1. How urban heat island magnifies hot day exposure: Global unevenness derived from differences in built landscape.
- Author
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Yu W, Yang J, Sun D, Ren J, Xue B, Sun W, Xiao X, Xia JC, and Li X
- Abstract
Urban heat-islands reportedly expose densely populated areas to higher temperatures. However, the magnitude of the impact of extra hot-day exposure (EHDE) and its association with the effects of urbanization on a global scale remain unclear. As local climate zones (LCZs) refine the impact of differences in urban built-type on heat-island effects, this study aimed to quantify the global EHDE caused by the urban heat-island effect based on LCZs and explored the joint impacts of low gross-domestic product and an increasing vulnerable-age population on EHDE. The results showed that EHDE accounted for 48.01 % of overall hot-day exposure. Additionally, despite a significant geographic differentiation among LCZ types with the highest EHDE intensity, they are almost typically building-intensive LCZs. Furthermore, our study revealed regional differences in the structure of the EHDE share in LCZs, which support the adoption of targeted EHDE mitigation strategies., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. This study is supported by the National Natural Science Foundation of China (grant no. 41771178, 42030409, and 41671151), and the Fundamental Research Funds for the Central Universities (grant no. N2411001)., (Copyright © 2024 Elsevier B.V. All rights reserved.)
- Published
- 2024
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