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冰川冻土  2012 

天山乌鲁木齐河源1号冰川1959-2009年物质平衡变化过程及特征研究

, PP. 1301-1309

Keywords: 1号冰川,物质平衡,平衡线,纯消融量

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Abstract:

以天山乌鲁木齐河源1号冰川1958/1959—2008/2009年度物质平衡资料为基础,研究了冰川的物质平衡变化过程及特征.结果表明51a来1号冰川物质平衡经历了9次负平衡波动和9次正平衡波动,负平衡年与正平衡年之比为35∶16,负平衡年平均物质平衡-450mm,正平衡年平均物质平衡130mm,多年平均物质平衡-267mm.1997—2008年,该冰川连续12a的物质平衡观测结果均为负平衡年,并且总体上处于数值很大的强负平衡,直至2008年出现了历史上最大的负平衡,物质平衡量为-999mm.1959—2009年,累积亏损达-13646mm(约-2402.6×104m3),即冰川平均较之1959年减薄了15.2m,这种长时期连续物质亏损状态对1号冰川是一个严峻的考验.

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