内蒙古阿里河地区近30年冻土变化特征分析

Analysis on Variation of Permafrost in the Past 30 Years in Alihe Region of Inner Mongolia

利用1981—2010年内蒙古鄂伦春自治旗气象局常规观测资料,分析了内蒙古鄂伦春自治旗阿里河地区冻土深度的变化及其与气候变化的关系。结果表明,近30年期间阿里河地区的冻土深度呈逐渐增加趋势,趋势率为7.23 cm/10年;终止日期提前趋势程度大于起始日期提前程度,表明冻土期将变短。冻土深度的变化与雪深、气温和降水的变化均呈负相关。

Based on the general observation data collected by meteorology bureau of Oroqen Autonomous Banner of Inner Mongolia from 1981 to 2010, the association of permafrost depth variation with climate changes in Alihe region of Oroqen Autonomous Banner of Inner Mongolia was assessed. The results showed that in the past 30 years, the permafrost depth in this region exhibited an increasing trend with the rate of 7.23 cm per 10 years; the degree of early trend of the end date was greater than that of start date, indicating the permafrost period would get shorter. The variation of permafrost depth was negatively correlated with the changes of snow depth, temperature and precipitation.