2010 now listed as world's hottest year
Researchers have updated HadCRUT - one of the main global temperate records, which dates back to 1850.
One of the main changes is the inclusion of more data from the Arctic region, which has experienced one of the greatest levels of warming.
The amendments do not change the long-term trend, but the data now lists 2010, rather than 1998, as the warmest year on record.
The update is reported in the published in the Journal of Geophysical Research.
HadCRUT is compiled by the UK Met Office's Hadley Centre and the Climatic Research Unit (Cru) at the University of East Anglia, and is one of three global records used extensively by climatologists.
The other two are produced by US-based researchers at Nasa and the National Oceanic and Atmospheric Administration (Noaa).