基于当地气候区的季节性城市表面热环境分析:重庆的一个案例研究
Rongxiang Wang1, Tao Lu2, Bo He2
1Chongqing Planning & Design Institute, Chongqing 401147, China; Key Laboratory of Monitoring, Evaluation and Early Warning of Territorial Spatial Planning Implementation, Ministry of Natural Resources, Chongqing 401147, China; School of Geography and Tourism, Chongqing Key Laboratory of GIS Application, Chongqing Normal University, Chongqing 401331, China.
The Science of the total environment
|September 29, 2024
概括
城市化加剧了城市热岛效应. 这项研究绘制了重庆的当地气候区 (LCZ),揭示了土地覆盖面和季节变化如何影响地表温度,以改善城市规划.
科学领域:
- 城市气候学 城市气候学
- 环境科学环境科学
- 地理信息系统 (GIS) 是指地理信息系统.
背景情况:
- 快速城市化加剧了城市热岛 (UHI) 效应,对城市发展和公共卫生产生负面影响.
- 了解表面热环境的时空动态对于有效的减热策略至关重要.
研究的目的:
- 通过当地气候区 (LCZ) 框架,研究重庆市中心城市地区表面热环境的时空空间异质性.
- 为了确定这些热变化背后的驱动力,考虑到季节变化和不同的LCZ类型.
主要方法:
- 利用遥感,道路网络,土地使用,街景和建筑数据.
- 采用随机森林算法进行LCZ映射.
- 应用统计分析,包括等部门,环层和皮尔森相关性分析,以检查热变化和驱动机制.
主要成果:
- 重庆的城市地区以开放式建筑和植被LCZ为特征,建筑LCZ聚集在郊区,自然LCZ主要在郊区.
- 表面温度与表面覆盖密切相关,显示出明显的夏季热效应.
- 自然LCZ通常比建筑LCZ温度更低,在所有LCZ中观察到显著的季节性变化.
- 像绿色,高度和湿度这样的表面属性与温度相反相关,而亮度显示出正相关性.
结论:
- 城市热带测绘为了解城市热环境提供了有价值的框架.
- 表面覆盖,LCZ类型和季节性因素显著影响城市表面温度.
- 有针对性的城市规划,包括绿色基础设施和管理地表属性,可以减轻城市热岛效应.
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