Fig. 6: The frequency of 2021-like heatwaves and population exposure to heatwaves.
From: Increased impact of heat domes on 2021-like heat extremes in North America under global warming
a The heatwave frequency (unit: events) of ERA5 reanalysis (black) and CESM1 historical and RCP8.5 simulations (red) area-weighted averaged over Western North America (WNA). b Population exposure to heatwaves across the WNA through the 21st century in the integrated scenario: RCP8.5-SSP3 with rapid growth in greenhouse gas emissions and low growth in population (blue, unit: billion person-events), RCP8.5-SSP5 with rapid growth in greenhouse gas emissions and higher growth in population (purple). The 1.5 °C, 2 °C, and 3 °C global warming levels are reached in 2029, 2041, and 2060, respectively.
