干旱区生态环境知识资源中心(Arid): 基于空间PCA的兰州市热环境人文驱动因素分析

Arid

	基于空间PCA的兰州市热环境人文驱动因素分析
其他题名	Simulation and analysis of human dimensions of urban thermal environment in valley-city:a case study of Lanzhou City
	潘竞虎; 李宝娟
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2011
卷号	34 期号:4 页码:662-670
中文摘要	在城市化过程中,人类社会、经济活动的加剧使城市地表热力景观呈现出高度的空间异质性。目前对城市热环境形成、演变的驱动机制、热岛效应与地表覆被变化的定量关系研究大多还是从对某些影响因子的测定入手,缺乏对区域热环境系统全面、综合的评价与分析。利用多源空间数据,以干旱区河谷型城市兰州为研究对象,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方法,分析了人类活动对城市热环境的影响特征。结果表明:兰州市人类活动对热环境的影响因子可以归纳为4种相对独立的基本要素；即景观格局、工业布局、城市建筑以及地表覆盖。影响兰州市中心城区热环境的最核心要素是景规格局,四个因子的线性模型较好地模拟了热环境的空间变化,定量揭示了兰州中心城区人类活动对热环境的影响机制。
英文摘要	Urbanization is followed with a series of physical,ecological and social processes.The formation and evolution of urban thermal environment,which are closely related to changes of land cover and socioeconomic activities of human being in urban area,can generalize and embody urban ecological environment condition.Distribution and evolution 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.Existing research efforts on the driving mechanism of urban thermal formation and evolution have been mostly focused on the measurement of a single or several indicators representing land cover changes,socioeconomic conditions,etc.There is still lack of a comprehensive analysis with respect to surface thermal environment system from a regional perspective.In the recent fifty years,urbanization of Lanzhou City,Gansu Province is in a quick increasing period.Comparing to the plain cities,Lanzhou’s integrated effects include the artificial and original influence factors bringing about the prominent and particular hot island effects.So it is necessary to research on the temporal-spatial characteristics and formation mechanisms of thermal environment in Lanzhou.Based on Landsat TM images and taking the arid valley urban area of Lanzhou as a case study,this paper employed Spatial Principal Component Analysis(SPCA)method to analyze the spatial pattern and the influencing factors of urban thermal environment as a substitute of Multi-Criterion valuation (MCE)method.Several conclusions have been drawn as follows:There are four primary factors to influence the density and spatial pattern of urban environment in Lanzhou,which can be generalized as landscape pattern,allocation of industries,urban construction density and types of underlying surface.The cumulative variance contribution rate of the first four principal components is 91.27%.It is dissimilar in the formation mechanism of thermal environment among all the zones through comparing four principle components.The linear model including the four independent variables could reveal the response mechanism of human activities on thermal environment in Lanzhou.Differing from other cities,landscape pattern is regarded as the most sensitive factors to Lanzhou’s thermal environment among these factors,whose variance contribution was up to 48.42%.Furthermore,the difference in.spatial distribution of the main factors facilitates the formation of the diverse urban thermal environment in different areas.The results would be valuable to simulate spatial change of urban thermal environment and even put forward countermeasures to lessen the urban thermal environment intensity for policy makers,at the same time can also support the decision for urban planning,urban constructing,environment protecting and regional sustainable development in Lanzhou city.
中文关键词	城市热环境 ; 人文影响因素 ; 空间主成分分析 ; 干旱河谷型城市 ; 兰州
英文关键词	urban thermal environment human dimensions spatial principal component analysis arid valley-city Lanzhou City
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:4271788
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226471
作者单位	西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	潘竞虎,李宝娟. 基于空间PCA的兰州市热环境人文驱动因素分析[J]. 西北师范大学,2011,34(4):662-670.
APA	潘竞虎,&李宝娟.(2011).基于空间PCA的兰州市热环境人文驱动因素分析.干旱区地理,34(4),662-670.
MLA	潘竞虎,et al."基于空间PCA的兰州市热环境人文驱动因素分析".干旱区地理 34.4(2011):662-670.