城市化背景下大连市热力景观格局演变特征  

Characteristics of the evolution of the thermal landscape pattern of Dalian city in the context of urbanisation

作　　者：杨俊[1] 王俊杰 张育庆 YANG Jun;WANG Junjie;ZHANG Yuqing(School of Geographical Sciences,Liaoning Normal University,Dalian 116029,China)

机构地区：[1]辽宁师范大学地理科学学院,辽宁大连116029

出　　处：《辽宁师范大学学报(自然科学版)》2025年第1期1-9,共9页Journal of Liaoning Normal University:Natural Science Edition

基　　金：辽宁省振兴人才计划(XLYC2202024);辽宁省教育厅基础科学研究项目(LJKZ0964);中央高校基本科研业务费专项资金资助项目(N2111003);贵州省自然科学基金资助项目((2019)1150)。

摘　　要：城市化进程不断加快,由于城市地表发生明显改变,导致城市热岛效应不断加剧.因此,探究城市化背景下大连市热力景观格局时空演变特征,对发现城市热岛效应的演变规律,寻求缓解措施具有参考意义.基于1995年、2001年、2005年、2009年、2015年、2020年共6期的Landsat系列遥感影像,采用单窗算法反演地表温度,运用均值标准差法和景观格局指数,定量分析了大连市城市热力景观格局时空演变特征.结果表明:①从空间上看,研究区地表温度较高的地区主要集中在甘井子区的北部和东北部以及旅顺口区的北部,而高温区和次高温区基本连成一片;②研究区热力景观斑块在数量上变化明显,其中,以高温区变化尤为突出,减少了12834.9hm^(2);③在形态上,随着研究区热力景观斑块逐渐单一化,斑块形状趋向简单化;④研究区热力景观斑块在结构上不断聚集成片,景观斑块的延展性和连接程度逐渐升高,像素间聚合成斑块的程度变大且斑块类型面积越来越均匀,并以甘井子区表现最为明显,且研究区的热力景观破碎化程度逐渐降低.The process of urbanisation has been accelerating,resulting in the increasing urban heat island effect due to the obvious changes in the urban land surface.Therefore,it is of reference significance to explore the spatial and temporal evolution characteristics of the thermal landscape pattern of Dalian in the context of urbanisation to discover the evolution pattern of the urban heat island effect and to seek mitigation measures.This paper quantitatively analyses the spatial and temporal evolution characteristics of the urban thermal landscape pattern in Dalian based on six periods of Landsat series remote sensing images in 1995,2001,2005,2009,2015,and 2020.It inverts the surface temperature by using the single-window algorithm,and applies the method of standard deviation of mean value and landscape pattern index.The results show that:(1)Spatially,the areas with higher surface temperatures in the study area are mainly concentrated in the northern and northeastern parts of Ganjingzi district and the northern part of Lvshunkou district,while the high-temperature and sub-high-temperature areas are basically connected.(2)There are obvious changes in the number of thermal landscape patches in the study area,with the high-temperature zone showing a particularly prominent change,decreasing by 12834.9 km^(2).(3)Morphologically.The shape of the patches tends to be simpler as the thermal landscape patches in the study area gradually become more homogeneous.(4)Thermal landscape patches in the study area continue to aggregate into patches structurally.The degree of ductility and connectivity of landscape patches gradually increases,the degree of aggregation into patches between pixels becomes larger and the area of patch types becomes more and more homogeneous.This trend is most obvious in the Ganjingzi district,and the degree of fragmentation of the thermal landscape in the study area gradually decreases.

关 键 词：热岛效应 地表温度 热力景观格局 城市化 

分 类 号：X16[环境科学与工程—环境科学] TU984[建筑科学—城市规划与设计]