锡林郭勒草原东南部近60年的气温变化特征——以多伦县为例

Temperature Variation Characteristics in the Southeast of Xilinguole Grassland in Recent 60 Years——Taking Duolun County as an Example

选取内蒙古多伦县1953～2012年的气温资料,利用线性倾向估计、相关分析等方法重点分析了近60年来多伦县平均气温、极端气温和平均最高(最低)气温的变化特征及趋势。结果表明:多伦县气温呈明显上升趋势,年平均气温倾向率为0.39℃/10a,冬季和2月的平均气温增温最为显著,对年平均气温上升的贡献率最大;年、季极端最低气温较极端最高气温升温趋势明显,月极端最低气温以3月增温最为突出,倾向率为1.27℃/10a;平均最高(最低)气温均以冬季和2月增温速率最快,年、季、月平均最低气温较平均最高气温升温趋势明显。

Selected the temperature data of Duolun County during 1953~2012,utilizing the mathematical statistics and correlation analysis and using linear trend estimate,the mean temperature,extreme temperature,and mean maximum（minimum） temperature variation characteristics and trend of the past 60 years in Duolun County were analyzed.The results showed that the Duolun County＇s temperature showed a distinctly rising trend,the annual mean temperature tendency rate was 0.39℃/10a,the rising of the mean temperature in winter and February was the most significant,it is the most important factor of the rising mean temperature;the extreme minimum temperature was rising more distinctly than maximum temperature,monthly minimum temperature in March was the most prominent,tendency rate was 1.27℃/10a;the rising rate of mean maximum（minimum） temperature in winter and February was the most significant,the mean minimum temperature was rising more distinctly than mean maximum temperature.