Abstract Berlin currently experiences increasing environmental challenges especially through the combined effect of urbanization and climate change. The intensification of summer temperature extremes has become increasingly evident in recent years, urging the city to promote mitigation and adaptation measures for local heat load reduction. Green roofs have been widely recognized as an effective urban greening strategy to reduce heat stress in cities. This study thus analyses the effect of rooftop greening on outdoor thermal conditions in an inner-city prefabricated residential area in Berlin. The studied neighbourhood is one of the inner-city hot-spot areas of environmental loads, highlighting the need for green solutions. We quantified thermal effects of intensive green roof implementation using the ENVI-met model which, for the first time, has been applied at the city’s official planning scale. The study thereby aims at overcoming the mismatch between research scales and planning scales, facilitating the knowledge transfer between the science community and urban practitioners, particularly in land use planning. Results indicate that on a hot summer day, green roofs can significantly improve daytime thermal comfort at the roof level with an estimated decrease in physiological equivalent temperature (PET) by 9 K. Green roofs can thus provide spaces of qualitatively increased thermal comfort compared to street-level areas. Overall, our results highlight the effectiveness of rooftop greening in terms of heat adaptation at the neighbourhood level. Therefore, this study suggests that these greening systems should be emphasized in future effect-oriented and sustainable urban planning assessments, especially of inner-city prefabricated housing estates.

中文翻译：

---

德国柏林一个预制住宅区的屋顶绿化对白天热量的影响

摘要 柏林目前正面临日益严峻的环境挑战，尤其是城市化和气候变化的综合影响。近年来，夏季极端温度的加剧变得越来越明显，促使该市推动缓解和适应措施，以减少当地的热负荷。屋顶绿化已被广泛认为是减少城市热应激的有效城市绿化策略。因此，本研究分析了屋顶绿化对柏林市中心预制住宅区室外热条件的影响。所研究的社区是市中心环境负荷的热点地区之一，突出了对绿色解决方案的需求。我们使用 ENVI-met 模型量化了集约化屋顶绿化实施的热效应，这是第一次，已在城市官方规划规模上得到应用。因此，该研究旨在克服研究规模与规划规模之间的不匹配，促进科学界与城市实践者之间的知识转移，尤其是在土地利用规划方面。结果表明，在炎热的夏日，绿色屋顶可以显着提高屋顶水平的白天热舒适性，估计生理等效温度 (PET) 降低 9 K。因此，与街道相比，绿色屋顶可以提供质量更高的热舒适性空间级区域。总体而言，我们的结果突出了屋顶绿化在邻里热适应方面的有效性。所以，