Fig. 3: Percentage of May–September AHW-MHW concurrent days.
From: Mediterranean marine heatwaves intensify in the presence of concurrent atmospheric heatwaves

Regional distribution of AHW and MHW concurrent days from the total AHW (top panel) and MHW (bottom panel) days in the May-September period (from left to right) for 1940–2022 and three 29-year periods (1940–1969, 1966–1995 and 1993–2022). The percentage of concurrent days has progressively increased, especially in more recent decades.