Impact of Urbanization on Regional Temperature Change in the Yangtze River Delta
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℃/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℃ from 1961 to 2005 and 0.047℃ from 1991 to 2005, and the annual maximum air temperature increased 0.162℃ and 0.083℃ 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.
Yangtze River Deltaurban heat islandmega cityurbanization process
NETL
NSTL
万方数据
维普
