Restrictions | Details | Caveats | File Naming | Citation | References | Original Source | Contact
Jones (CRU) Air Temperature Anomalies Version 4: CRUTEM4
Note, data has been converted from netCDF3 to netCDF4 classic.See our netCDF4 help page for more information.
Brief Description:
Temporal Coverage:
Spatial Coverage:
|
 |
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 |  |
| Air Temperature | NOBS | Surface | air.mon.anom.nobs.nc | |
| Air Temperature | Sampling Error | Surface | air.mon.anom.samplingerror.nc | |
| Air Temperature | Station Error | Surface | air.mon.anom.stationerror.nc | |
| Air Temperature | 2.5 bias | Surface | air.mon.anom.biased2.5.nc | |
| Air Temperature | 97.5 bias | Surface | air.mon.anom.biased97.5.nc | |
| Air Temperature: Variance adjusted | Anomaly | Surface | air.mon.anom.nc | |
| Air temperature (from Hadcrut2!) | monthly long term mean | Surface | air.mon.ltm.nc | |
Usage Restrictions:
-
None
Detailed Description:
-
See the Hadley Centre for more details. This version is 4.1.1. The
air temperature page is from monthly station temperature time series. A version that is variance corrected
(CRUTEM4V) is available.
The technique for the variance adjusted dataset can be found at Jones et. al (2001).
Note the companion dataset HADCRUT4 Combined Air Temperature/SST Anomalies. Also note that if you would like a climatology, there is a 1961-1990 LTM file based on the HADCRUT2V data. - Related Datasets
- MLOST (NOAA Air Temperature Anomalies)
- GISTEMP (NASA Air Temperature Anomalies)
- HADCRUT3 (Combined Air/Marine Temperature Anomalies)
- CRUTEM3 (Combined Air Temperature Anomalies) (depreciated)
- NCEP/NCAR Reanalysis (surface air temperature)
- NCEP Operational Analysis (surface temperature)
- U Delaware (air temperature)
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:
- CRU http://www.cru.uea.ac.uk/cru/data/temperature/ (created dataset).
- Hadley Centre: http://hadobs.metoffice.com/crutem4/ (archive of dataset).
Contact:
-
Physical Sciences Division: Data Management
NOAA/ESRL/PSD
325 Broadway
Boulder, CO 80305-3328
esrl.psd.data@noaa.gov