Effects of Urbanization on Extreme Warmest Night Temperatures During Summer near Bohai

+ Author Affiliations + Find other works by these authors
  • Funds:

    Supported by: the State Key Development Program of Basic Research of China (2010CB951600), the National Science and Technology Supporting Plan of the Twelfth Five-Year (2012BAC22B05), National Natural Science Foundation of China (40605021),China Meteorological Administration Special Foundation for Climate Change (CCSF201224).

  • doi: 10.1007/s13351-013-0602-0

PDF

  • Many previous studies have focused on the impacts of urbanization on regional mean temperatures. Relatively few have analyzed changes in extreme temperatures. Here, we examine the impact of urbanization on extreme warmest night temperatures from 33 stations in the Bohai area between 1958 and 2009. We compute the Generalized Extreme Value (GEV) distribution of extreme warmest night temperatures and analyze long-term variations in its characteristic parameters. A new classification method based on the factor analysis of changes in extreme night temperatures is developed to detect the effects of urbanization in different cities. Of the three parameters that characterize the GEV distribution, the position parameter is the most representative of long-term changes in extreme warmest night temperatures. During the period of rapid urbanization (i.e., after 1978), all three parameters of the GEV distribution are larger for the urban station group than for the reference station group, so are the magnitudes of their variations, and the urban areas have been experiencing higher extreme warmest night temperatures with larger variability. Different types of cities in the Bohai area have all experienced an urban heat island effect, with an average urbanization effect of approximately 0.3℃ per decade.
  • 加载中
  • 加载中
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Effects of Urbanization on Extreme Warmest Night Temperatures During Summer near Bohai

  • 1. National Meteorological Information Center,Beijing 100081;
    Department of Atmospheric and Oceanic Sciences,School of Physics,Peking University,Beijing 100872
Funds: Supported by: the State Key Development Program of Basic Research of China (2010CB951600), the National Science and Technology Supporting Plan of the Twelfth Five-Year (2012BAC22B05), National Natural Science Foundation of China (40605021),China Meteorological Administration Special Foundation for Climate Change (CCSF201224).

Abstract: Many previous studies have focused on the impacts of urbanization on regional mean temperatures. Relatively few have analyzed changes in extreme temperatures. Here, we examine the impact of urbanization on extreme warmest night temperatures from 33 stations in the Bohai area between 1958 and 2009. We compute the Generalized Extreme Value (GEV) distribution of extreme warmest night temperatures and analyze long-term variations in its characteristic parameters. A new classification method based on the factor analysis of changes in extreme night temperatures is developed to detect the effects of urbanization in different cities. Of the three parameters that characterize the GEV distribution, the position parameter is the most representative of long-term changes in extreme warmest night temperatures. During the period of rapid urbanization (i.e., after 1978), all three parameters of the GEV distribution are larger for the urban station group than for the reference station group, so are the magnitudes of their variations, and the urban areas have been experiencing higher extreme warmest night temperatures with larger variability. Different types of cities in the Bohai area have all experienced an urban heat island effect, with an average urbanization effect of approximately 0.3℃ per decade.

Catalog

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return