水土保持通报2011，Vol.31Issue(5)：230-234,5.
基于Landsat TM/ETM~＋的西安市城市热岛效应时空演变
Spatio-temporal Characteristics of Urban Heat Island Effect of Xi′an City Based on Landsat TM/ETM＋
摘要
Abstract
To study spatio-temporal characteristics of urban heat island effect of Xi′an City,the study inverted brightness temperatures of three time periods based on three Landsat TM/ETM＋ images of 1990,2002 and 2007,which were then normalized and scaled into six grades to calculate urban-heat-island ratio index（URI）.The impacts of vegetation on urban heat island were further discussed through the relationship between NDVI values and urban heat islands.The results show that URI increased and the effects of urban heat island were strengthened in Xi′an City from 1990 to 2007.During this period,the urban heat islands evolved from scattered spots to flakes,and then to connected flakes,and the distribution of urban heat island approached from the districts of Lianhu,Xincheng,Yanta,Beilin to the districts of Weiyang and Baqiao.The NDVI values were negatively correlated with urban heat island.Appropriately increasing urban green areas might be able to reduce significantly the urban heat island effect.关键词
亮度温度/城市热岛比例指数/城市热岛效应/西安市Key words
brightness temperature/urban-heat-island ratio index（URI）/urban heat island/Xi′an City分类
资源环境引用本文复制引用
苏雅丽,张艳芳..基于Landsat TM/ETM~＋的西安市城市热岛效应时空演变[J].水土保持通报,2011,31(5):230-234,5.基金项目
国家自然科学基金项目“西北黄土高原台塬区土地资源开发利用与生态安全动态分析” （）
陕西省社会科学基金项目“陕西土地利用的低碳效应与低碳经济发展模式研究” （）
教育部人文社会科学研究规划基金项目“区域土地利用的低碳效应与低碳经济发展模式研究：以西安市为例” （）
