Estimation of the relationship between vegetation patches and urban land surface temperature with remote sensing
Estimation of the relationship between vegetation patches and urban land surface temperature with remote sensing
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DOI：
10.1080/01431160802549252
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发表时间：
2009-04
影响因子：
3.4
通讯作者：
Xiuying Zhang;Taiyang Zhong;Xuezhi Feng;Ke Wang
中科院分区：
文献类型：
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作者：
Xiuying Zhang;Taiyang Zhong;Xuezhi Feng;Ke Wang
植被对城市地表温度的降温作用是众所周知的。然而，植被的结构、组成和空间分布对地表温度的影响却鲜有定量研究。本文采用Landsat ETM+数据检索地表地表温度，IKONOS数据获取植被信息，研究地表地表温度与植被斑块的关系。结果表明：①在城市环境中，乔灌木斑块、草坪斑块和杂草斑块上的ULSTs差异不大，主要受植被斑块边缘效应和破碎化分布格局的影响；(2)地表温度与植被斑块面积、周长、形状指数呈正相关，与周长/面积比呈负线性关系；(3)以土地利用多边形为单位，面积密度与ULST呈二次曲线关系，边缘密度和平均面积密度与ULST呈强烈负相关。这些结果表明，除了植被斑块的特征外，植被斑块的空间分布对城市地表温度也有很大的影响，在城市生态环境管理中应予以考虑。
It is well known that vegetation has cooling effect on urban land surface temperature (ULST). However, the influence of vegetation's structure, component, and spatial distribution on ULST has rarely been quantitatively studied. This paper, taking Landsat ETM+ data to retrieve ULST, and IKONOS data to obtain vegetation information, studied the relationship between ULST and vegetation patches. Results showed that in the urban environment, (1) ULSTs over tree and shrub, lawn, and weed patches were not much different, because of the edge effects of the vegetation patches and their fragmentized distribution pattern; (2) the relationship between ULST and area, perimeter, and shape index of vegetation patches exhibited positive, while LST and the ratio of perimeter/area presented negative linear relationship; (3) using land use polygons as units, area density had quadratic curve relationship to ULST, edge density and mean area density, had strongly negative relationship to ULST. These results indicated that not only the characteristics of vegetation patches, but also their spatial distribution had a great effect on ULST, which should be considered in urban ecological environment management.