分析西安城市热岛效应的空间异质性,使用多来源数据的融合数据
Yuan Meng1,2, Qian Luo1, Boyu Bai1
1School of Architecture, Chang'an University, Xi'an, Shaanxi, China.
PloS one
|October 17, 2025
概括
这项研究显示,建筑密度和绿色景观指数显著影响西安的城市热岛 (UHI) 强度. 空间多样化的策略对于城市热弹性至关重要.
科学领域:
- 环境科学 环境科学
- 城市规划 城市规划
- 遥感 遥感 遥感 遥感
背景情况:
- 全球气候变化加剧了城市热岛效应 (UHI).
- 了解UHI的空间异质性对于城市适应至关重要.
研究的目的:
- 调查西安第二环路内的UHI的空间异质性和驱动机制.
- 开发一个新的多源数据融合框架用于UHI分析.
主要方法:
- 集成的高分辨率遥感,建筑数据和街景图像.
- 采用多尺度地理加权回归 (MGWR) 和机器学习模型 (随机森林,XGBoost,梯度增强回归).
- 提取了七个关键的环境特征和土地表面温度 (LST) 数据.
主要成果:
- 建筑密度 (BD),绿色景观指数 (GVI) 和道路密度 (RD) 是主要的LST驱动因素.
- BD与LST有积极的相关性,特别是在人口密集的地区 (SHAP值0.665在XGBoost).
- GVI显示负相关性,表明降温潜力;MGWR显示了BD和GVI的显著局部变异.
结论:
- 细粒度的环境指标有效地代表了UHI机制.
- 空间差异化的气候适应策略是城市热弹性所必需的.
- 综合框架为微气候调节政策提供了精细的工具.
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