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冰川冻土  2013 

新疆区域近50a积雪变化特征分析

DOI: 10.7522/j.issn.1000-0240.2013.0090, PP. 793-800

Keywords: 积雪日数,积雪深度,降水,气温

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Abstract:

利用新疆91个气象台站1960-2011年的观测资料,对南北疆及天山山区冬春年(10月-翌年5月)的积雪日数、最大积雪深度、积雪初始、终止日期等因子进行了统计分析,并通过Kringing插值计算了新疆区域平均最大积雪深度的空间分布.结果表明新疆冬春季积雪主要分布在天山以北,厚度可达30cm以上,天山以南积雪比较浅薄,大部分在10cm以下;50a来,南北疆及天山山区的积雪深度均呈小幅增长(天山山区增幅最大),积雪日数呈略微降低趋势,积雪初始、终止日期无明显变化.天山山区的积雪变化与北疆有较高的相关性,它们积雪深度和积雪日数的相关系数分别达0.708和0.614,南疆积雪变化与它们几乎没有相关性;积雪深度与冬春年降水量的变化均有很好的一致性,尤其在北疆,二者相关系数高达0.702,但与平均温度呈低的负相关;积雪日数与冬春年降水量变化没有明显相关关系,但均与气温呈较好的负相关,在北疆二者的相关系数达-0.742.

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