藏南地区降水量变化对陆源正构烷烃单体氢稳定同位素影响初探
查看参考文献55篇
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文摘
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在藏南羊卓雍错流域的沉错和宁金岗桑冰川分别钻取了浅湖芯和冰芯，对过去80年来湖芯中记录的陆源正构烷烃单体氢稳定同位素(δD_(wax))与冰芯氢稳定同位素(δD_(ice))进行比较，发现二者具有较好的相关性(R~2=0.41，P=0.047)，显示了陆生植物叶蜡正构烷烃单体氢稳定同位素对大气降水氢稳定同位素的继承效应.但δD_(wax)与δD_(ice)之间的分馏(ε_(wax-ice))与冰芯积累量(降水量)呈现反相关关系(R~2=0.65，P=0.0051)，说明气候的干湿变化对δD_(wax)有显著的影响.因此降水稳定同位素和降水量是影响δD_(wax)的两个重要因素. |
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来源
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科学通报
,2012,57(15):1353-1361 【核心库】
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关键词
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正构烷烃
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氢稳定同位素
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湖芯
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冰芯
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地址
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中国科学院青藏高原研究所, 北京, 100085
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0023-074X |
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学科
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大气科学(气象学) |
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基金
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中国科学院知识创新工程重要方向项目
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国家973计划
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文献收藏号
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CSCD:4534855
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