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引用本文:夏忠欢,徐柏青,MiiglerI,邬光剑,GleixnerG,SachseD,朱立平.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.湖泊科学,2010,22(1):127-135. DOI:10.18307/2010.0118
XIA Zhonghuan,XU Baiqing,Miigler I.,WU Guangjian,Gleixner G,Sachse D.,ZHU Liping.Climatic significance of hydrogen isotope ratios of terrigenous n-alkanes in Kongmo Co on the southern Tibetan Plateau. J. Lake Sci.2010,22(1):127-135. DOI:10.18307/2010.0118
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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
夏忠欢,徐柏青,MiiglerI,邬光剑,GleixnerG,SachseD,朱立平
1.中国科学院青藏高原环境变化与地表过程重点实验室, 中国科学院青藏高原研究所, 北京 100085;2.Max Planck Institute fur Biogeochemistry, Hans-Kn 11 StraBe 1007745 Jena, Germany;3.DFG-Leibniz Genter for Surface Process and Climate Studies, Institut fVr Ceowissenschaften, Universit t Potsdam, Germany
摘要:
在青藏高原南部空姆错钻取了-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(C25,C27,C29,C31)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。
关键词:  正构烷烃  湖泊沉积  氢同位素比值  空姆错  气候  青藏高原
DOI:10.18307/2010.0118
分类号:
基金项目:国家重点基础研究发展计划项目(973计划)(2009CB723901);中国科学院知识创新工程项目(KZCX2-YW-Q09-03、KZCX2-YW-146)联合资助
Climatic significance of hydrogen isotope ratios of terrigenous n-alkanes in Kongmo Co on the southern Tibetan Plateau
XIA Zhonghuan1, XU Baiqing1, Miigler I.2,3, WU Guangjian1, Gleixner G2,3, Sachse D.4,5, ZHU Liping1
1.Key Laboratory of Tibetan Environmental Changes and Land Surface Processes,Chinese Academy of Sciences,Beijing 100085,China;2.Max Planck Institut fü3.r Biogeochemistry,Hans-Kn 11 Straβe 10,07745 Jena,Germany;4.DFG-Leibniz Genter for Surface Process and Climate Studies,Institut fü5.r Geowissenschaften,Universit t Potsdam,Germany
Abstract:
We sampled a short sediment core in Lake Kongmo Co on the southern Tibetan Plateau, and extracted terrigenous al-kanes(n-C25 to n-C31,)from the core spanning the past near-50 years at 7-year resolution, and compared the hydrogen isotope ratios of these biomarkers with meteorological records of the nearby Langkazi and Lhasa weather stations. Hydrogen isotope ratios of thesen-alkanes significantly correlated with mean growing season air temperature, whereas 8D values of these biomarkers showed poorcorrelations with both precipitation amount and relative humidity during the growth seasons, indicating that these n-alkanes recor-ded the air temperature signal and can be used as a proxy for paleotemperature reconstruction.
Key words:  n-alkanes  lacustrine sediment  hydrogen isotope ratio  Kongmo Co  climate  Tibetan Plateau
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