The Global Surface Temperature Anomaly gives the global anomaly either for each year, or for each month.
It is based on the GHCN dataset
|Author||National Oceanic and Atmospheric Administration, National Climatic Data Center|
|Maintainer||Maintainer not given|
NOAA Global Surface Temperature Anomaly Index. National Oceanic and Atmospheric Administration, National Climatic Data Center.
Retrieved 13:53, May 18, 2013 (UTC).
the Data Hub