School of Sustainability, Arizona State University, Tempe, AZ, USA.
School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, USA.
Nat Commun. 2023 Mar 16;14(1):1467. doi: 10.1038/s41467-023-36972-5.
Urban overheating is an increasing threat to people, infrastructure, and the environment. Common heat mitigation strategies, such as green infrastructure, confront space limitations in current car-centric cities. In 2020, the City of Phoenix, Arizona, piloted a "cool pavement" program using a solar reflective pavement seal on 58 km of residential streets. Comprehensive micrometeorological observations are used to evaluate the cooling potential of the reflective pavement based on three heat exposure metrics-surface, air, and mean radiant temperatures-across three residential reflective pavement-treated and untreated neighborhoods. In addition, the solar reflectivity of reflective pavement is observed over 7 months across eight residential neighborhoods. Results are synthesized with the literature to provide context-based reflective pavement implementation guidelines to mitigate urban overheating where common strategies cannot be applied. The three most important contextual factors to consider for effective implementation include urban location, background climate type, and heat exposure metric of interest.
城市热岛效应是对人类、基础设施和环境的日益威胁。常见的热缓解策略，如绿色基础设施，在当前以汽车为中心的城市中面临空间限制。2020 年，亚利桑那州凤凰城市在 58 公里的居民区街道上试点了一项“凉爽路面”计划，使用太阳能反射路面密封剂。综合微气象观测用于根据三个热暴露指标（表面、空气和平均辐射温度），在三个居民区的反射路面处理和未处理的街区，评估反射路面的冷却潜力。此外，在 8 个居民区进行了 7 个月的反射路面太阳能反射率观测。结果与文献相结合，为缓解常见策略无法应用的城市热岛效应提供了基于背景的反射路面实施指南。有效实施需要考虑的三个最重要的背景因素包括城市位置、背景气候类型和感兴趣的热暴露指标。
