在全球变暖的背景下,快速城市化导致城市建筑空间聚集,热岛效应日益严重,阻碍城市可持续发展。为了探讨不同类型社区绿化屋顶缓解城市热岛效应的潜力和方法,这项研究使用了地表温度反演和局部气候区(LCZ)的多元数据,结合LCZ分区和ENVI-met预测模型评价了绿色屋顶降低热岛效应的潜力。最后,进行了具有经济因素的多情景分析,以得出绿色屋顶的最佳实施路径。结果表明,在LCZ1-9中,绿色屋顶可以将LCZ8屋顶的0.5m和LCZ6行人的1.2m的白天平均气温降低最大0.41°C。根据LCZ绿色屋顶的表面冷却效率获得最佳绿色屋顶施工顺序:LCZ3、LCZ6、LCZ8>LCZ2、LCZ5、LCZ7>LCZ1、LCZ4、LCZ9。北京五环内热岛区建设绿色屋顶,可使高温和亚高温区面积减少52.55%和29.17%,分别,与没有绿色屋顶建设的地区相比。研究阐明了不同类型社区绿色屋顶降温效率和降低城市尺度热岛效应的技术方法体系,为城市建筑绿色屋顶的规划提供参考。
Against the backdrop of global warming, rapid urbanization has caused the aggregation of urban building spaces and the heat island effect is becoming increasingly serious, hindering sustainable urban development. In order to investigate the potential and methods of green roofs in different types of neighborhoods to mitigate the urban heat island effect, this study used multivariate data for surface temperature inversion and local climate zone (LCZ), and the potential of green roofs to reduce the heat island effect was evaluated by combining LCZ zoning and ENVI-met prediction model. Finally, a multi-scenario analysis with economic factors was conducted to derive the optimal implementation path for green roofs. The results show that in LCZs 1-9, the green roof can reduce the daytime average air temperature by a maximum of 0.41 °C for 0.5 m of the LCZ8 roof and 0.37 °C for 1.2 m of the LCZ6 pedestrian. Based on the surface cooling efficiency of LCZ green roofs get the best green roof construction order: LCZ3, LCZ6, LCZ8 > LCZ2, LCZ5, LCZ7 > LCZ1, LCZ4, LCZ9. The construction of green roofs for the heat island areas within the fifth ring road of Beijing can reduce the area of high-temperature and sub-high-temperature zones by 52.55% and 29.17%, respectively, compared with the area without green roof construction. The study clarifies the technical methodology system of cooling efficiency of green roofs in different types of neighborhoods and the reduction of the urban-scale heat island effect, which provides a reference for the planning of green roofs for urban buildings.