中文摘要：

伴随城市化飞跃式发展,城市人口膨胀、不透水面剧增,城市热岛现象日益凸显并对社会经济发展产生严重的负面影响。以2014年Landsat8_OLI遥感影像数据为数据源,利用单窗算法反演地表温度,同时运用GS＋软件和GIS空间分析技术,分析广州市热环境强度等级格局及其空间结构分异特征。结果表明：热岛强度等级所占面积大小完全符合正态分布规律（R^2=0.971）,其中,第Ⅴ、Ⅵ强度等级占据主导格局效应;热岛强度等级中心呈现＂单一中心＂、＂单一中心主导,多个次中心环绕＂以及＂多中心＂的形式,具有一定的演替秩序;而冷岛强度等级中心也呈现＂连片冷岛中心＂、＂单一冷岛中心＂及＂异常冷岛中心＂的形式,但演替秩序不明显。变异函数的结果表明,热岛强度的空间可预测性较高,区域差异较明显并可能存在等级结构。研究结果有助于理解城市化与区域生态环境效应,促进城市可持续发展。

英文摘要：

Along with the rapid urbanization,the expansion of population and explosion of urban impervious surface,the phenomenon of urban heat island is becoming more and more prominent and influences social and economic development seriously in negative ways. Based on Landsat 8_OLI image data in 2014,a mono-window algorithm was implemented for the retrieval of land surface temperature in Guangzhou. The retrieval temperature,together with GS＋/GIS spatial analysis technology,was used for the analysis of the hierarchical characteristics of thermal intensity and its spatial differential characteristics. The results show that the area size of heat island intensity levels completely followed the normal distribution with a fitting degree of R^2= 0.971 and the dominant pattern effect of Ⅴ and Ⅵ intensity levels. The centers of heat island intensity level were observed in forms of ＂single center＂,＂single center surrounded by multiple sub-centers＂,and＂multiple center＂,which followed certain orders of succession. The centers of the rank of cold island intensity were also observed in forms of contiguous cold island center,single cold island center and abnormal cold island center with inconspicuous order of succession. The results of the variable function show that the heat island intensity had high spatial predictability,and obvious regional differences as well as probable hierarchical structure. The results of the study may be helpful for the understanding of the effects of urbanization and regional ecological environment,and the promotion of the sustainable development of the city.