成都市热岛格局演变及其与NDVI的关系  

Evolution of heat island pattern and its relationship with NDVI in Chengdu

作　　者：李喆[1] 胡瑄 LI Zhe;HU Xuan(School of Ecological Environment,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学生态环境学院,四川成都610059

出　　处：《环境生态学》2022年第2期71-75,共5页Environmental Ecology

摘　　要：以成都市第二绕城高速以内区域为研究对象,通过遥感手段获取2014—2021年研究区地表温度和NDVI数据,通过均值-标准差法对热岛强度进行分级,分析热岛分布格局,并结合相应年份的NDVI参数,分析热岛强度与NDVI的相关关系,建立回归方程。结果表明:1)2014—2021年,成都市地表中、高温区面积逐年增多,次中温区的面积逐年减少;2)NDVI与地表温度呈负相关,说明植被对热岛效应有缓解作用;3)成都市地表温度呈环状分布,成都市三环外至绕城高速之间的区域地表温度高于周边区域,城市热岛强度趋于“空心化”。This paper takes the area within the Chengdu Second Ring Expressway as the research object,obtains the surface temperature and NDVI data in the study area from 2014 to 2021 by means of remote sensing,classifies the intensity of the heat island by means of the mean-standard deviation method,analyzes the distribution pattern of the heat island,and analyzes the distribution pattern of the heat island.Combined with the NDVI parameters of the corresponding years,the correlation between heat island intensity and NDVI was analyzed,and a regression equation was established.The results show that:(1)From 2014 to 2021,the area of medium and high temperature areas on the surface of Chengdu increased year by year,and the area of sub-middle temperature areas decreased year by year;(2)NDVI was negatively correlated with surface temperature,indicating that vegetation has a mitigation effect on the heat island effect;(3)The surface temperature in Chengdu is distributed in a ring shape.The surface temperature of the area between the third ring road and the Ring Expressway in Chengdu is higher than that of the surrounding area,and the intensity of the urban heat island tends to be“hollow”.

关 键 词：热岛效应 成都市 NDVI 

分 类 号：X16[环境科学与工程—环境科学]