中文摘要：

为了辨析干旱区绿洲一荒漠地表温度时空分布对不同下垫面的响应特征，以叶一喀河三角洲绿洲为研究区，MODIS地表温度产品和土地利用数据相结合，分别提取LST和NDVI，研究地表温度的时空分异特征及其与NDVI的关系。结果表明：（1）研究区NDVI值越高，LST值越低；NDVI值越低，LST值越高，NDVI和LST之间存在明显的反相关关系；空间分布上来看，绿洲植被覆盖度呈现东、西部高而中部裸地低，地表温度分布状况则中部裸地高而东、西部低，这表明二者具有明显相反的空间分布特征；（2）研究区四季地表温度变化显著，昼夜温差很大，水域相比于裸地，水体夜间温度高于裸地；其中，春季温度分布在-0．11-37．94℃之间，夏季温度分布在10．63—54．18℃之间，秋季温度分布在2．54—38．84℃之间，冬季温度分布在-18．76—21．05℃之间；（3）从不同土地覆被地表温度的分布上看，在裸地、城市建设用地所覆盖区域地表热量丰富，水域、湿地所覆盖区域热量呈递减趋势。不同下垫面在冬夏两季温度变化和同一季节内昼夜温度变化显著，植被类型和植被覆盖度及其空间组合在不同程度地影响地表温度的时空分布。

英文摘要：

In order to discriminate the response of the land surface temperature （LST） to underlying surface of arid oasis area, this paper studied the spatio-temporal distribution characteristics of the LST as well as the relationships between LST and normalized difference vegetation index（NDVI） taking desert-oasis area of Kaxgar river and Yarkan river as a sample area using temperature products of MODIS and land use/cover data.Results show that ： （1） in the research area the NDVI higher is, the lower LST is ; conversely, the NDVI lower, the LST higher.LST is inverse proportion to the NDVI.The NDVI is higher in the parts of the east and west area, on the contrary the LST higher in central section than the east and west. （2） It is found that the distribution of land surface temperatures is very differ- ent in different season and different regions.In spring, the land surface temperatures varies between-0.11 ℃ and 37.94 ℃.In summer,it varies between 10.63 ℃ and 54.18 ℃.In autumn, it varies between 2.54 ℃ and 38.84 ℃.In winter it varies between -18.76 ℃ and 21.05 ℃. （3） From the view of LST in different land use/cover type：the LST of the bare land and urban construction land area are high than water and wetland.It is not only the seasonal temperature fluctuation evident, but the temperature fluctuations of day and night in every season are also evident.The Coupling influence of the vegetation type and vegetation coverage effects the spatio-temporal distribution of land surface temperature.