| Abstract | Climate change has led to prolonged, more frequent, intense, and severe extreme weather events, such as summertime heatwaves and thus, it is imperative to understand and evaluate the overheating conditions. This study evaluated a reference year selection method in terms of typical and extreme reference years based on future climate datasets to assess both outdoor overheating in the future. The future climate data were collected from the Coordinated Regional Downscaling Experiment (CORDEX) program. A Canadian city, Montreal, was selected for the overheating evaluation during three selected periods (2001–2020, 2041–2060, 2081–2100). This study demonstrates that the reference year selection method could reasonably capture both typical and the severest overheating conditions. In contrast, neither the severest nor the typical yearly outdoor and indoor overheating conditions could be predicted by the design summer year method. Finally, owing to the effects of climate change, the maximum and average yearly overheating hours increased by 1–2 times until the mid-term future (2041–2060) and by 2–4 times for the long-term future (2081–2100), as compared with the values for the contemporary term (2001–2020). |
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