地表热力特征对非渗透表面景观指数的响应——以广州市天河区为例  

Study on response of surface thermal characteristics to the landscape pattern metrics of impervious surface and its application in tianhe district of guangzhou city

作　　者：王亚飞[1] 钱乐祥[1] 焦全军[2] 

机构地区：[1]广州大学地理科学学院,广东广州510006 [2]中国科学院遥感与数字地球研究所,北京100094

出　　处：《商丘师范学院学报》2015年第6期78-83,共6页Journal of Shangqiu Normal University

基　　金：广州市属高校科技计划项目(10A004);省部共建黄河中下游数字地理技术教育部重点实验室开放基金项目(GTYR2011001)

摘　　要：非渗透表面作为土地利用/土地覆盖的重要组成部分,其与城市热环境的关系一直备受关注,其中对地表的增温效应是城市热岛研究中的核心问题.基于广州市天河区2000年Landsat7 ETM+影像数据,分别运用单窗算法和归一化线性光谱混合模型获得地表温度和非渗透表面丰度信息,通过双变量相关性分析、多元线性回归分析以及景观生态学方法,研究了城市地表温度对非渗透表面的响应机制,并且引入主成分分析的方法解决了各景观指数在多元线性回归分析中存在的共线性问题.结果表明:城市地表温度和非渗透表面在空间分布上具有较为明显的一致性,在丰度值小于0.8时,二者呈现非常强的正相关性;当丰度值大于0.8时,非渗透表面空间布局对地表温度影响作用较为明显,选择的14个景观指数中,对地表温度有增温效应的有11个,有降温效应的有3个.研究成果对于改善城市生态环境和加强合理规划都具参考价值.As one of the important of LUCC,the relationship between impervious surface and urban thermal environment has been closely watched,from which,the effect of warming on the surface is the central issue of the study of urban heat island. Using the Landsat 7 ETM ＋ image of the Tianhe district,Guangzhou city in 2000 as the data source, we retrieved land surface temperature by using Mon- window algorithm and developed the Normalization Spectral Mixture Analysis Method to extract the percent of impervious surface（ POIS）. Through Bivariate correlation analysis and Multiple linear regression analysis,in particular,combining with the means of landscape ecology,This paper studies the response of urban surface temperature（ UST） to the impervious surface.However,The introduction of the Principal Component Analysis method solved the Collinearity problem of landscape pattern metrics（ LPMS） in the Multiple linear regression analysis. The results show that UST has high similarity with the impervious surface in the spatial pattern,in which,Both present a very strong positive correlation when POIS is less than 0. 8,however,the spatial distribution of impervious surface plays a more important role when POIS is greater than 0. 8. There are 11 LPMS that have warming effect on UST,and the rest of three LPMS have coolingeffect on UST. The research results have a reference value in fields of inproving the urban ecological environment and strengthening the reasonable planning.

关 键 词：非渗透表面 城市地表温度 景观格局指数 空间格局 响应 

分 类 号：P931.92[天文地球—自然地理学]