주제범위 문헌고찰을 통한 자연기반해법의 증거 활용 방안 탐색: 옥상녹화 도시 열 완화 효과 연구를 중심으로

Green roofs have been extensively studied for their potential to mitigate urban heat, establishing them as a widely recognized nature-based solution (NbS) for addressing climate and environmental challenges in cities. However, despite these research efforts, limited attention has been given to how these findings should inform decision-making processes. The disconnect between policy-making and technology development often creates barriers that hinder cities from effectively implementing sustainable urban solutions. This study aims to bridge this gap by examining how existing knowledge on green roofs can be leveraged for decision-making. We conducted a scoping review following the PRISMA-ScR checklist, focusing on the heat mitigation effects of green roofs as a leading NbS technology. Using the 5W1H framework, we identified key decision-making questions and synthesized research evidence by categorizing research questions. To support decision-making, we explored how research evidence aligned with these questions. Through this process, we identified and proposed 10 key decision-making questions along with relevant supporting evidence. Our findings indicate that green roof research has primarily focused on analyzing the effects of different types and conditions of green roofs and quantifying their effectiveness in combination with other heat mitigation technologies. As a result, existing studies have addressed only a few policy decision-making questions. These findings highlight the need for more research that directly informs practical decision-making, emphasizing an integrated approach that combines technology development with policy research. Such an approach is essential for building generalized knowledge and actionable recommendations, such as guidelines and standards, to support decision-makers and practitioners in planning and implementing successful green roof projects.