| 上海市人类活动对热环境的影响 |
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| 引用本文： | 岳文泽,徐建华.上海市人类活动对热环境的影响[J].地理学报,2008,63(3):247-256. |
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| 作者姓名： | 岳文泽 徐建华 |
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| 作者单位： | 1. 浙江大学土地管理系, 杭州310029;
2. 华东师范大学地理系, 教育部地理信息科学重点实验室, 上海200062 |
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| 摘 要： | 随着城市规模不断扩张, 由城市热岛现象而导致的热环境问题不断凸现。城市热环境 的时空变化, 是下垫面改变、人为热释放和环境污染等人类活动因素相互交织作用的结果。 由于城市热环境影响因子的复杂性, 传统观测手段和统计方法在获取数据和分析人类活动对 热环境响应机制方面存在着局限性。而卫星遥感和GIS 技术为人类活动对城市热环境的影响 分析提供了技术支撑。选用Landsat ETM+ 影像, 以上海市外环内区域为研究靶区, 在探讨热 环境的空间格局基础上, 运用空间主成分分析方法替代传统的多准则判断(MCE) 方法, 分析 了人类活动对城市热环境的影响特征。结果发现, 对于上海主城区而言, 城市建筑与人口密 度、工业区布局、下垫面类型以及城市景观多样性四个因子是影响城市热环境空间格局的主 导因子; 四个因子的线性模型, 较好地模拟了热环境的空间变化, 定量揭示了上海城市人类活动对热环境的影响机制。
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| 关 键 词： | 城市热环境 影响因子 主成分分析 上海 |
| 收稿时间： | 2007-07-11 |
| 修稿时间： | 2007年7月11日 |
Impact of Human Activities on Urban Thermal Environment in Shanghai |
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| YUE Wen-ze,XU Jian-hua.Impact of Human Activities on Urban Thermal Environment in Shanghai[J].Acta Geographica Sinica,2008,63(3):247-256. |
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| Authors: | YUE Wen-ze XU Jian-hua |
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| Institution: | 1. Department of Land Management, Zhejiang University, Hangzhou 310029, China;
2. The Key Lab of GIScience of the Ministry of Education, Dept. of Geography, East China Normal University, Shanghai 200062, China |
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| Abstract: | The urban thermal environment effect resulted from urban heat island phenomena becomes prominent with the rapid urban expansion, which had adverse effect on the urban environment and the urban sustainable development. Spatial-temporal change of urban thermal environment is relevant to interactions of human activities such as the change of underlying surface, anthropogenic heat emission and environmental pollution. Due to the complexity of factors contributing to urban thermal environment, the routine observing methods and statistical methods are insufficient in acquiring data and analyzing the responses of human activities to thermal environment, especially discerning the major attributors from the others. Fortunately, the remote sensing and GIS can resolve the technical problem effectively, which can quantitatively explore the relationship of spatial-temporal change of thermal environment with human activities. Based on Landsat ETM images and taking the urban area inside the ring road of Shanghai as a case study, this paper employed Spatial Principal Component Analysis (PCA) method to analyze the spatial pattern and the influencing factors of urban thermal environment as a substitute of Multi-Criterion Evaluation (MCE) method. The results showed that urban construction density and population density, allocation of industries, types of underlying surface and diversity of urban landscape were the leading factors contributing to the urban thermal environment in the metropolitan area of Shanghai. The linear model including the four independent variables could reveal the response mechanism of human activities on thermal environment in Shanghai. From the model, urban building density and population aggregation were regarded as the most sensitive factors to thermal environment among these factors. Furthermore, the difference in spatial distributions of the main factors formation of the diverse urban thermal environment in different areas. The results would be of value to simulate spatial change of urban thermal environment and even put forward countermeasures to lessen the urban thermal environment intensity for policy makers. |
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| Keywords: | urban thermal environment factors Principal Component Analysis Shanghai |
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