松花江流域最大冻土深度的时空分布及对气温变化的响应

发布时间：2018-02-05 03:59

  本文关键词： 最大冻土深度 变化趋势 突变 松花江流域　出处：《资源科学》2017年01期 　论文类型：期刊论文

【摘要】：利用松花江流域内及周边的56个气象站点资料,采用气候统计学分析方法,对1960-2004年松花江流域最大冻土深度的时空变化及其与气温的关系进行了分析。结果表明:流域年最大冻土深度分布整体呈由南向北增加的趋势。月最大冻土深度有明显的季节变化,最大值多出现在3月,且高纬度地区最大冻土深度均大于低纬度地区。1960-2004年松花江流域年最大冻土深度呈明显下降趋势,变化率为-8.25 cm/10a,与冻土同期的年均气温呈显著升高趋势,变化率为0.41℃/10a。年最大冻土深度在1980s中期发生突变,突变年前后最大冻土深度减小了35 cm。此外,年最大冻土深度和年均气温在时间和空间尺度上均呈显著负相关,高纬度地区最大冻土深度比低纬度地区对气候变暖的响应滞后。
[Abstract]:Using the data of 56 meteorological stations in and around the Songhua River Basin, the method of climate statistics analysis was used. The temporal and spatial variation of maximum frozen soil depth in Songhua River Basin from 1960 to 2004 and its relationship with air temperature are analyzed. The results show that:. The distribution of annual maximum frozen soil depth in the basin is increasing from south to north, and the monthly maximum permafrost depth has obvious seasonal variation. Most of the maximum occurred in March, and the maximum depth of frozen soil in the high latitude area was higher than that in the low latitude area. The annual maximum frozen soil depth of Songhua River basin in 1960-2004 showed an obvious downward trend. The change rate is -8.25 cm / 10 a, and the average annual air temperature in the same period is significantly higher than that of the frozen soil, and the change rate is 0.41 鈩，

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