Impact of Urbanization on Regional Temper atur e Change in the Yangtze River Delta

  • 1. Jiangsu Institute of Meteorological Sciences, Nanjing 210008, China;
    2. Department of Atmospheric Sciences, Nanjing University, Nanjing 210093, China;
    3. Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008, China

Received date: 2007-02-08

  Revised date: 2007-05-09

  Online published: 2007-07-25

Supported by

Concentrated fund item of national science and technology foundation work, No.2005DKA31700-06-20; Jiangsu Natural Science Foundation, No.BK2005163; Special Fund from China Meteorological Administration, No.CCSF2006-32


Based on non-radiance-calibrated DMSP/OLS nighttime light imagery from 1992 to 2003, urban land area statistical data, meteorological data and land surface temperature data retrieved by MODIS and NOAA/AVHRR data, the influence of urbanization on regional climate trend of temperature in the Yangtze River Delta was analyzed. Conclusions are as follows: (1) There is a significant urbanization process from 1992 to 2003 in the Yangtze River Delta, and the annual mean air temperature increased at a rate of 0.28-0.44 oC/10a in mega city. (2) The urban heat island (UHI) effect on regional mean air temperature in different seasons is summer > autumn > spring > winter. (3) The UHI intensity and the urban total population logarithm are creditable correlated. (4) The UHI effect made the regional annual mean air temperature increased 0.072 oC from 1961 to 2005 and 0.047 oC from 1991 to 2005, and the annual maximum air temperature increased 0.162 oC and 0.083 oC from 1991 to 2005, all indicating that the urban expansion in the Yangtze River Delta from 1991 to 2005 may be regarded as a serious climate signal.

Cite this article

XIE Zhiqing, DU Yin, ZENG Yan, SHI Yafeng, WU Jingang . Impact of Urbanization on Regional Temper atur e Change in the Yangtze River Delta[J]. Acta Geographica Sinica, 2007 , 62(7) : 717 -727 . DOI: 10.11821/xb200707005


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