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本文对同德气象站50a来冬季冻土层的变化作了深入的分析,结果表明,当地多年平均冻土层呈递减趋势,其中,1987年~2006年递减趋势最为明显。通过对影响冻土层变化的气象因子进行统计分析,指出气温是影响冻土层变化的首要因子,由于气温存在升高的趋势,导致冻土层必然呈下降状态。
In this paper, the changes of the winter frozen soil layer over the past 50 years at Tongde weather station are analyzed in depth. The results show that the local average frozen soil layer shows a decreasing trend over the past 50 years, of which the decreasing trend is most obvious from 1987 to 2006. Through the statistical analysis of the meteorological factors that affect the change of permafrost, it is pointed out that temperature is the primary factor that affects the change of permafrost. As the temperature increases, the permafrost will inevitably decline.