青藏高原南部空姆错湖芯中陆源正构烷烃氢同位素比值的气候意义
Climatic significance of hydrogen isotope ratios of terrigenous n-alkanes in Kongmo Co on the southern Tibetan Plateau
查看参考文献50篇
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文摘
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在青藏高原南部空姆错钻取了一根浅湖芯,对其中时间跨度约为50年的剖面按7年间隔对其中陆源正构烷烃(C_(25),C_(27),C_(29),C_(31))进行了提取分析.通过将这些生物标志物的氢同位素比值与附近浪卡子气象站和拉萨气象站的气象参数记录进行比较,发现这些生物标志物的δD值与生长季节时段的平均气温显著相关,而与生长季节时段的降雨量和相对湿度的相关性差,说明陆源沉积正构烷烃的氢同位素比值主要记录了气温信号,可以被用于古温度重建. |
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其他语种文摘
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We sampled a short sediment core in Lake Kongmo Co on the southern Tibetan Plateau,and extracted terrigenous alkanes(n-C_(25) to n-C_(31))from the core spanning the past near-50 years at 7-year resolution,and compared the hydrogen isotope ratios of these biomarkers with meteorolgical records of the nearby Laogkazi and Lhasa weather stations.Hydrogen isotope ratios of these n-alkanes significantly correlated with mean growing season air temperature,whereas δD values of these biomarkers showed poor correlations with both precipitation amount and relative humidity during the growth seasons,indicating that these n-alkanes recorded the air temperature signal and can be used as a proxy for paleotemperature reconstruction. |
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来源
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湖泊科学
,2010,22(1):127-135 【核心库】
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DOI
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10.18307/2010.0118
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关键词
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正构烷烃
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湖泊沉积
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氢同位素比值
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空姆错
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气候
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青藏高原
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地址
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1.
中国科学院青藏高原研究所, 中国科学院青藏高原环境变化与地表过程重点实验室, 北京, 100085
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Max Planck lnstitut für Biogeochemistry, 07745
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DFG-Leibniz Genter for Surface Process and Climate Studies,lnstitat für Geowissenschaften
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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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1003-5427 |
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学科
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地球物理学 |
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基金
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国家973计划
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中国科学院知识创新工程项目
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文献收藏号
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CSCD:3840122
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