天津市土地利用/覆被变化对城市热岛的影响  

Impact of Land Use/Land Cover Change on Urban Heat Island in Tianjin City

作　　者：赵梓萌 孟翔晨 ZHAO Zimeng;MENG Xiangchen(School of Geography and Tourism,Qufu Normal University,Rizhao 276826,China)

机构地区：[1]曲阜师范大学地理与旅游学院,山东日照276826

出　　处：《地理空间信息》2024年第11期66-72,共7页Geospatial Information

基　　金：山东省自然科学基金资助项目(ZR2021QD055);山东省高校优秀青年创新团队资助项目(2022KJ178)。

摘　　要：利用1992—2020年6期Landsat LST数据计算的城市热岛比指数和中国年度土地覆盖数据,分析了天津市中心城区和环城4区的城市热岛和土地利用/覆被时空变化特征,并利用地理探测器对其影响因子进行探索。结果表明,研究期间建设用地面积增加了31.9%,耕地面积减少了26%,大部分耕地转化为建设用地,其他地类转出量变化较小;平均LST先升后降,城市热岛比指数先升后降再上升;归一化建筑指数(NDBI)和归一化植被指数(NDVI)分别与LST呈正相关和负相关。地理探测器分析结果显示:各因子对LST的影响程度为NDBI>NDVI>PD>DEM。研究结果可为缓解天津城市热岛提供依据。Taking the central urban area and the four districts around the city of Tianjin as the study area,we used Landsat image data acquired from 1992 to 2020 to analyze the spatio-temporal change characteristics of land use/land cover and urban heat island,and used Geodetector to explore the influence factors.The results showed that the construction land area increased by 31.9%and the cultivated land area decreased by 26%,with most of cultivated land converted into construction land and other types of land turned out to be insignificant but also decreased to some extent.The average land surface temperature(LST)increased and then decreased,and the urban heat island index changed to increase,decrease and increase.Normalized difference building index(NDBI)and normalized difference vegetation index(NDVI)were positively and negatively correlated with LST,respectively.The results of Geodetector showed that the influence of each factor on LST was ranked as NDBI>NDVI>PD>DEM.This research result can provide a basis for mitigating urban heat island in Tianjin City.

关 键 词：土地利用/覆被 LST 城市热岛比指数 地理探测器 

分 类 号：P237[天文地球—摄影测量与遥感]