摘要
为研究天津城区热岛效应驱动力,采用Landsat8影像反演地表温度,利用植被指数、改进水体指数、不透水面指数和兴趣点(point of interest,POI)密度等参数研究下垫面和与地表温度的相关性和相对重要性.结果表明:研究区在2015-2020年间热岛效应加剧,热岛重心由西北向东南转移;植被和水体指数与地表温度呈负相关,植被覆盖对地表温度负影响更明显;POI密度与地表温度呈正相关,而餐饮服务类影响最大;不透水面因素对城市热岛影响最大,其相对重要性为45%.综合考虑多种因素研究天津市热岛效应,对分析城市热岛中不同要素的影响程度有重要的意义.
In order to explore driving forces of the heat island effect in Tianjin urban area,parameters such as vegetation index,improved water body index,impermeable surface index and point of interest(POI)density are used to study the correlation and relative importance between underlying surface and surface temperature by using Landsat8 images to retrieve surface temperature.The results show that the heat island effect in the research area is intensified between 2015 and 2020,and the center of gravity of the heat island is shifted from northwest to southeast.The vegetation and water index are negatively correlated with surface temperature,and the vegetation coverage has a more significant negative impact on surface temperature.The POI density is positively correlated with surface temperature,and catering services have the greatest impact.The impermeable surface factor has the greatest impact on urban heat island effects,and a relative importance is 45%.The comprehensive consideration of multiple factors to study the heat island effect in Tianjin is of great significance for analyzing the degree of influence of different factors in the urban heat island.
作者
郭润琳
郭继发
陈鹏飞
GUO Runlin;GUO Jifa;CHEN Pengfei(College of Geographical and Environmental Science,Tianjin Normal University,Tianjin 300387,China)
出处
《天津理工大学学报》
2023年第6期61-69,共9页
Journal of Tianjin University of Technology
基金
国家自然科学基金(41971410)。
关键词
城市热岛
时空变化
兴趣点
人类活动
驱动力
urban heat island
temporal and spatial variation
interest points
human activity
driving forces
