Figure 4.
The image features four plots organized in two columns and two rows, presenting data from 1980 to 2020. Each plot has axes labelled for 'Period' on the horizontal axis and a vertical axis indicating numerical values ranging from zero to one. The plots contain a colour gradient that transitions from blue to red, showing variations in the data across the period. The plots are connected to black contour lines outlining specific value thresholds. Each plot is titled, indicating the type of data represented, such as PWC and MWC for different categories. The overall layout allows for easy comparison of the data trends across different conditions.(Continued)