ABSTRACT

Although green roofs are considered as a no-regret adaptation measure that helps to address various impacts of climate change, they are still rather rare. This paper explores three major European cities that have policies in place that are supposed to facilitate the installation of green roofs. We ask what approaches were chosen by local authorities to promote green roofs and which factors facilitated their implementation. Our analysis is based on implementation literature in general as well as adaptation policy literature in particular. It combines literature reviews and eleven interviews with policymakers and other stakeholders. The study reveals that immediate threats and particular events (e.g., urban heat islands or floods), an overall social and political environment favoring green solutions, so-called change agents, and a supportive framing determine if green roofs are considered as an attractive solution. However, even when multiple benefits of green roofs are beyond doubt, local governments largely prefer fiscal incentives over mandatory policies.

摘要

尽管绿色屋顶被认为是一种无悔的适应措施，有助于应对气候变化的各种影响，但它们仍然很少见。本文探讨了三个主要的欧洲城市，这些城市制定了旨在促进屋顶绿化安装的政策。我们询问地方当局选择了哪些方法来促进屋顶绿化，以及哪些因素促进了它们的实施。我们的分析一般基于实施文献，特别是适应政策文献。它结合了文献综述和对政策制定者和其他利益相关者的 11 次采访。该研究表明，直接威胁和特定事件（例如，城市热岛或洪水）、有利于绿色解决方案的整体社会和政治环境，即所谓的变革推动者，和支撑框架决定了绿色屋顶是否被认为是一个有吸引力的解决方案。然而，即使屋顶绿化的多重好处毋庸置疑，地方政府在很大程度上更倾向于财政激励而不是强制性政策。