Institute of Space and Earth Information Science, Fok Ying Tung Remote Sensing Science Building, The Chinese University of Hong Kong, Hong Kong SAR, China.
Institute of Space and Earth Information Science, Fok Ying Tung Remote Sensing Science Building, The Chinese University of Hong Kong, Hong Kong SAR, China; Department of Geography and Resource Management, Wong Foo Yuan Building, The Chinese University of Hong Kong, Hong Kong SAR, China; Institute of Future Cities, Wong Foo Yuan Building, The Chinese University of Hong Kong, Hong Kong SAR, China.
Health Place. 2024 Mar;86:103213. doi: 10.1016/j.healthplace.2024.103213. Epub 2024 Mar 5.
Previous research on the relationship between greenspace exposure and mental health has largely taken a residence-based approach to exposure assessment, ignoring the dynamic nature of people's daily movements. Moreover, most studies evaluated greenspace from an overhead perspective, whereas an eye-level perspective could potentially offer a more comprehensive understanding of individuals' encounters with greenspaces. Based on our survey in two communities in Hong Kong (Sham Shui Po and Tin Shui Wai), we captured people's eye-level greenspace exposure based on their travel routes and visited places using GPS trajectories, streetscape images, and deep learning methods. We then compared the results with those obtained with an overhead greenness exposure measure (the normalized difference vegetation index [NDVI]). The results indicate that these two greenspace measurements are not associated with each other, implying that they encompass distinct facets of greenspace, which may have different effects on mental health. Further, we examined the associations between various greenspace exposure measures and mental health using GPS trajectories and ecological momentary assessment data. The results reveal a negative association between eye-level greenspace exposure and momentary stress, while no similar association was observed when using the top-down NDVI as an indicator of greenspace exposure. Moreover, compared to the total volume of greenspace exposure, the distance-weighted average of greenspace exposure based on dynamic mobility contexts has a stronger association with individual overall mental health. Lastly, the relationship between greenspace exposure and mental health varies between the two communities with different socio-economic attributes. The study indicates that policymakers should focus not only on residential neighborhoods and overhead greenspace but also consider the dynamic environments and socio-economic contexts that people are embedded in.
先前有关绿地暴露与心理健康之间关系的研究大多采用基于居住环境的暴露评估方法，忽略了人们日常活动的动态性质。此外，大多数研究从俯视的角度评估绿地，而从平视的角度可能提供对个体与绿地相遇的更全面理解。基于我们在香港两个社区（深水埗和天水围）的调查，我们根据人们的出行路线和访问地点，使用 GPS 轨迹、街景图像和深度学习方法，捕捉他们的平视绿地暴露情况。然后，我们将结果与基于俯视的绿化暴露测量（归一化差异植被指数 [NDVI]）的结果进行了比较。结果表明，这两种绿地测量方法彼此不相关，这表明它们包含了绿地的不同方面，可能对心理健康有不同的影响。此外，我们使用 GPS 轨迹和生态瞬时评估数据，研究了各种绿地暴露测量方法与心理健康之间的关系。结果表明，平视绿地暴露与瞬间压力呈负相关，而使用自上而下的 NDVI 作为绿地暴露指标时则没有观察到类似的关联。此外，与总绿地暴露量相比，基于动态流动背景的绿地加权平均暴露量与个体整体心理健康的相关性更强。最后，绿地暴露与心理健康之间的关系在具有不同社会经济特征的两个社区之间存在差异。研究表明，政策制定者不仅应关注居住社区和俯视绿地，还应考虑人们所处的动态环境和社会经济背景。
