呼伦贝尔市1961-2013年气温变化特征

利用呼伦贝尔市1961-2013年16个气象台站53年逐月平均最高气温、最低气温及气温日较差资料，采用显著性检验方法对该地区逐月平均最高、最低气温及气温日较差的变化趋势进行研究。结果表明：逐月最高气温的变化趋势除了1月和12月部分台站呈下降趋势外，各站其它月份平均最高气温都呈上升趋势，其中5、7、8、9月的上升趋势显著，最显著是8月，绝大多数台站通过了0.001显著性检验；逐月最低气温的变化趋势除了1月的满洲里、额尔古纳的变化趋势为下降外，各站其余月份变化趋势均为上升，且除了1、2月和12月的西部几个台站不显著外，大多数台站各月都通过了0.01显著性检验，其中3、4、5、6月最显著，均通过了0.001显著性检验；平均气温日较差的变化趋势12月中除了8月和9月的大部分台站的变化趋势为上升，绝大多数台站其余月份变化趋势为下降。在全球气候变暖的背景下，呼伦贝尔市各地各月最低气温的上升趋势比最高气温更明显，变化率平均约高出0.20-0.40℃·（10a）-1之间；气温日较差变化趋势显著减小，是最低气温的升幅明显高于最高气温所致；全市各站各月的气温日较差均在11-17℃之间，其中北部以及东部台站较大，在15-17℃之间，其余地区在11-13℃之间。

The Variation Characteristics of Climate Change of Hulunbuir in 1961-2013

Based on data of monthly average maximum temperature, minimum temperature and daily temperature range of Hulunbuir for 53 years from 1961 to 2013,using of method of test of significance, the change trend of monthly average maximum temperature, minimum temperature and daily temperature range in the area were researched. The results showed that： the monthly maximum temperature of every stations showed a increased trend except some stations showed a downward trend in January and December, and there was a significant upward trend in 5,7,8,9 months, the most significant in August and through the significance test of 0.001 in vast majority of stations; The monthly minimum temperature of every stations showed a increased trend except Manzhouli and Eerguna showed a downward trend in January, and the most stations each month through the significance test of 0.01 in addition to several western stations was not significant in1,2and 12 months, the most significant in3,4,5 and 6 months through the significance test of 0.001.The average diurnal temperature range showed a downward trend at most stations in other months of the year except that most stations was increasing trend in 8 and 9 months. Under the background of global climate warming, the monthly minimum temperature rise around is more obvious than the maximum temperature in Hulunbuir, the average rate of change was 0.20-0.40℃, （10a）-1; The diurnal change trend of temperature was decreased because that the minimum temperature increase was significantly higher than that of the highest temperature; The diurnal temperature range were between 11-17℃,it is larger in the north and east station in between 15-17℃,the rest area is 11-13℃.