Long-term analysis of the urban heat island effect using multisource Landsat images considering inter-class differences in land surface temperature products

被引:25
作者
Xu, Xiong [1 ,2 ,3 ]
Pei, Haoyang [1 ]
Wang, Chao [1 ,2 ]
Xu, Qingyu [1 ]
Xie, Huan [1 ,2 ]
Jin, Yanmin [1 ,2 ]
Feng, Yongjiu [1 ,2 ,3 ]
Tong, Xiaohua [1 ,2 ,3 ]
Xiao, Changjiang [1 ,2 ,3 ]
机构
[1] Tongji Univ, Coll Surveying & Geoinformat, Shanghai 200092, Peoples R China
[2] Tongji Univ, Shanghai Key Lab Planetary Mapping & Remote Sensi, Shanghai 200092, Peoples R China
[3] Tongji Univ, Frontiers Sci Ctr Intelligent Autonomous Syst, Shanghai 201210, Peoples R China
基金
中国国家自然科学基金;
关键词
Multisource Landsat images; Fitted models; Urban heat island effect; Long-term analysis; USE/LAND-COVER CHANGE; MODIS; CITY; RETRIEVAL;
D O I
10.1016/j.scitotenv.2022.159777
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
It is imperative to quantitatively analyze the long-term temporal and spatial characteristics of the urban heat island (UHI) effect on cities for applications, such as urban expansion and environmental protection. Owing to the high spatial resolution and availability of long time-series data, remote sensing images from Landsat satellites are widely used for land surface temperature (LST) retrieval. However, limited by the satellite revisit cycle and image quality, the use of multisource Landsat images in a long-term study of the UI II effect is inevitable. Nonetheless, owing to the differences among multisource sensors, such as Landsat-7 and Landsat-8, them may be apparent deviations in the 1ST results retrieved from different sensor data, which are obtained from the same area and under similar circumstances. Consequently, it is necessary to build a relationship between the 1ST results generated from multisource Landsat sensors for future research on the UHI effect. In this study, Shenzhen city was studied to explore the fitting relationship between the corresponding LST products from Landsat-7 and Landsat-8 images obtained from adjacent dates with similar climatic conditions. Furthermore, factors affecting the fitting models, such as land cover types, seasonal and inter-annual differences, were analyzed. The constructed fitting model had a strong relationship with land cover types but a relatively weak relationship with seasonal and inter-annual differences; this indicates that a pseudo Landsat-8-based LST product can be generated from a Landsat-7-based LST product using a model fitted by a Landsat-7/8 pair obtained from adjacent years (or different seasons). Finally, by considering the consistency between LST products from multisource Landsat images, the spatiotemporal variations in the UHI effect in Shenzhen can be accurately explored using long time-series data.
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页数:14
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