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乌鲁木齐河源1号冰川雪坑δ18O剖面特征与气候的关系

, PP. 950-956

Keywords: 冰川雪坑,氧同位素,干季,湿季,气候,1号冰川,乌鲁木齐河

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Abstract:

004年10月至2005年9月,在天山乌鲁木齐河源1号冰川积累区采集了16组雪坑样品。利用雪坑中δ18O资料,分析干季和湿季冰川雪坑δ18O剖面特征与气候的关系。结果表明δ18O变化主要集中在雪坑上部,在距底部附加冰130cm以下变化不大,且维持在较高值。其中,干季雪层剖面上部基本反映了积累期温度的变化,湿季不同雪层之间的同位素差异变小,峰值削弱,反映了同位素分馏在干湿季的不同作用,体现了同位素后沉积作用的富集与均质化效应的季节差异。

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