【摘要】 为了进一步研究在气候变暖情况下土壤封解冻的变化规律,本研究应用山西东南部11个气象观测站近40年气温、平均冻土深度、最大冻土深度、浅层(5~20 cm)冻土封解冻资料,采用统计对比聚类法,分析了气候变暖与冻土的气候变化特征。结果显示:山西东南部气候变暖较为明显,年际线性趋势增温率为0.3℃/10 a,增温贡献最大为冬季。随着冬季气候的变暖,平均冻土深度与最大冻土深度均趋向变浅。在冬春、秋冬2个转换期气候变暖的前提下,浅层冻土的平均冻结终日与始日分别显现出提前和推后,意味着浅层土壤封冻期的缩短。更多还原

【Abstract】 In order to further study the climate warming, soil sealing of thawing, according to the data oftemperature, average frozen depths, maximum frozen depths and shallow(5- 20 cm) permafrost thaw of 11 meteorological stations in recent 40 years in southeastern Shanxi, the authors used the statistical comparisonclustering method to analyze the characteristics of climate warming and climate change of frozen soil. Theresult showed: the climate warming was evident in southeast Shanxi Province, linear trend of annual increasingrate was 0.3 ℃/10 a, the maximum contribution of warming was winter. As winter climate warming, averagefrozen depth and maximum frozen depth tended to be decreased. Under the premise of climate warming inwinter-spring and autumn-winter, the average freeze ending date and the beginning date of shallow soils wereadvanced and pushed back respectively, indicated that the shallow soil freezing period was shortening.更多还原