., Harpham, C., Salmon, M. and Morice, C.P., 2012: Hemispheric and large-scale land surface air temperature variations: an extensive revision and an update to 2010. Journal of Geophysical Research, doi:10.1029/2011JD017139.
  • Please note: If you acquire CRUTEM4 data products from PSD, we ask that you acknowledge us in your use of the data. This may be done by including text such as CRUTEM4 data provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site at http://www.esrl.noaa.gov/psd/ in any documents or publications using these data. We would also appreciate receiving a copy of the relevant publications. This will help PSD to justify keeping the CRUTEM4 data set freely available online in the future. Thank you!

References:

  • Jones, P.D., Lister, D.H., Osborn, T.J., Harpham, C., Salmon, M. and Morice, C.P., 2012: Hemispheric and large-scale land surface air temperature variations: an extensive revision and an update to 2010. Journal of Geophysical Research, doi:10.1029/2011JD017139.
  • Brohan, P., J.J. Kennedy, I. Harris, S.F.B. Tett and P.D. Jones, 2006: Uncertainty estimates in regional and global observed temperature changes: a new dataset from 1850. J. Geophysical Research 111, D12106, doi:10.1029/2005JD006548
  • Jones, P.D., Osborn, T.J., Briffa, K.R., Folland, C.K., Horton, B., Alexander, L.V., Parker, D.E. and Rayner, N.A., 2001: Adjusting for sampling density in grid-box land and ocean surface temperature time series. J. Geophys. Res. 106, 3371-3380.

Original Source:

Contact:

  • Physical Sciences Division: Data Management
    NOAA/ESRL/PSD
    325 Broadway
    Boulder, CO 80305-3328
    esrl.psd.data@noaa.gov