摘要
以快速城市化的典型区域广东省东莞市为例,以Landsat/TM、ETM+为主要数据源,采用单窗算法反演地表温度,提出多时相数据标准化处理方法,构建相对热效应指数、热贡献指数、冷贡献指数,定量研究城镇用地扩张对城市热环境的影响。结果表明:1990—2005年,东莞市城镇用地扩张迅猛,高温区由岛状向带状再向面状扩张。城镇用地的相对热效应指数先增大后减小,1990年为0.6,2000年为1.0,2005年为0.6;热贡献指数持续增长,1990年为4.5%、2000年为38.4%,2005年为62.9%;冷贡献指数逐步增长,1990年为1.2%,2000年为1.8%,2005年为6.8%。
Taking the rapidly urbanized Dongguan City of Guangdong as a case, and by using Landsat/TM and ETM ^＋ data, the land surface temperature （LST） was retrieved via mono-win- dow algorithm. A standardized method for treating the LST was proposed, and three thermal envi- ronment indices （relative thermal effect index, heat contribution index, and cold contribution in- dex） were built to quantitatively study the effects of urban land expansion on urban thermal envi- ronment. In 1990-2005, the urban land area in Dongguan had a rapid expansion, and the high temperature zone expanded from island-shape to belt-shape and then to lamina-shape. The relative thermal effect index of urban land decreased after an initial increase, being 0. 6 in 1990, 1. 0 in 2000, and 0. 6 in 2005. The heat contribution index increased persistently, which was 4. 5% in 1990, 38.4% in 2000, and 62.9% in 2005, and the cold contribution index increased gradually, which was 1.2% in 1990, 1.8% in 2000, and 6.8% in 2005.
出处
《生态学杂志》
CAS
CSCD
北大核心
2009年第11期2347-2352,共6页
Chinese Journal of Ecology
基金
广东省社会发展计划项目(2006B37201008
2008B0303072)
国家自然科学基金重大国际(地区)合作资助项目(50720165805)
关键词
城镇用地
热环境
遥感
东莞
urban land use
thermal environment
remote sensing
Dongguan City.
