蓝绿景观结构对城市热岛的减缓效应定量分析  

Quantitative Analysis of Mitigation Effect of UrbanBlue-Green Spaces on Urban Heat Island

作　　者：姜允芳[1,2] 黄静 JIANG Yun-fang;HUANG Jing(School of Urban and Regional Science,East China Normal University,Shanghai 200241,China;The Center for Modern Chinese City Studies,East China Normal University,Shanghai 200241,China;Shenzhen Overseas Chinese Town Middle School,Shenzhen 518053,China)

机构地区：[1]华东师范大学城市与区域科学学院,上海200241 [2]中国现代城市研究中心,上海200241 [3]华侨城中学,广东深圳518053

出　　处：《长江流域资源与环境》2022年第9期2060-2072,共13页Resources and Environment in the Yangtze Basin

基　　金：国家自然科学基金项目(51878279;51878418)。

摘　　要：在城市热岛影响城市热舒适性背景下,蓝绿景观空间成为有效减缓城市热岛效应的重要途径。选取上海18条骨干河道滨水区域,采用增长回归树(BRT)模型,量化分析蓝绿景观空间形态结构因子与地表温度之间的边际效应互动影响关系。结果表明:近郊区绿地冷岛效应最强,远郊区次之,中心城区最差。在绿地结构形态指标方面,植被覆盖度和面积是影响绿地降温的主导因素。绿地覆盖度、面积、景观形状指数和地表反照率的边际效应阈值分别是0.3、50 hm2、2和0.16。在蓝绿网络结构指标方面,水面率和距河岸距离影响作用较大。水面率越大,降温越明显。距河岸距离和生态斑块集聚度的边际阈值分别为400 m和75/100。研究可为蓝绿景观空间应对全球气候变化发展提供有益指导。Under the background that urban heat island affects urban thermal comfort,blue-green space has become an important way to effectively mitigate urban heat island effect.Selecting 18 river riparian buffer in Shanghai,the marginal effect of various indices of waterfront green spaces on the distribution of LST was quantitatively analyzed by the boosted regression tree(BRT)model.The results showed that:the cooling island effect of green spaces was the strongest in the urban periphery,followed by the suburb,and the worst was in the central area.In the aspect of spatial morphological factors of green spaces,the index of Fv and area were the dominant impacting factors on the LST.The marginal effect threshold of Fv,area,landscape shape index and albedo were 0.3,50 ha,2 and 0.16,respectively.In the aspect of spatial structure factors among blue spaces and green spaces,the influence of the index of water surface ratio and the distance to riverbank were larger on the LST.The higher water surface ratio is,the more obvious the cooling island effect is.The marginal effect threshold of the distance to riverbank and cohesion value were 400 m and 75/100,respectively.The study can provide useful guidance for the development of blue-green space coping with global climate change.

关 键 词：热岛效应 蓝绿空间 城市冷岛 增长回归树模型(BRT) 边际效应 

分 类 号：X16[环境科学与工程—环境科学]