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《Ecology and Environmental Sciences》 2010-03
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The climate impact of urbanization in Tianjin city

LIU Deyi1,HUANG He2,YANG Yanjuan1,FU Ning3 1.Tianjin Climate Center,Tianjin 300074,China;2.Tianjin Meteorology Institute,Tianjin 300061,China;3.Civil Aviation University of China,Tianjin 300300,China  
In this paper,the climate impact of urbanization in Tianjin city is analyzed with nearly 50 years observations,such as surface temperature,radiation,sunshine,wind speed,relative humidity and precipitation,from two weather stations.Results show the impact is remarkable.Subject to the effects of urbanization,the surface temperature in urban is much higher than suburban.The ur-ban heat island effect is obviously.Urban warming rate is 0.42 degree per ten years,and the increased range of the temperature reach to 2.5 degree in the last 50 years.The warming effect caused by urbanization are further proved by decreasing of surface total radiation,direct radiation and sunshine duration;Both the surface layer wind speed and relative humidity in urban,where the decrease rate is 0.3 m·s-1 and 1.11% per ten years,are less than that in suburban.In the last 50 years,the precipitation and the days of precipitation decreased significantly,the tendencies are 5.91 mm and 3.2 d per ten years separately.
【Fund】: 天津市自然科学基金项目(08GCYBGC10200);; 中国气象局北京城市气象研究所2008年度城市气象科学研究基金项目(UMRF200806);; 天津市塘沽科技兴区计划项目(2008XQ13-03);; 中国民航大学校内基金项目(09CAUC-E02)
【CateGory Index】: X16
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