1958—2017年5—9月典型草原区生长季浅层地温变化特征

Analysis of the variation Characteristics of shallow Ground temperature in typical Grassland Growing season from May to september, 1958-2017

文章选取锡林浩特国家基准气候站1958—2017年5—9月0、5、10、15、20cm逐日平均地温资料,利用线性倾向估计、相关分析等数理统计方法,分析各层地温的变化特征及趋势。结果表明:各层平均地温均呈显著的升温趋势,升温幅度依次为0.476、0.365、0.331、0.333、0.301℃/10a,其中,2001年各层地温上升最为明显;从各层地温的年内变化规律看,在7月达到最高,9月份相差甚微;各层地温与气温之间存在极显著的相关性,其中,0cm地温和气温的相关性最高,各层地温与降水呈负相关。

This paper calculate the change and tendency of average soil temperature of 0, 5, 10, 15, 20cm in growing season byusing linear trend method and correlation analysis, based on the data of average soil temperature in xilinhot from May to Septemberof 1958-2017 .The result shows the average soil temperature of each layer dramatically increase, and each layer rise 0.476, 0.365,0.331, 0.333, 0.301℃ /10a respectively. The ground temperature of each layer rises most obviously in 2001.The highest differencebetween each layer was in July and a little difference in September. There is a very significant correlation between soil temperatureand temperature. Among them, the 0cm soil temperature has the highest correlation with the temperature, and the temperature of eachlayer is negatively correlated with precipitation.