基于Landsat8的天津地区夏季城市热岛区分布特征研究  

Distribution characteristics research of summer urban heat island in Tianjin based on Landsat-8 data

作　　者：杜晋苗 孙艳玲[1] 马振兴[1] 王中良[1] 

机构地区：[1]天津师范大学城市与环境科学学院,天津300387

出　　处：《天津师范大学学报（自然科学版）》2015年第4期41-47,共7页Journal of Tianjin Normal University：Natural Science Edition

基　　金：国家科技支撑计划项目课题资助项目(2012BAC07B02);教育部新世纪优秀人才支持计划资助项目(NCET-10-0954)

摘　　要：为掌握城市热岛区的分布特征以寻求缓解城市热岛效应的可行方法,选取2013年7月24日和8月25日两景Landsat8天津地区遥感影像,采用单窗算法反演地表温度,并在此基础上,利用Senanayake等提出的方法确定夏季城市热岛区,分析热岛区与植被和水体的关系.结果表明:研究区夏季地表温度平均值约为31.5℃,以中温区和较低温区为主;热岛区的地表温度在36℃以上,所占区域为研究区面积的6.12%,且空间分布不均,呈现市区和塘沽中东部2个中心,景观格局呈零星状和组团状,热岛区斑块面积相差较大;结合实例采用空间叠加法分析热岛区与植被和水体的关系,发现热岛区内几乎无植被和水体分布,说明水体和植被对热岛具有缓解作用.In order to know well the distribution characters of urban heat island areas to seek possible ways to alleviate ur- ban heal island effect, the spatial distribution of summer urban heat island was inverted using mono-window algorithm choosing l,andsat8 thermal band data of July 24, 2013 and August 25, 2013, and then the land surface temperature （IST） was retrieved and the relationship between urban heat island （ UHI ） with vegetation and water was studied using the method proposed by Senanayake based on the spatial distribution of summer urban heat island. The results show that the average land surface temperature is about 31.5 ℃ in summer, medium temperature area and relatively low temperature area account for the main part of the study area. The LST of heat island area is about 36℃ above, the area of heat island area account for 6.12% of the study area, and two centers of heat island area are distributed in downtown and east-central Tanggu be- cause of the nonuniform of spatial distribution, and the landscape pattern is developed to the coexist between group and sporadic distribution, plaque area of heat island have quite different. The vegetation and water area is not covered in the heat island area, and the relieving effect of vegetation and water is remarkable in heat island area which is proved by the relationship among heat island area, vegetation and water using spatial overlay method combined with the examples.

关 键 词：城市热岛区 地表温度 单窗算法 夏季 天津地区 

分 类 号：P463.3[天文地球—大气科学及气象学]