建成区扩张下的西安市热环境空间分异性

被引：18

作者：

祝新明

王旭红

周永芳

吴文恒

刘状

机构：

[1] 西北大学城市与环境学院

来源：

生态学杂志 | 2017年 / 36卷 / 12期

关键词：

建成区扩张; 热环境演变; 信息容量; 空间分异性; 西安;

D O I：

10.13292/j.1000-4890.201712.015

中图分类号：

X16 [环境气象学];

学科分类号：

0706 ; 070602 ;

摘要：

深入研究建成区扩张下的城市热环境的空间分异性,对于更好地认识城市热岛效应,改善城市生态环境具有重大意义。以西安市建成区为例,基于2005、2010及2016年3期Landsat遥感影像,采用线性光谱混合分析法提取建成区范围,利用热红外遥感影像反演地表温度来研究城市热环境的时空演变;在此基础上,基于城市热岛足迹与多维直方图的信息容量分析方法探究建成区扩张下城市热岛效应的影响范围变化及其空间分异性特征。结果表明:2005—2016年西安市建成区扩张强度剧烈,不透水性表面显著增加;城市建设加剧了西安市城市热岛强度和级别,致使高温区域增多并向外蔓延,逐渐呈现片状分布格局;西安市城市热岛足迹的空间分异性显著,从2005年至2016年城市热岛效应的影响足迹范围逐渐变小;信息容量能够反映城市扩张对城市热环境空间分异性的影响,研究期间西安市建成区内城市热岛空间分异性随着热岛强度增加变得更加复杂。

引用

页码：3574 / 3583

页数：10

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