陈强,程倩豪,陈云浩,李康宁,靖常峰

• 1:北京建筑大学测绘与城市空间信息学院
• 2:北京师范大学地理科学学部

摘要(Abstract)：

针对城市热岛效应的各类影响因素,该文主要关注城市三维形态与城市热环境的关系,并研究这种关系因建筑高度、密度、季节而变化的原因。作为重要的城市结构参数,天空可视因子能够较好地描述建筑物的三维形态,并可以表征有效太阳辐射吸收强度。因此,该文结合建筑物高度数据集和半球模型计算天空可视因子,并利用Landsat-8热红外波段和辐射传输模型反演地表温度,然后分析了天空可视因子与地表温度在不同季节的相关性。选择地表异质性较高的北京核心建成区作为研究区,并按照不同建筑高度和密度选择4个实验区。实验结果表明,天空可视因子与地表温度的关系存在季节差异,冬季两者的相关性更强。通过对4个实验区的定量分析可知,实验区a中天空可视因子与地表温度夏季是正相关,冬季是非线性关系;实验区b和c中是两者的关系正相关;而实验区d中无明显相关趋势。所以,建筑物的高度与密度对天空可视因子与地表温度的关系有显著影响,并且这种关系随季节变化而不同。

关键词(KeyWords)： 天空可视因子;地表温度;城市三维表面;季节性变化

Abstract:

Keywords:

基金项目(Foundation): 北京市教委科研一般性项目(KM20190016006);; 国家自然科学基金项目(41801235,41771412)

作者(Author): 陈强,程倩豪,陈云浩,李康宁,靖常峰

DOI: 10.16251/j.cnki.1009-2307.2021.08.021

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