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《Progress in Geography》 2009-04
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The Spatio-temporal Characteristics of Temperature Change in Recent 57 Years in Northern China

WANG Haijun1,2,ZHANG Bo1,ZHAO Chuanyan2,JIN Xiaohua3,WANG Xingmei1,DAI Shengpei1,WANG Yamin1,KANG Shuyuan1,LIU Yanyan1,LI Dan1(1.The College of Geography and Environmental Science,Northwest Normal University,Lanzhou 730070,China;2.Key Laboratory of Arid and Grassland Agroecology of Ministry of Education,Lanzhou 730070,China;3.The College of Geography Science,Inner Mongolia Normal University,Hohhot 010022,China)  
This paper analyzes the temporal and spatial characteristics of the temperature variation in recent 57 years in northern China,combining with GIS spatial analysis techniques and mathematical statistical theory to analyze the quantitative variation of temperature in northern China and illuminate the evolution of the spatial and temporal change of temperature.The results showed that the changing trend of temperature was an overall upward,and the trend was remarkable with a rate of 0.25℃/10a in the northeastern region(NE) and 0.12℃/10a in the eastern part of the northwestern region(NW).The changes among the January,July and annual mean temperature were not symmetrical,the annual mean temperature was ascending because January temperature plays a critical role,the trend of temperature ascending in July was not distinct in each region;there was the phenomenon of abrupt change in the annual mean temperature in northern China,it occurred in the NE region in 1994a(a=0.05),northern region in 1997a(a=0.05) and the NW region in 1996a(a=0.05);the periodicity of mean temperature was distinct,the first main period was 21a,the second was 6a and the third was 11a in the NE region,it was 22a in northern China and 12a in the west of NW region,there were three periods in the west of NW region,being 15a,8a and 5.5a;there was a consistency in variations of the temperatures in every region of northern China.The correlation was 0.79(a=0.01) between NE and northern China,it was 0.19 and 0.26 between NE and northern China in January,and 0.26 between NE and part of NW in July,and they were not remarkable.
【Fund】: 中国科学院知识创新工程重要方向项目(KZCX2-YWQ10-4);; 国家自然科学基金项目(40671067 30770387)
【CateGory Index】: P467
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