重庆市南岸区土地利用与地表温度响应研究
2021-09-03周韩梅董飞
周韩梅 董飞



摘要 以重庆市南岸区为例,应用遥感技术和地理信息系统技术,选取Landsat 5 TM影像和Landsat 8 OLI_TIRS影像作为主要数据源,基于单窗算法反演地表温度,并结合该区土地利用变化研究两者的响应关系。结果表明,南岸区耕地和林地在减少,建设用地在增加,共有31.32 km2的耕地和林地转为了建设用地;南岸区的高温区由西部逐渐转移到中部和南部,2013年之前的升温区和降温区呈现东西均匀分布,2013年之后大部分区域处于升温区;南岸区不同土地利用类型的地表温度高低以及升温速率呈现出建设用地>耕地>林地>水域;城市土地连片扩建会升高地表温度,林地在规模范围内对地表温度能产生显著的降温效应。
关键词 土地利用;地表温度;单窗算法;响应;微域尺度;重庆市南岸区
中图分类号 F 323.2 文献标识码 A 文章编号 0517-6611(2021)15-0079-06
Abstract Taking Nanan District of Chongqing City as an example, remote sensing technology and GIS technology were applied. We used Landsat 5 TM image and Landsat8 OLI_TIRS image as the main data source,based on the singlewindow algorithm to invert the surface temperature, and combined with the land use change in the area to study the relationship between the two responses. The result showed that arable land and forest land were being reduced, and construction land was being increased in the Nanan District, and a total of 31.32 km2 of arable land and forest land had been converted to construction land. The high temperature area in Nanan District gradually shifted from the west to the middle and the south. The warming and cooling areas before 2013 showed an even distribution from east to west, and most of the areas were in the warming area after 2013.The surface temperature of different land use types in Nanan District and the warming rate presented construction land>arable land>forest land>water areas.The expansion of urban land will increase surface temperature, and the forest land in the scope of land surface temperature can produce a significant cooling response.
Key words Land use;Surface temperature;Singlewindow algorithm;Response;Microdomain scale;Nanan District of Chongqing City
作者简介 周韩梅(1995—),女,重庆人,硕士研究生,研究方向:土地利用与区域发展、农村经济。
收稿日期 2021-03-22
土地利用/覆被变化(简称LUCC)是全球变化研究的重要领域,是学术界最为关注的热点问题之一[1-2]。目前,农村人口大量涌入城市地区以及城镇化进程加速,快速城市化导致土地利用与覆被格局发生剧烈变化,对城市生态系统的影响主要是不透水地面增加、水域和林地的大量占用、废弃垃圾物品的大量输出等,致使城市地表温度上升。20世纪50年代,Manley正式将这种现象定义为“城市热岛效应”(urban heat island,UHI)[3-5]。联合国政府间气候变化专门委员会(IPCC)发表的气候变化评估报告指出近百年来地球表面温度将保持上升的趋势[6]。城市热岛效应……
