作　　者： ; ; ;

机构地区： 广州大学地理科学学院

出　　处： 《地理与地理信息科学》 2013年第2期112-115,共4页

摘　　要： 该文基于Landsat TM/ETM+影像,获取大尺度区域的温湿指数,并评估温湿指数对不透水表面的响应。利用地表温度代替气温、归一化水汽指数代替相对湿度,对传统的温湿指数计算公式进行改进,并计算了珠江三角洲核心区域的温湿指数。运用空间剖面和归一化方法,分析了温湿指数的时空演变,发现城市范围内的温湿指数要比郊区的高,初夏和秋季的温湿指数城乡间波动要比初冬的大,且温湿指数呈逐年升高趋势。进一步分析温湿指数与归一化裸露指数的关系,发现二者存在明显正相关(相关系数分别为0.41、0.45和0.35,显著性水平为0.01)。表明不透水表面的增加导致温湿指数升高,从而加剧了夏秋季城区范围内人们对热的不舒适感,提高了冬季人们对热的舒适感。 The Temperature-Humidity Indexes （THI） of large scale region were gained from using Landsat TM/ETM＋ satellite images,and its response to impervious surface was evaluated. In this paper, temperature and humidity of meteorology were taken the place of Land Surface Temperature （LST） and Normalized Difference Moisture Index （NDMI） retrieved from remote sensed data respectively, the traditional computational formula of THI was improved by using LST and NDMI, and THI of typical region of the Delta of the Pearl River were calculated. The methods of spatial profile and normalize were used here to analyze the spatial-temporal characteristics. The results showed that THI of urban was higher than that of suburb, fluctuations of THI between urban and suburb were bigger in late summer and autumn than that in early winter; and THI increased with years. Statistics between THI and Normalized Difference Building Index （NDBI） shows：THI and NDBI has a relatively positive correlativity （r=0. 41,0. 45 and 0.35 respectively,P=0.01）. THI increases with the impervious surface, and impervious surface has intensified hot discomfort of people in urban area during the summer and autumn, but raised hot comfort during the winter.

关 键 词： 陆地卫星 温湿指数 改进 不透水表面

领　　域： [环境科学与工程] [自动化与计算机技术] [自动化与计算机技术]