寒地城市景观格局对地表温度及碳汇效能影响机制研究——以哈尔滨为例  

the Impact Mechanism of Landscape Pattern on Land Surface Temperature and Carbon Sink Efficiency in Cities in Cold Regions:A Case Study of Harbin

作　　者：宋海宏 唐婧楠 崔鹏 郑培玉 SONG Haihong;TANG Jingnan;CUI Peng;ZHENG Peiyu(Northeast Forestry University,College of Landscape Architecture,Harbin,150040,China;Harbin Urban and Rural Planning and Design Institute,Harbin 150000,China)

机构地区：[1]东北林业大学园林学院,哈尔滨150040 [2]哈尔滨市城乡规划设计研究院,哈尔滨150000

出　　处：《建筑科学》2025年第2期213-220,236,共9页Building Science

基　　金：黑龙江省优秀青年基金“寒地城市绿地空间格局对碳固影响机制及碳汇预测研究”(YQ2023E003)。

摘　　要：快速城市化背景下,城市绿地在缓解城市热岛方面具有重要作用。本研究结合遥感和实测,探究了哈尔滨市不同季节不同尺度下绿地景观格局、植被群落特征、地表温度(Land surface temperature,LST)与植物群落年固碳量(Annual carbon sequestration of plant community,ACSPC)之间关联方式,建立了关联方程。发现建成区LST呈上升趋势,其与景观格局指数关系呈季节性差异;在1500 m和1260 m尺度上景观格局指数与LST相关性最高;平均径级(Mean diameter at breast height,MDBH)、平均冠幅(Mean canopy diameter,MCD)、叶面积指数(Leaf area index,LAI)、夏季植物群落平均固碳能力(Average carbon sequestration capacity,ACSC)与LST呈负相关。天空视域因子(Sky view factor,SVF)和冬季落叶树种占比(Proportion of deciduous trees,PDT)与LST为正相关;在夏季和冬季,MDBH、MCD、ACSC、LAI与ACSPC呈正相关,SVF与ACSPC为负相关;LAI、SVF和MCD(冬季)对LST影响贡献度更大。MDBH、MCD和SVFsum对ACSPC影响贡献更大。本研究对于改善城市生态环境具有重要意义。In the context of rapid urbanization,urban green space plays a vital role in mitigating urban heat islands.This study combined remote sensing and field research to investigate the relationship between green space landscape patterns,vegetation community characteristics,land surface temperature(LST)and annual carbon sequestration of plant community(ACSPC)on different scales and in different seasons in Harbin and established correlation equations.It was found that LST in built-up areas showed an increasing trend,and its relationship with the landscape pattern index showed seasonal differences;the landscape pattern index had a higher correlation with LST on 1,260 m and 1,500 m scales;mean diameter at breast height(MDBH),mean canopy diameter(MCD),leaf area index(LAI),and average carbon sequestration capacity(ACSC)in summer were negatively correlated with LST.The sky view factor(SVF)and proportion of deciduous trees(PDT)in winter were positively associated with LST;in summer and winter,MDBH,MCD,ACSC,LAI were positively correlated with ACSPC,and SVF and ACSPC were negatively correlated;LAI,SVF and MCD(winter)made greater contributions to LST impacts.MDBH,MCD and SVFsum contributed significantly to the effect of ACSPC.This study is of great significance to the improvement of the urban ecological environment.

关 键 词：城市绿地 景观结构 碳汇效率 地表温度 寒地城市 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]