Fig. 4: Few regions show significant heatwave change on top of the mean temperature increase.

Shadings show the multi-model-mean change in heatwave frequency when mean temperature increase is removed, in SSP585 (2060–2099) minus historical (1966–2005). Dots enclosed in grey contours denote regions where the changes are NOT statistically significant. Europe and Greenland (land points in green boxes) are studied in more detail.