锡林郭勒草原区气温的时空变化特征  

The spatial-temporal change variations of temperature in Xilinguole steppe zone

作　　者：王海梅[1,2] 李政海[2] 乌兰 杨俊玲[3] 

机构地区：[1]内蒙古自治区气象科学研究所,呼和浩特010051 [2]大连民族学院环境与资源学院,大连116600 [3]吉林省吉林市气象局,吉林132013

出　　处：《生态学报》2011年第24期7511-7515,共5页Acta Ecologica Sinica

基　　金：国家自然科学基金资助项目(30970494;40765006);国家环保公益性行业科研专项(201109025)

摘　　要：以锡林郭勒盟15个气象站点1981—2007年的气温数据为基础,对气温的时空变化特征进行分析。研究结果表明:以年代为时间单位分析,自1981年以来,锡林郭勒草原区气温一直处于上升通道之中,进人21世纪以后,气温上升趋势进一步增强,≥4℃的区域由西南向东北方向显著扩张,<3—4℃的气温区间由原来面积较小的区片扩张为东西相互连通的大面积分布;基于像元水平的分析表明,整个锡林郭勒盟的年平均气温均呈现升高的趋势,平均气温的年变率在空间分布上呈现条带状,自西向东递减。Based on the temperature data of 15 weather stations in Xilinguole steppe zone,we got the monthly spatial temperature data with interpolation techniques under the Arcgis software,and analyzed the spatial-temporal change variations of temperature.The results showed that,in the 80s of 20th century,the temperature of the largest area zone is of 1—2 ℃ and 2—3℃ temperature zone were the largest,the proportionthe area were 34.64%,33.26%,respectively.But while in the 90s of 20th century,the temperature of the largest area zone were the 2—3℃ and 3—4℃,the area which accounted for were 32.99% and 26.46%,respectively.During this period,the proportion of the average temperature which in the range of 1—2℃ is only 16.83%.From the 21st century,the temperature of the whole region showed a rapid increased trend,the annual average temperature of most areas were 3—4℃ and 4℃,the area were which accouted for 33.93% and 33.14% of Xilinguole′s total area separately,respectively,but however,the area that the average temperature indicated of 2℃ was no more than 7%.The analysis on the temperature change trends figures from 1981 to 2007 showed that,the annual average temperature of the whole region showed presented an increased ascending tendencytrend.The annual average temperature change rate showed that it displayed the zonal distribution in space,and decreased from west to east,the relatively higher change rate region was located in the west and the north of Xilinguole,and the maximum value of change rate was 1.28,the proportion of the annual change rate which greater than 0.8 was 52.5 0%,the relatively lower change rate region was located in the east and the south of Xilinguole,and the minimum value of the average annual growth of change rate was 0.12,the area of the annual change rate which below 0.7 was only 9.88%.The analysis above showed that,the under the background of global climate change,since 1981,the annual average temperature of Xilinguole showed exhibited an obvious increased trend upward trend

关 键 词：锡林郭勒草原区 气温 时空变化 

分 类 号：S812.1[农业科学—草业科学]