Under the framework of the Urban Innovative Actions program of the European Commission, in 2020, 11 primary schools in Barcelona were transformed into climate shelters by implementing green, blue, and grey measures. Schoolyards were also opened to the local community to be used during non-school periods. Here we present the study protocol of a mixed-method approach to evaluate the effectiveness of the interventions in terms of improving environmental quality and health for users. We evaluated school level through the following: (1) quantitative pre-post quasi-experimental study, and (2) qualitative evaluation. The quantitative study included measures of (a) environmental variables (collected via low-cost and non-low-cost sensors), (b) students’ health and well-being (collected via health questionnaires, attention levels test, and systematic observations), and (c) teachers’ health and well-being (collected via thermal comfort measurements and health questionnaires). The qualitative methods evaluated the perceptions about the effects of the interventions among students (using Photovoice) and teachers (through focus groups). The impact of the interventions was assessed at community level during summer non-school periods through a spontaneous ethnographic approach. Data collection started in August 2019 and ended in July 2022. The evaluation provides the opportunity to identify those solutions that worked and those that need to be improved for future experiences, as well as improve the evaluation methodology and replication for these kinds of interventions.

在欧盟委员会城市创新行动计划框架下，2020年，巴塞罗那11所小学通过实施绿、蓝、灰措施，被改造为气候庇护所。校园也向当地社区开放，供非上学期间使用。在这里，我们提出了混合方法的研究方案，以评估干预措施在改善环境质量和用户健康方面的有效性。我们通过以下方式评估学校水平：（1）定量前后准实验研究，（2）定性评估。定量研究包括（a）环境变量（通过低成本和非低成本传感器收集），（b）学生的健康和福祉（通过健康问卷、注意力水平测试和系统观察收集）的测量，(c) 教师的健康和福祉（通过热舒适测量和健康调查问卷收集）。定性方法评估了学生（使用照片语音）和教师（通过焦点小组）对干预效果的看法。在夏季非上学期间，通过自发的人种学方法在社区层面评估了干预措施的影响。数据收集于 2019 年 8 月开始，于 2022 年 7 月结束。评估提供了确定那些有效的解决方案和需要改进的解决方案以适应未来经验的机会，并改进了此类干预措施的评估方法和复制。