– 1.20°C) higher in the decade 2011 – 2020 than in 1850 – 1900. This is a key finding reported in the IPCC AR6 Working Group I summary for policymakers, quantifying the observed global warming relative to the pre-industrial period. - B. The global temperature increase is larger over the land [1.59°C highlighted in climate science, including the IPCC reports. Land surfaces warm faster than ocean surfaces due to differences in heat capacity, evaporation, and mixing. The values provided are consistent with the AR6 report for the 2011-2020 decade relative to 1850-1900.