Climate Change Research ›› 2017, Vol. 13 ›› Issue (5): 456-464.doi: 10.12006/j.issn.1673-1719.2016.226

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Urbanization Effects on the Observed Temperature of Two Meteorological Stations in Changsha City

Jin Kai1, Wang Fei1,2,3, Gou Jiaojiao2,3   

  1. 1 Institute of Soil and Water Conservation, Northwest A & F University, Yangling 712100, China;
    2 Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China;
    3 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-11-18 Revised:2017-01-09 Online:2017-09-30 Published:2017-09-30


The daily data of temperature, wind direction and wind speed during 2007-2009 of the two meteorological stations located in the east and west regions of Changsha city, as well as the land cover dataset, were analyzed for better understanding of the impact of urbanization on the temperature records of meteorological stations close to city. The differences of climatic factors between the two stations were contrastively analyzed and the urban biases of temperature data were estimated by using the modified urban impact indicators. The results showed that the monthly mean temperature (Tmean), mean maximum temperature (Tmax) and mean minimum temperature (Tmin) at two stations differed greatly, and the largest difference were up to 0.90℃, 0.83℃ and 1.34℃, respectively. As influenced by urban area and wind directions, significant difference of monthly urban impact indicator (△K) between the two stations was observed, and the average K of East station and West station were 2.01 and 1.50, respectively. There was seasonal variation of the K at each station, and the △K and △T of two stations were positively and significantly correlated. The largest urban warming in Tmean of East station and West station were observed in 2007, which were up to 0.63℃ and 0.45℃, respectively. It is necessary to adjust the temperature data when analyzing the long-term climate change and using station records to analyze the spatial change of climate because the temperature records of meteorological stations near cities were significantly influenced by urban size, wind direction and wind speed.

Key words: Changsha city, urbanization, meteorological station, temperature, urban warming

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