中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Estimation of urbanization bias in observed surface temperature change in China from 1980 to 2009 using satellite land-use data

文献类型:SCI/SSCI论文

作者Wang F.
发表日期2012
关键词urbanization urban land-use change UHI effect urban heat-island air-temperature united-states time-series climate impact trends growth model
英文摘要Since the 1980s, China has undergone rapid urbanization. Meanwhile, the climate has been warming substantially. In this paper, the urbanization effect on observed temperatures from 1980 to 2009 in China is estimated, based on analysis of urban land use from satellite observation. Urban land-use expansion (Delta U) during 1980-2005 is applied as an urbanization index. According to these Delta U values, stations are divided into three categories: (C1) intense urbanization around the stations; (C2) moderate urbanization around the stations; and (C3) minimal urbanization around the stations. Most C1 stations are in municipalities or provincial capitals, while C2 stations tend to be in prefecture-level cities. C3 stations are mostly in counties. The urban heat island (UHI) effect can be estimated if the urban effect on C3 is negligible. The warming of C1 or C2 relative to that of C3 represents their urbanization effects, assuming that the same larger-scale natural warming has affected each category. For C1, the local urbanization effect is 0.258A degrees C/10 a over 1980-2009, accounting for 41% of the total warming; the trend at C2 is 0.099A degrees C/10 a, or 21%. For all China, the urbanization effect is 0.09A degrees C/10a, accounting for 20% of the total national warming. Winter urban warming is greater than in summer. The assumption of negligible urbanization effect on C3 is debatable, and so the true urbanization effect may equal or slightly exceed estimates. Further, the Delta U index may have some uncertainties, for it is only one of the urbanization indices. However, it provides a new and direct estimation of environmental change, in contrast to indirect indices.
出处Chinese Science Bulletin
57
14
1708-1715
收录类别SCI
语种英语
ISSN号1001-6538
源URL[http://ir.igsnrr.ac.cn/handle/311030/26783]  
专题地理科学与资源研究所_历年回溯文献
推荐引用方式
GB/T 7714
Wang F.. Estimation of urbanization bias in observed surface temperature change in China from 1980 to 2009 using satellite land-use data. 2012.

入库方式: OAI收割

来源:地理科学与资源研究所

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