深圳城市绿地空间结构对绿地降温效应的影响

利用遥感影像陆地表面温度反演和野外实地观测温湿度的方法,综合分析了深圳特区内绿地斑块的面积、周长、形状、植被类型等空间结构特征与绿地降温效应的关系。结果表明,绿地斑块对周边热环境的降温效应随其面积、周长和形状指数的增大而增大,形状指数与温度的相关性显著高于斑块面积和周长与温度的相关性;在绿地斑块面积一定的情况下,提高斑块形状的复杂性更有利于发挥绿地的降温效应。在夏季高温季节,不论是居住区绿地、还是道路绿地或公园绿地,乔灌草型、乔草型、灌草型、草地等4种植被结构绿地均发挥着不同程度的降温作用;从其降温效应来看,乔草型绿地的降温效应优于乔灌草型绿地,二者的降温效应均显著优于灌草型和草坪型绿地。

Effects of Structure Characteristics of Urban Green Land on the Temperature-lowering in Shenzhen City

Using the methods of the land surface temperature retrieval and the in site measurement of the urban green land on the spot,the correlations between temperature lowering effect and structure characteristics of urban green lands were studied in Shenzhen.The results showed that the temperature lowering effect were positively correlated with the area,the perimeter and P/A value of the green plaque,but the correlation between P/A value and temperature lowering effect was higher than the other two indexes.Moreov...