Yang Liu, Li Qi, Li Qiong, Zhao Lei, Luo Zhiwen, Liu Yan
State Key Laboratory of Green Building, Department of Architecture, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, P.R. China.
State Key Laboratory of Subtropical Building and Urban Science, School of Architecture, South China University of Technology, Guangzhou 510640, P.R. China.
iScience. 2024 Jan 11;27(3):108863. doi: 10.1016/j.isci.2024.108863. eCollection 2024 Mar 15.
The background climatic conditions and urban morphology greatly influence urban heat island effects (UHIs), but one-size-fits-all solutions are frequently employed to mitigate UHIs. Here, attribution models for surface UHIs (SUHIs) and canopy UHIs (CUHIs) were developed to describe UHI formation. The contribution of factors to SUHIs and CUHIs shows similar dependencies on background climate and urban morphology. Furthermore, the factors that mainly contributed to CUHIs were more complex, and anthropogenic heat was the more critical factor. Influence from urban morphology also highlights that there is no one-size-fit-all solution for heat mitigation at the neighborhood. In particular, maintaining a low building density should be prioritized, especially mitigating CUHIs. Moreover, it is more effective to prioritize urban irrigation maintenance over increasing green cover in arid regions but the opposite in humid regions. The work can provide scientific evidence to support developing general and regional guidelines for urban heat mitigation.
背景气候条件和城市形态对城市热岛效应（UHIs）有很大影响，但人们经常采用一刀切的解决方案来减轻城市热岛效应。在此，开发了地表城市热岛效应（SUHIs）和冠层城市热岛效应（CUHIs）的归因模型来描述城市热岛效应的形成。各因素对地表城市热岛效应和冠层城市热岛效应的贡献对背景气候和城市形态表现出相似的依赖性。此外，对冠层城市热岛效应起主要作用的因素更为复杂，人为热是更关键的因素。城市形态的影响还突出表明，在社区层面不存在一刀切的热缓解解决方案。特别是，应优先保持低建筑密度，尤其是减轻冠层城市热岛效应。此外，在干旱地区优先进行城市灌溉维护比增加绿化覆盖更有效，但在潮湿地区则相反。这项工作可为制定城市热缓解的通用和区域指南提供科学依据。
