东莞市城市热环境时空变化及其驱动机制  

Temporal and spatial changes of urban thermal environment and driving mechanism in Dongguan City

作　　者：陈明辉[1,2] 陈颖彪[3] 郭冠华[3] 冯志新[3] 

机构地区：[1]中山大学地理科学与规划学院,广州510275 [2]东莞市地理信息与规划编制研究中心,东莞523129 [3]广州大学地理科学学院,广州510006

出　　处：《地理研究》2011年第8期1431-1438,共8页Geographical Research

基　　金：国家自然科学基金重点项目(40830532);住房和城乡建设部科学计划项目(2009-K9-2)

摘　　要：东莞市处于快速城市化进程中,基于19902005年Landsat TM/ETM＋反演地表温度,对地表温度数据进行归一化处理,分析东莞市热环境格局的时空变化特征,并引入建筑密度和交通干道对区域热环境格局的形成机制进行分析。研究表明：东莞市在近15年间城市热环境格局发生重大变化,随着城市建设用地的扩张,热岛由起初的分散点状分布向条状和带状分布演变。东莞市热格局的形成与发展与建筑密度密切相关,非城市用地的热岛强度为0.18℃,比郊区温度高0.18℃;热岛效应随离交通干道距离的增加而逐渐较弱。This paper takes Dongguan with rapid urbanization development as a typical example.It uses Landsat TM/ETM＋ remote sensing images as data sources to calculate the land surface temperature in the study area.After having the land surface temperature normalized we analyzed the spatial pattern changes of heat environment.What’s more,we introduced built-up density and main roads to explore the mechanism of heat environment spatial pattern and find the relationship between these factors and urban heat pattern.The results showed that the spatial pattern of urban thermal environment in Dongguan changed a lot in the past 15 years.With the expansion of urban areas,heat island changed from a diffuse heat spot to a strip or zonal shape.Relativity analysis showed that the urban heat spatial pattern in Donguang is closely related with built-up density.Urban heat effect became feeble as the distance far from the main roads.

关 键 词：热环境 时空变化 驱动力 东莞市 

分 类 号：X16[环境科学与工程—环境科学]