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城市树木在全球城市的表面冷却效应的模式和驱动因素
Jiarui Li1, Shasha Wang1, Wenfeng Zhan2
1Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Science, Nanjing University, Nanjing, Jiangsu 210023, China.
The Science of the total environment
|February 13, 2025
概括
城市树木在全球范围内冷却城市,平均冷却强度为1.67°C,距离136.86m. 树木属性,特别是NDVI,主要驱动这种冷却效应,由城市和气候因素调节.
科学领域:
- 城市生态学 城市生态学
- 环境科学环境科学
- 遥感是一种远程传感.
背景情况:
- 全球气温上升和城市热应激需要有效的缓解策略.
- 城市树木被认为具有降温潜力,但它们的空间影响和驱动因素尚未完全理解.
- 量化城市树木的冷却效应对于可持续城市规划至关重要.
研究的目的:
- 用冷却强度和距离量化全球城市树木的表面冷却效应.
- 研究树木属性,城市特征和背景气候对冷却效应的影响.
- 检查城市和气候环境对树木冷却调节的综合影响.
主要方法:
- 利用Landsat-8对1016个全球城市的陆地表面温度数据.
- 量化冷却强度 (°C) 和冷却距离 (m) 作为关键指标.
- 分析了小规模 (树木属性),中规模 (城市特征) 和大规模 (气候) 驱动因素的影响.
主要成果:
- 全球平均冷却强度:1.67 ± 1.13°C;平均冷却距离:136.86 ± 60.44m.
- 降温强度主要由树木属性 (88%) 驱动,特别是树木NDVI.
- 冷却距离主要受到树木属性 (73%) 的影响,树木面积是关键因素.
结论:
- 树木属性是城市树木冷却效应的主要调节者.
- 城市和气候环境共同调节树木属性对冷却的影响.
- 分散的树木覆盖可以在人口密或高温城市中有效,为城市绿化战略提供信息.
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