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Jones (CRU) Air and Marine Temperature Anomalies: HADCRUT3

Brief Description:

  • Jones (CRU) Combined Air/Marine Temperature Anomalies (HADCRUT3 and HADCRUT3V)

Temporal Coverage:

  • Monthly anomalies from 1850/01 to 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).(statistics).nc

Variable Statistic Level Download File Create Plot/Subset
Air temperature anomalies monthly anomaly Surface air.mon.anom.nc plot
Air temperature anomalies:variance corrected monthly anomaly Surface air.mon.anom.nc plot
Air temperature Bias 97.5 monthly anomaly Surface air.mon.anom.biased97.5.nc plot
Air temperature Bias 2.5 monthly anomaly Surface air.mon.anom.biased2.5.nc plot
Air temperature Station Error monthly value Surface air.mon.anom.stationerror.nc plot
Air temperature M+S Error monthly total Surface air.mon.anom.mserror.nc plot
Air temperature (from Hadcrut2!) monthly long term mean Surface air.mon.ltm.nc plot

Usage Restrictions:

  • Please register at the Hadley Centre so that they can prove their datasets are widely used and so they can get funding.

Detailed Description:

  • See the Hadley Centre for more details. A climatology (1961-90) is provided which is based on the variance adjusted version HadCRUT2v as this has been corrected for changes in the numbers of stations/SST observations in the individual grid-box series (see Jones et al., 1999). This is the current IPCC global and hemispheric time series which is based on the methods in Folland et al. (2001a).The air temperature page is from monthly station temperature time series while the SST is from the HADSSTV2 SST analysis. A version that is variance corrected (HADCRUT3V) is available. The technique for the variance adjusted dataset can be found at Jones et. al (2001).

     

    Note the companion dataset CRUTEM3 Air Temperature Anomalies. Also note that if you would like a climatology, there is a 1961-1990 LTM file based on the HADCRUT2V data.
  • Related Datasets

Caveats:

  • None

Related File Naming & Structure Information:

File Names:

  • var.time.stat.nc   (In directory: /Datasets/cru/hadcrut3/std/)
  • var.time.stat.nc   (In directory: /Datasets/cru/hadcrut3/var/)

OpenDap File Names:

  • http://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/cru/hadcrut3/std/var.time.stat.nc   
  • http://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/cru/hadcrut3/var/var.time.stat.nc   

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.

Original Source:

Citation:

  • 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
  • Please note: If you acquire HADCRU3 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 HADCRU3 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 HADCRU3 data set freely available online in the future. Thank you!

References:

  • 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.
  • Jones, P.D., New, M., Parker, D.E., Martin, S. and Rigor, I.G., 1999: Surface air temperature and its variations over the last 150 years. Reviews of Geophysics 37, 173-199.

Contact:

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