Jones (CRU) Air Temperature Anomalies Version 3: CRUTEM3
One-Line Description:
- CRU3 gridded global air temperature
Temporal Coverage:
- Monthly anomalies and statistics from 1850/01 to present
Spatial Coverage:
- 5.0 degree latitude x 5.0 degree longitude global grid (72x36).
- 87.5S - 87.5N, -177.5E - 177.5E.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 |  |
| Air Temperature | NOBS | Surface | air.mon.nobs.nc |  |
| Air Temperature | Sampling Error | Surface | air.mon.samplingerror.nc | |
| Air Temperature | Station Error | Surface | air.mon.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:
- 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. The
air temperature page is from monthly station temperature time series. A version that is variance corrected
(CRUTEM3V) is available.
The technique for the variance adjusted dataset can be found at Jones et. al (2001).
Note the companion dataset HADCRUT3 Combined Air Temperature/SST Anomalies. Also note that if you would like a climatology, there is a 1961-1990 LTM file based on the HADCRUT3V data. - Related Datasets
- HADCRUT3 (Combined Air/Marine Temperature Anomalies)
- HADCRUT2 (Combined Air/Marine Temperature Anomalies) (depreciated)
- CRUTEM2 (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/crutem3/std/)
- var.time.stat.nc (In directory: /Datasets/cru/crutem3/var/)
Dataset Format and Size:
- PSD standard NetCDF ~20 Mbyte file for each monthly file.
- PSD standard NetCDF .12Mbytes file the monthly ltm file.
Missing Data:
- -9.96921e+36f.
Citation:
- Please note: If you acquire CRUTEM3 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 CRUTEM3 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 CRUTEM3 data set freely available online in the future. Thank you!
References:
- P. Brohan, J.J. Kennedy, I. Harris, S.F.B. Tett and P.D. Jones, Uncertainty estimates in regional and global observed temperature changes: a new dataset from 1850. J. Geophys. Research, 111, D12106, doi:10.1029/2005JD006548.
- Jones, P.D., T.J. Osborn, K.R. Briffa, C.K. Folland, E.B. Horton, L.V. Alexander, D.E. Parker, and N.A. Rayner, 2001. Adjusting for sampling density in grid box land and ocean surface temperature time series. Journal of Geophysical Research 106:3371-3380.
Original Source:
- Hadley Centre: http://hadobs.metoffice.com/crutem3/.
Contact:
- Physical Sciences Division: Data Management
NOAA/ESRL/PSD
325 Broadway
Boulder, CO 80305-3328
esrl.psd.data@noaa.gov