Figure 6.
Two time-series line graphs illustrate performance ratio anomalies, P R anomalies, plotted against date and hour in U T C. Graph a corresponds to a heatwave event occurring in mid to late August 2024, while graph b corresponds to a heatwave event in late May to early June 2025. The continuous line represents temporal variations in P R anomalies, with the horizontal zero line indicating normal performance conditions. The shaded region denotes the duration of the heatwave. Diamond markers identify the trough points associated with the most severe negative anomalies, while square markers indicate recovery points where the P R returns to approximately ninety percent of its reference level. The graphs demonstrate pronounced performance degradation during heatwave conditions followed by partial or complete recovery after the heatwave period.Performance ratio anomalies during and post-heatwave for Zebro. (a) 1P; (b) 2P
Source: Authors’ own work