摘要
城市化进程带来了城市热环境的恶化,植被作为城市生态环境的重要组成部分,对城市热环境的影响和调节具有重要作用。利用济南市TM/ETM+图像,通过反演地表温度(LST)和植被指数(NDVI),研究济南市的热环境和植被之间关系,以及城市热环境和NDVI的时空变化规律,得出了LST和NDVI是负相关关系;城市热岛范围逐渐扩大,尤其是向东和向南方向,且与济南市城市发展的时空方向一致;与2001年相比,2009年城市内部温度变化曲线趋于缓和,但不同地表类型之间的温度差值扩大;NDVI的变化特征与LST相反。
The process of urbanization has brought the deterioration of the urban thermal environment.As one of the most important ecological components,vegetation plays crucial role in regulating thermal environment in urban area.In this paper,the relationship between thermal environment and vegetation,and temporal and spatial variations of urban thermal environment and normalized difference vegetation index（NDVI） were examined through the inversion land surface temperature（LST） and NDVI of Jinan based on TM/ ETM ＋ data.It was found that LST and NDVI were negatively correlated.The urban heat island gradually expanded,especially in eastern and southern directions,which were in accordance with the direction of the urbanization of Jinan.Compared with 2001,the internal urban LST curves in 2009 tended to alleviated,but the temperature difference of different surface types increased.The change characteristics of NDVI was opposite to LST.
出处
《西北林学院学报》
CSCD
北大核心
2012年第2期50-55,共6页
Journal of Northwest Forestry University
基金
国家863计划项目(2008AA121806)
山东省自然科学基金(2009BSB01784)
关键词
济南市
城市热环境
地表温度
NDVI
Jinan
urban thermal environment
land surface temperature
NDVI
