Go To: Temporal Coverage | Spatial Coverage | Levels | Update Schedule | Download/Plot Data | Restrictions | Details | Caveats | File Naming | Citation | References | Original Source | Contact

Jones (CRU) Air Temperature Amomalies: CRUTEM2

This dataset (V2) is now superseded by V3 which will soon be available

One-Line Description:

  • Jones Climate Research Unit (CRU) Air Temperature Amomalies: CRUTEM2

Temporal Coverage:

  • Monthly anomalies from 1851/01 to present

Spatial Coverage:

  • 5.0 degree latitude x 5.0 degree longitude global grid (72x36)
  • 87.5S - 87.5N , 2.5E - 357.5E

Levels:

  • Surface

Update Schedule:

  • Monthly

Download/Plot Data:

Variable Statistic Level Download File Create Plot/Subset
Air temperature anomalies monthly anomaly ' ' air.mon.anom.nc plot
Air temperature anomalies:variance corrected monthly anomaly ' ' air.mon.anom.nc plot

Usage Restrictions:

  • None

Detailed Description:

  • See the Climate Research Unit (CRU) webpage 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. The air temperature data is from monthly station temperature time series. A version that is variance corrected (CRUTEM2V) is available. The technique for the variance adjusted dataset can be found at Jone et. al (2001).

  • Related Dataset:

Caveats:

  • None

Related File Naming & Structure Information:

File Names:

  • var.time.stat.nc   (In directories: /Datasets/cru/crutem2 and /Datasets/cru/hadcrut2 )

Dataset Format and Size:

  • PSD standard NetCDF 18.6 Mbyte file for each monthly file (packed).
  • PSD standard NetCDF .6 Mbyte file for each long term mean file (packed).

Missing Data:

  • Missing data is flagged with a value of -9.96921e+36f.

Citation:

  • Please note: If you acquire CRUTEM2 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 CRUTEM2 data provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site at http://www.cdc.noaa.gov/ 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 CRUTEM2 data set freely available online in the future. Thank you!

References:

  • 1994, Journal of Climate: Vol. 7, No. 11, pp. 1794-1802. Hemispheric Surface Air Temperature Variations: A Reanalysis and an Update to 1993 P.D. Jones
  • Folland, C.K., Karl, T.R., Christy, J.R., Clarke, R.A., Gruza, G.V., Jouzel, J., Mann, M.E., Oerlemans, J., Salinger, M.J. and Wang, S.-W., 2001b: Observed Climate Variability and Change. pp. 99-181 In: Climate Change 2001: The Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change (Houghton, J.T., Ding, Y., Griggs, D.J., Noguer, M., van der Linden, P.J., Dai, X., Maskell, K. and Johnson, C.A. Eds.). Cambridge University Press, Cambridge, UK, 881pp.
  • Jones, P.D., Osborn, T.J. and Briffa, K.R., 1997: Estimating sampling errors in large-scale temperature averages. J. Climate 10, 2548-2568.

Original Source:

Contact:

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