Departure (anomaly) of global mean annual surface temperature from the average over the 1961–1990 reference period, from three datasets. The grey shading indicates the uncertainty in the dataset produced by the Met Office Hadley Centre and the Climatic Research Unit at the University of East Anglia, UK (HadCRU).
World Meteorological Organization, 2017. WMO Statement on the State of the Global Climate in 2016 (WMO-No. 1189), Fig. 1, p.5.