摘要
随着全球变暖和城市化进程的加快,城市区域的热环境问题日益凸显。以福州为例,基于遥感、地理信息系统和地统计学等方法,通过多尺度空间模式,定量分析以地表温度贡献度为表征的城市热环境时空变化及其特征。结果表明:①1993—2016年,研究区的土地利用/覆盖类型发生了显著变化,建设用地净增长1231.04 km2,变化率高达295.33%;耕地被建设用地占用。②地表温度空间格局变化明显,中高温区以闽江水域为轴向周边区域逐渐蔓延,低温区和次低温区面积显著减少。③1993—2016年,福州所辖各县市区地表温度贡献时空分布不均。其中,中心城区(鼓楼区、台江区、仓山区、晋安区和马尾区)对地表温度上升表现为正贡献,闽清县和永泰县表现为负贡献。从不同土地利用/覆盖类型来看,林/草地、耕地、水体对地表温度升高有负贡献,建设用地表现为正贡献。④多距离空间聚类分析(Ripley’s K函数)显示,地表温度集聚与分散存在尺度效应;1993—2016年,研究区的地表温度集聚范围逐步扩大、集聚程度增强。
With the intensification of urbanization and global warming,the problems of urban thermal environment are increasingly prominent.On the basis of the remote sensing,geographic information system,geostatistics and multiscale spatial pattern,the spatial-temporal variation characteristics of land surface temperature in urban thermal environment were quantitatively analyzed.The results are as follows:①Dramatic changes in land use/land cover had occurred from 1993 to 2016 in the study area.The net increase area of construction land was1231.04 km2,with a change rate of 295.33%.Cultivated land was occupied by construction land.②The area of middle,sub-high and high temperature zones spread to the surrounding areas gradually with the Minjiang River.The area of sub-low and low temperature zones decreased markedly.③From 1993 to 2016,the contribution of land surface temperature in different urban districts had the characteristics of uneven spatial and temporal distribution.Meanwhile,there was a positive contribution in the process of land surface temperature rise in Fuzhou while there was a negative contribution in Minqing and Yongtai.Forest/grassland,cultivated land,water body and wetland had a negative contribution during land surface temperature rise while construction land contributed positively.④According to the multi-distance spatial cluster analysis(Ripley’s K function),there was a certain scale in the aggregation and dispersion of land surface temperature,in which the aggregation range and degree of aggregation increased in the study area in 24 years.
作者
康文敏
蔡芫镔
郑慧祯
Kang Wenmin;Cai Yuanbin;Zheng Huizhen(College of Environment and Resources,Fuzhou University,Fuzhou 350116,China;Fuzhou Planning Design and Research Institute,Fuzhou 350108,China)
出处
《地球科学进展》
CAS
CSCD
北大核心
2020年第1期88-100,共13页
Advances in Earth Science
基金
晋江市福州大学科教园区发展中心科研项目“基于3S技术的闽江河口湿地表面温度扰动特性及驱动机制研究”(编号:2019-JJFDKY-72)资助.
关键词
热环境
贡献度指数
空间模式
尺度效应
Thermal environment
Contribution index
Spatial pattern
Scale effect
作者简介
第一作者:康文敏(1994-),女,福建南平人,硕士研究生,主要从事城市生态方面研究.E-mail:wenmin_k1994@126.com;通信作者:蔡芫镔(1982-),男,福建福州人,博士,主要从事城市生态和流域规划与管理方面研究.E-mail:caiyuanbin82@163.com
