近55 a佳木斯地区最大冻土深度变化特征及其影响因子的分析

Analysis of the characteristics of maximum frozen soil depth and its influencing factors in Jiamusi area in the past 55 years

利用1961-2010年佳木斯、富锦2个代表站55 a的最大冻土深度及影响冻土的降雪、冬季温度等资料,采用气候趋势系数和气候倾向率的方法,对1961年以来佳木斯地区最大冻土深度变化进行了分析。结果表明,佳木斯地区最大冻土深度年际变化呈减小趋势,西部减小趋势明显大于东部;影响最大冻土深度变化的主要因子是最大积雪深度和冬季平均降水量,而且两者是呈负相关,相关系数通过信度为0.001的显著性检验。

Based on the maximum permafrost depths, snowfall and winter temperature data of Jiamusi and Fujin 2 representative stations from 1961 to 2010, using the climatic trend coefficient and climate tendency method to analyze the maximum permafrost depth change in Jiamusi region. The results show that, the interannual variability of the permafrost depth in Jiamusi area is decreasing, and the decreasing trend in the west is obviously larger than that in the east. The main factors affecting the maximum permafrost depth change are the maximum snow depth and the winter average precipitation, and the two are negatively correlated, The correlation coefficient through the reliability of 0.001 significant test.