Trend and Evolvement Characteristics of Temperature in Recent 48 Years in Xinjiang

Eighty-nine meteorological stations data from 1961 to 2008 in Xinjiang is used to analyze the trend and variation characteristics of temperature in Xinjiang. The results show that the annual average temperature has consistently and significantly increasing trend,the linear warming trend is the most significant in autumn and winter. The average temperature in spring,summer and autumn after the 1980s presented an upward trend year after year,especially most obvious since the 21st century,and the temperature in spring and summer was significantly higher than in autumn. But the situation in winter was opposite,the winter temperature from 2001 to 2008 dropped 0.3 ℃ and 0.5 ℃ compared with that in the 1990s in the northern and southern Xinjiang,while increased 0.3 ℃ in Tianshan region. The annual average temperature,annual average maximum temperature and annual minimum temperature presented regional consistent variation with warming rate larger in north,eastern and western region and mountain area,smaller in south,central and plain region. Annual average maximum temperature increased from the 1980s,but annual average temperature ascended from the 1960s,and its warming rate was much higher than that of annual average maximum temperature.