Fig. 5
Response of global mean surface temperature (GMST, °C) to emissions of CO2, CH4 and N2O during 1851–2021, shown globally and for selected regions. The GMST response to historical CH4 emissions began to fall in some developed regions towards the end of the 20th Century due to a decline in CH4 emissions versus prior decades (see Fig. 3). The temperature response is calculated by multiplying the transient response to cumulative emissions of CO2 (TCRE) by the total emissions of CO2, CH4 and N2O expressed in Pg CO2-e100. Emissions of CH4 and N2O are converted to units Pg CO2-e100 using the GWP* approach38. The ISO3 codes of countries in the legend are: CHN, China; RUS, Russia; BRA, Brazil; IND, India; IDN, Indonesia. All data shown are provided in the Data Records44.
