建筑环境对城市表面温度的影响,基于在中国西安市北林区社区层面的多来源数据
Dianyuan Zheng1, Xiaojun Huang2,3,4, Mingyue Qi5
1School of Public Affairs, Zhejiang University, Hangzhou, 310058, China.
Environmental science and pollution research international
|October 10, 2023
概括
城市化增加了土地表面温度 (LSTs),绿色空间降低了热量. 不透的表面和建筑密度显著影响了LST,突出了战略城市规划的必要性,以减轻热岛.
科学领域:
- 城市气候学 城市气候学
- 环境科学 环境科学
- 地理信息科学 地理信息科学
背景情况:
- 快速的城市化和全球变暖正在改变城市建筑环境,导致陆地表面温度 (LST) 的空间变化显著.
- 了解社区层面LST异质性的驱动因素对于制定有效的城市规划策略至关重要.
研究的目的:
- 在西安市贝林区社区层面分析LST的空间特征.
- 确定影响社区LST变化的关键驱动因素.
主要方法:
- 利用多源数据和空间统计方法进行分析.
- 采用探索性数据分析来选择基于AICc和调整后的R2.2的最佳模型 (No.1236).
- 包括诸如建筑密度 (BD),建筑高度标准偏差 (BHS),公共管理和公共服务土地 (PASL) 的百分比,绿地和广场土地 (PGSL) 的百分比,人口密度 (POPD),规范差异无透面积指数 (NDISI) 和周边面积分形维度 (PAFRAC) 等变量.
主要成果:
- 绿地和水体比例较高的社区与建筑用地占主导地位的社区相比,LST较低.
- 增加1个单位的NDISI与LST的0.569°C升高相关,而BHS的增加与0.578°C降低相关.
- NDISI,PAFRAC,BD和PASL被确定为主要的变暖因素,而BHS和PGSL则作为冷却因素.
结论:
- 社区LST空间异质性受到底层表面特性和城市内部建筑形态的影响.
- 战略城市规划,考虑诸如绿地分布和建筑特征等因素,对于减轻城市热岛效应至关重要.
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