This article aims to examine the pathways of urban spatial forms in mitigating urban heat island (UHI) intensity across urban areas in different seasons. By investigating the case of Wuhan, we quantified urban spatial form (USF) factors concerning land use, land cover, and building-group morphology and the land surface temperatures (LST) in summer, autumn and winter of 2,357 block units. The seasonal relationships between USF and LST are explored at the large scale of the whole study area and different zones of block units categorized by floor area ratio. The results suggest that relationships between USF and LST vary spatially and temporally. First, although most urban spatial form factors show significant correlations on LST at the global scale, the correlations vary significantly among low, medium, and high floor-area-ratio zones. Second, USFs largely contribute to the variance of LST in summer and autumn compared with winter. Third, building morphology exerts more impact on LST in relatively highly intensive built-up zones, while land use and land cover factors have more impact in low-intensity areas. Lastly, UHI can be precisely mitigated by optimizing USFs considering the varied relationships between USFs and LST. This study theoretically deepens the understanding of the variation of the relationships between built-up urban areas and UHI at the scale of the basic planning regulation units, which is conducive to formulating down-to-earth regulation measures to cool cities and communities.

本文旨在研究城市空间形式在不同季节缓解城市地区城市热岛（UHI）强度的途径。通过对武汉的调查，我们量化了2357个街区单元的土地利用、土地覆盖、建筑群形态和夏季、秋季和冬季的地表温度（LST）等城市空间形态（USF）因素。USF 和 LST 之间的季节性关系在整个研究区域和按容积率分类的块单元的不同区域的大尺度上进行了探索。结果表明 USF 和 LST 之间的关系在空间和时间上都不同。首先，尽管大多数城市空间形态因素在全球范围内对 LST 显示出显着相关性，但低、中和高容积率区域之间的相关性差异很大。第二，与冬季相比，USF 在很大程度上促成了夏季和秋季 LST 的变化。第三，在相对密集的建成区，建筑形态对LST的影响更大，而土地利用和土地覆盖因素对低强度区的影响更大。最后，考虑到 USF 和 LST 之间的各种关系，可以通过优化 USF 来精确减轻 UHI。本研究从理论上加深了对基本规划调控单元尺度上建成区与城市居民健康指数关系变化的认识，有利于制定实实在在的城市和社区降温调控措施。而土地利用和土地覆盖因素对低强度地区的影响更大。最后，考虑到 USF 和 LST 之间的各种关系，可以通过优化 USF 来精确减轻 UHI。本研究从理论上加深了对基本规划调控单元尺度上建成区与城市居民健康指数关系变化的认识，有利于制定实实在在的城市和社区降温调控措施。而土地利用和土地覆盖因素对低强度地区的影响更大。最后，考虑到 USF 和 LST 之间的各种关系，可以通过优化 USF 来精确减轻 UHI。本研究从理论上加深了对基本规划调控单元尺度上建成区与城市居民健康指数关系变化的认识，有利于制定实实在在的城市和社区降温调控措施。