土地表面和空气温度动态:城市形式和季节性的作用
Marzie Naserikia1, Melissa A Hart1, Negin Nazarian2
1Australian Research Council Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, Australia.
The Science of the total environment
|September 24, 2023
概括
土地表面温度 (LST) 和空气温度 (Ta) 在城市地区有很大的差异,LST显示出更大的变化. 仅仅依靠LST是不合适的理解城市热量,特别是在密集的地区.
科学领域:
- 城市气候学 城市气候学
- 遥感 遥感 遥感 遥感
- 环境科学 环境科学
背景情况:
- 城市热量研究通常使用卫星衍生的陆地表面温度 (LST),因为空气温度 (Ta) 观测有限.
- 缺乏对LST-Ta差异及其在城市环境中的控制因素的定量理解.
- 城市的形式和结构显著影响近地表面的热环境.
研究的目的:
- 探索城市形状和结构对土地表面温度 (LST) 和空气温度 (Ta) 之间的相互作用的影响.
- 在澳大利亚悉尼调查LST-Ta差异的时空特征和控制因素.
- 评估LST作为城市热环境的代理的适用性.
主要方法:
- 利用众包空气温度测量和高分辨率卫星衍生的陆地表面温度 (LST) 数据.
- 综合城市景观数据,包括当地气候区 (LCZ) 和建筑形态.
- 采用机器学习技术来分析LST,Ta和城市特征之间的关系.
主要成果:
- LST和Ta表现出不同的时空模式,LST显示出更大的季节性和城市内变化,特别是在温暖的季节.
- 与自然局部气候区 (LCZs) 相比,LST和Ta之间的温度差异在建筑环境中更为明显.
- 高建筑密度的建筑区域在夏季显示LST-Ta关系微不足道或负,表明LST是一个不合适的代理.
结论:
- LST和Ta之间的关系受季节,生态基础设施和建筑形态的影响.
- 仅仅依靠LST是不合适的城市热环境的特征,特别是在密集的城市地区在温暖的季节.
- 这些发现为地表空气温度动态及其与城市形状和结构的关系提供了新的见解.
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