Historical data 1855-now and reconstructed changes of average global temperatures over previous centuries. Data originally part of Figure SPM-1 of IPCC (2021), downloaded from the IPCC website and used under Creative Commons Attribution 4.0 International License from the following CEDA catalogue page: http://creativecommons.org/licenses/by/4.0/ and http://catalogue.ceda.ac.uk/uuid/76cad0b4f6f141ada1c44a4ce9e7d4bd (Note: the downloaded data plotted here are slighted smoothed compared to the data of Figure SPM-1)