File:Anomalies relative to 1961–1990 baseline with +0.9 °C offset (unless indicated).webp

English: OML and GMSTs "a, OML and Berkeley land12 temperature anomalies with onset of extreme land-air temperature from about 1990 (pink shading). b, GMSTs from blended OML and land12 anomalies (this study dark red circles) and from blended HadSST4 and land temperatures12 (orange circles), the latter relative to IPCC 1850–1900 pre-industrial period, which underestimates global warming by ∼0.5 °C. See refs. 11,12,13 and Supplementary Data for uncertainties. c, OML and HadSST4 of >1.5 °C and land >2 °C temperature increases by 2020. d, GMST records for blended OML + land and blended HadSST4 + land with 1.5 °C passed during 2012–2015. At current rates of emissions 2 °C global warming will be reached by late 2020s. Historic evolution of atmospheric CO2 (solid line), future increases with present-day rates of emissions (dashed line) and 10% annual reductions from 2025 to halve emissions by early 2030 (dotted line)."