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Remote Sensing Technology and Application  2011, Vol. 26 Issue (2): 156-162    DOI: 10.11873/j.issn.1004-0323.2011.2.156
article     
Study of Thermal Environment of Hefei City based on TM and GIS
SHI Tao1,YANG Yuan-jian2,3,4,ZHANG Ai-min1,2,3,4,JIANG Yue-lin1,XUN Shang-pei2,3,4,ZHANG Hong-qun2,3,4
(1.Resource and Environment College,Anhui Agricultural University,Hefei 230036,China;
2.Anhui Institute of Meteorological Sciences,Hefei 230031,China;3.Key Laboratory of Atmospheric
Sciences and Satellite Remote Sensing of Anhui Province,Hefei 230031,China;4.Joint Laboratory of
Impact Assessment of Agrometeorological Disasters and Risk Transfer,Hefei 230031,China)
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Abstract  

Based on TM data,the land surface temperature (LST) and normalized difference vegetation index (NDVI) on 5th October 2007 were retrieved quantificationally in this paper.Besides,along with the theory of fractal dimension of urban form and GIS technology,the spatial pattern of thermal environment and the relationship between land use type change and their corresponding thermal environment classes in Hefei region were analyzed.The results suggested that:the intensity of urban heat island (UHI) in Hefei was relative stronger (weaker) in southeast (northwest) area,and the core of UHI did not arise in central Hefei city.The LST has a significant linear\|negative correlation with NDVI (the correlation coefficient is -0.734),the LST would decreased 0.93℃ correspondingly if NDVI increased 0.1.The weighted heat effect index (WHI) of urban area is 1.14,which made the strongest positive effects on UHI of Hefei; while the WHI of farmland is 0.51,which made the strongest negative effects on UHI of Hefei.These results indicated that the farmland may play a critical role in all kinds of thermal environment classes.This work provided some scientific basis for reduction of UHI effect in Hefei.

Key words:  Urban heat island      Land use      Land surface temperature      Thermal environment classes      Hefei     
Received:  09 October 2010      Published:  25 July 2011
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DAN Chao
YANG Yuan-Jian
ZHANG Ai-Min
JIANG Ti-Lin
XUN Chang-Pei
ZHANG Hong-Qun

Cite this article: 

SHI Tao,YANG Yuan-jian,ZHANG Ai-min,JIANG Yue-lin,XUN Shang-pei,ZHANG Hong-qun. Study of Thermal Environment of Hefei City based on TM and GIS. Remote Sensing Technology and Application, 2011, 26(2): 156-162.

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http://www.rsta.ac.cn/EN/10.11873/j.issn.1004-0323.2011.2.156     OR     http://www.rsta.ac.cn/EN/Y2011/V26/I2/156

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