摘要
以广州市天河区为研究区,通过对2005年至2019年四期Landsat遥感影像进行地表温度反演,采用均值-标准差法对反演结果进行分级,从小尺度角度分析城市中心区域地表温度的空间分布及时空演变;对城市生态斑块进行提取,分析生态斑块不同缓冲距离的降温幅度。研究结果表明:2005年至2019年城市高温区及次高温区的面积有所降低,低温区面积有所增加。低温区主要分布在天河区北部植被覆盖较高的区域,而天河区南部主要以建设用地为主,因此天河区南部主要以高温区和次高温区为主且分布广泛。每一类生态斑块的降温幅度都是先增大后逐渐趋于平缓。不同的缓冲距离生态斑块的降温幅度也有所不同,距离越近,降温幅度越大,即降温效益越好,但超过一定范围,降温幅度开始降低。
Taking Tianhe District of Guangzhou City as the research area,through the inversion of land surface temperature from the four phases of Landsat remote sensing images from 2005 to 2019,the mean-standard deviation method was used to classify the inversion results,and from a small-scale perspective,the surface temperature in the central area of the city was analyzed.Spatial distribution and temporal evolution;urban ecological patches are extracted to analyze the cooling range of ecological patches with different buffer distances.The research results show that from2005 to 2019,the area of urban high-temperature areas and sub-high-temperature areas decreased,and the area of lowtemperature areas increased.The low temperature area is mainly distributed in the area with high vegetation coverage in the northern part of Tianhe District,while the southern part of Tianhe District is dominated by construction land,so the southern part of Tianhe District is mainly dominated by high temperature areas and sub-high temperature areas and is widely distributed.The cooling rate of each type of ecological patch increases first and then gradually becomes flat.The cooling rate of ecological patches varies at different buffer distances.The closer the distance is,the greater the cooling rate,that is,the better the cooling effect.,but beyond a certain range,the cooling rate begins to decrease.
作者
李晓
刘洪杰
LI Xiao;LIU Hongjie(School of Geography,South China Normal University,Guangzhou 510631,China)
出处
《热带地貌》
2022年第1期71-77,共7页
Tropical Geomorphology
关键词
热环境
地温反演
降温效益
广州
Thermal environment
Geothermal inversion
Cooling Benefit
Guang Zhou
作者简介
李晓(1996-),女,内蒙古乌兰察布人,主要从事环境生态学研究。E-mail:lxx_0705@163.com;通信作者:刘洪杰(1962-),男,山东济南人,教授,主要从事城市生态环境与景观规划研究。E-mail:jack@scnu.edu.cn
