摘要
快速发展的中小城市具有与发达城市不同的热环境特征,对其研究有助于理解热岛形成的过程阶段。以2009年、2014年的Landsat影像,通过单窗算法反演快速发展的滨城区的地表温度并提取NDVI、NDBI、MNDWI指数,对城市热岛、冷岛效应及其与下垫面关系进行定性、定量分析,结果表明:滨城区夏季热岛效应明显,地表温度建筑用地>耕地>林地>水体,冬季呈现冷岛效应,地表温度耕地>林地>建筑用地>水体;作为下垫面重要表征组分的植被、水体对改善城市热岛效应有积极作用,不透水面增加会加剧热岛效应,且温度影响效果建筑用地>植被>水体。城市环境中的气候因素、人为因素和下垫面特性都是热岛、冷岛形成的重要原因,随城市发展,热岛增强,冷岛减弱。
The rapid development of small and medium-sized cities has different thermal environment characteristics with the developed cities, and a research on them helps to understand the process of the heat island. Based on the Landsat images in the year 2009 and 2014, a single window algorithm was used to reverse the rapid development of surface temperature of Bingcheng District and to extract NDVI, NDBI, MNDWI index. Both the qualitative and quantitative method were used to analyze the urban heat island, cold island effect and its relation with the underlying surface and the results show that: the summer heat island effect of Bingcheng District is obvious. Land surface temperature construction land > farmland > forest water. Cold island occurs in winter, surface temperature farmland>woodland> construction land> water body; the vegetation and water, as an important component of the underlying surface, have a positive effect on improving the urban heat island.The effect of the heat island will be aggravated by the increase of the water surface, and the temperature effect is construction land> the vegetation> water. The climatic factors, man-made factors and underlying characteristics of the urban environment are important reasons for the formation of the heat island and cold island. With the development of cities, the heat island is enhanced and the the cold island weakens.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2018年第S1期318-324,共7页
Environmental Science & Technology
基金
山东省省级水利科研及技术推广项目(SDSLKY201312)
山东省气象科学技术研究项目(2016sdqxm20)
关键词
热岛效应
冷岛
温度反演
下垫面
中小城市
heat island effect
cold island
temperature retrieval
underlying surface
medium and small cities
