Fig. 6: Annual trends in heatwave metrics for AHWs and LHWs under future emission scenarios (Shared Socio-economic Pathway (SSP): SSP126, SSP370, SSP585), calculated with a fixed 2000–2022 baseline.
From: Lakes are experiencing more severe heatwaves than the atmosphere

The left panel depicts the AHW trends, and the right panel shows the corresponding LHW trends. Hist conditions (2000–2022) are shown as a black line; SSP126, SSP370, and SSP585 for 2023–2100 are shown as green, blue, and red lines, respectively. Shading denotes the 25–75th percentile range. From top to bottom, the metrics are a, b accumulated heatwave days, c, d mean intensity, e, f reoccurrence period, g, h CHI, i,j CHIP, and k, l heatwave frequency.