西安夏季地表温度时空演变特征  

Spatial evolution characteristics of summer surface temperature in Xi’an city

作　　者：陈秋计[1] 杭梦如 郭昭 CHEN Qiuji;HANG Mengru;GUO Zhao(College of Geomatics,Xi’an University of Science and Technology,Xi’an 710054,China;Dongguan Urban Planning and Design Insitute,Guangdong 523001,China)

机构地区：[1]西安科技大学测绘科学与技术学院,西安710054 [2]东莞市城建规划设计院,广东东莞523001

出　　处：《测绘科学》2020年第11期139-146,共8页Science of Surveying and Mapping

摘　　要：针对单一地表特征参数在研究地表覆盖类型对地表温度的影响中存在的局限性问题,以西安市区为研究对象,Landsat TM/OLI影像为数据源,采用单窗算法进行地表温度反演计算,获得西安市主城区1992至2018年中4期夏季地表温度数据。在此基础上,分析了1992—2018年西安市夏季地表温度时空变化特征,并利用剖面线分析法揭示了研究区LST与NDMI、IBI的内在关系。研究结果表明:在26年间西安市主城区夏季地表温度经历了"平缓上升、快速上升、有效降低"的变化过程;西安市夏季地表温度的空间分布与城市扩张方向相一致;地表温度与NDMI呈显著负相关,而与IBI呈显著正相关的关系,表明城市扩张人工建筑面积的增加是导致地表温度的升高的原因之一,并且有效的绿化措施和水体湿地的运用可对其周边环境带来一定的降温效果。In view of the limitation of single land surface characteristic parameter in studying the influence of land cover type on land surface temperature,taking Xi’an urban area as the research object and Landsat TM/OLI image as the data source,the land surface temperature inversion calculation is carried out by using single window algorithm,and the summer land surface temperature data from 1992 to 2018 in the main urban area of Xi’an are obtained.On this basis,the spatio-temporal change of temperature in xi’an city in summer from 1992 to 2018 were analyzed,and the internal relationship between LST,NDMI and IBI in the research area was revealed by using section line analysis method.The research results show that:During the 26 years,the surface temperature had experienced a changing process of"gentle rise,rapid rise and effective decrease";The spatial distribution of surface temperature in summer of Xi’an was consistent with the direction of urban expansion;Land surface temperature has a significant negative correlation with NDMI and a significant positive correlation with IBI.The result shows that the increase of artificial building area in urban expansion is one of the reasons for the increase of land surface temperature.The effective greening measures and the use of water and wetland can bring some cooling effect to the surrounding environment.

关 键 词：地表温度 NDMI IBI 西安市 时空演变特征 

分 类 号：P237[天文地球—摄影测量与遥感]