摘要
基于赣江新区2014、2017和2020年三景Landsat-8卫星影像,利用大气校正法反演其地表温度,采用热场变异指数对热岛强度进行分级,并对3个不同时期的土地利用类型进行监督分类和精度评价,分析了赣江新区热岛效应及土地利用时空变化特征。结果表明:(1)赣江新区热岛现象明显且热岛面积在逐步扩大,占比由2014年的19.3%增加到2020年的26.2%,增加最明显的区域是经开组团、临空组团的樵舍镇、永修组团的艾城镇和共青组团的江益镇。(2)3期土地利用类型中面积最大的均为林地,占比分别为45%、50%和40%;2014—2020年这6 a间建设用地和水域面积在增加,耕地和林地面积在减少,土地利用变化程度依次为水域>建设用地>耕地>林地。(3)各土地利用类型地表温度均值的关系依次为建设用地>耕地>林地>水域;由于城镇化的发展,2020年各种土地利用类型的温度为3期中最高。
Based on the Landsat-8 satellite images of Ganjiang New Area in 2014,2017 and 2020,the atmospheric correction method was used to retrieve its surface temperature,and the thermal field variation index was used to grade the heat island intensity.The monitoring classification and precision evaluation of land use types in three different periods were carried out,and the characteristics of the heat island effect and the spatial-temporal change of land use in Ganjiang New Area were analyzed.The results show that:(1)The phenomenon of heat island in Ganjiang New Area is obvious,and the area of heat island is gradually expanding,with the proportion increasing from 19.3%in 2014 to 26.2%in 2020.The most obvious increase is in the Economic Development Group,Qiaoshe Town in Linkong Group,Aicheng Town in Yongxiu Group and Jiangyi Town in Gongqing Group.(2)Among the three land use types,the largest area is forest land,accounting for 45%,50%and 40%respectively.During the six years from 2014 to 2020,the area of construction land and water area is increasing,while the area of cultivated land and forest land is decreasing.The degree of land use change from large to small is water area>construction land>cultivated land>forest land.(3)The relationship between the mean surface temperature of each land use type is construction land>cultivated land>forest land>water area.Due to the development of urbanization,the temperature of various land use types in 2020 is the highest in the three phases.
作者
温新龙
彭王敏子
蒋帅
孙擎
WEN Xin-long;PENG Wang-minzi;JIANG Shuai;SUN Qing(Jiangxi Institute of Meteorological Sciences,Nanchang 330096,China;College of Applied Meteorology,Nanjing University of Information Science&Technology,Nanjing 210044,China;Chinese Academy of Meteorological Sciences,Beijing 100081,China)
出处
《江西农业学报》
CAS
2023年第4期177-183,共7页
Acta Agriculturae Jiangxi
基金
国家重点研发计划项目“粮食主产区气象灾害监测预警综合信息平台研发与应用”(2022YFD2300204)
江西省重点研发计划项目“精细化气象评估技术在赣江新区工业布局与规划中的应用研究”(20202BBGL73063)。
关键词
地表温度
热岛效应
土地利用类型
赣江新区
Land surface temperature
Heat island effect
Land use type
Ganjiang New Area
