Multi-scale effects of LCZ and urban green infrastructure on diurnal land surface temperature dynamics

IF 10.5 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Sustainable Cities and Society Pub Date : 2024-11-07 DOI:10.1016/j.scs.2024.105945

Yuxin Yan, Wenchen Jian, Boya Wang, Zhicheng Liu

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引用次数: 0

Abstract

The impact of urban green infrastructure (UGI) on land surface temperature (LST) has been widely discussed as a strategy to improve urban thermal environments. However, most studies have focused primarily on daytime conditions. Due to the limitations of polar-orbiting satellites like the Landsat series, the influence of UGI on LST over a 24-hour cycle remains unclear. To assess the relative influence and interdependence of UGI characteristics on LST across four different grid scales over the diurnal cycle, this study, conducted within Beijing's Fifth Ring Road during the summer, utilized a random forest (RF) regression model. The results indicate that: (1) UGI's impact on LST follows two distinct patterns: daytime (morning and afternoon) and non-daytime (night and dawn), which indicates the intensity of sunlight as a key driving factor; (2) tree landscape pattern indices are the most significant factors affecting LST; (3) during non-daytime periods (night and dawn), cropland's cooling effect is equally important as that of trees. These findings are valuable for prioritizing and strategically placing different types of UGI in urban planning. However, as this study focuses on a specific area, future research should include comparative studies in cities with different climatic conditions.

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低碳区和城市绿色基础设施对昼夜地表温度动态的多尺度影响

作为改善城市热环境的一种策略，城市绿色基础设施（UGI）对地表温度（LST）的影响已被广泛讨论。不过，大多数研究主要集中在白天的情况。由于 Landsat 系列等极轨卫星的局限性，UGI 在 24 小时周期内对 LST 的影响仍不明确。为了评估昼夜周期内四个不同网格尺度的 UGI 特征对 LST 的相对影响和相互依存关系，本研究于夏季在北京五环路内进行，采用了随机森林（RF）回归模型。结果表明(1）UGI 对 LST 的影响有两种不同的模式：日间（上午和下午）和非日间（夜间和黎明），这表明日照强度是关键的驱动因素；（2）树木景观模式指数是影响 LST 的最重要因素；（3）在非日间时段（夜间和黎明），耕地的降温效应与树木的降温效应同等重要。这些研究结果对于在城市规划中确定不同类型城市温室气体排放的优先次序和战略布局非常有价值。不过，由于本研究侧重于特定地区，未来的研究应包括不同气候条件城市的比较研究。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sustainable Cities and Society Social Sciences-Geography, Planning and Development

CiteScore

22.00

自引率

13.70%

发文量

810

审稿时长

27 days

期刊介绍： Sustainable Cities and Society (SCS) is an international journal that focuses on fundamental and applied research to promote environmentally sustainable and socially resilient cities. The journal welcomes cross-cutting, multi-disciplinary research in various areas, including: 1. Smart cities and resilient environments; 2. Alternative/clean energy sources, energy distribution, distributed energy generation, and energy demand reduction/management; 3. Monitoring and improving air quality in built environment and cities (e.g., healthy built environment and air quality management); 4. Energy efficient, low/zero carbon, and green buildings/communities; 5. Climate change mitigation and adaptation in urban environments; 6. Green infrastructure and BMPs; 7. Environmental Footprint accounting and management; 8. Urban agriculture and forestry; 9. ICT, smart grid and intelligent infrastructure; 10. Urban design/planning, regulations, legislation, certification, economics, and policy; 11. Social aspects, impacts and resiliency of cities; 12. Behavior monitoring, analysis and change within urban communities; 13. Health monitoring and improvement; 14. Nexus issues related to sustainable cities and societies; 15. Smart city governance; 16. Decision Support Systems for trade-off and uncertainty analysis for improved management of cities and society; 17. Big data, machine learning, and artificial intelligence applications and case studies; 18. Critical infrastructure protection, including security, privacy, forensics, and reliability issues of cyber-physical systems. 19. Water footprint reduction and urban water distribution, harvesting, treatment, reuse and management; 20. Waste reduction and recycling; 21. Wastewater collection, treatment and recycling; 22. Smart, clean and healthy transportation systems and infrastructure;