| 苦海沉积物有机质反映的过去840年来青藏高原东部环境变化 |
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| 引用本文： | 覃罗,吴旭东,李江,李祥忠,方立东.苦海沉积物有机质反映的过去840年来青藏高原东部环境变化[J].盐湖研究,2022,30(1):7-15. |
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| 作者姓名： | 覃罗 吴旭东 李江 李祥忠 方立东 |
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| 作者单位： | 云南省地球系统科学重点实验室,云南大学地球系统科学研究中心,云南 昆明 650500;河北地质大学土地科学与空间规划学院,河北 石家庄 050031;中国冶金地质总局山东正元地质勘查院,山东 济南 250101 |
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| 基金项目： | 国家自然科学基金(41672163)；中国科学院地球环境研究所黄土与第四纪地质国家重点实验室(SKLLQG2025) |
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| 摘 要： | 青藏高原对全球气候变暖响应敏感,研究青藏高原近千年来环境演化过程、规律与驱动机制对预测其未来气候可能发生的变化有重要参照意义.通过位于青藏高原东部的苦海沉积物总有机质相关指标总有机碳(TOC)、总氮(TN)、总有机碳与总氮比值(TOC/TN)和总有机碳同位素(δ13Corg)]的研究重建了该区域过去840年来的环境演...
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| 关 键 词： | 有机质 苦海 青藏高原 近千年 环境变化 |
| 收稿时间： | 2020/12/2 0:00:00 |
| 修稿时间： | 2021/1/21 0:00:00 |
Environmental Changes in Eastern Qinghai-Tibetan Plateau During the Last 840 Years Revealed by Organic Matters in Kuhai Lake Sediments |
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| QIN Luo,WU Xu-Dong,LI Jiang,LI Xiang-Zhong,FANG Li-dong.Environmental Changes in Eastern Qinghai-Tibetan Plateau During the Last 840 Years Revealed by Organic Matters in Kuhai Lake Sediments[J].Journal of Salt Lake Research,2022,30(1):7-15. |
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| Authors: | QIN Luo WU Xu-Dong LI Jiang LI Xiang-Zhong FANG Li-dong |
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| Institution: | (Yunnan Key Laboratory of Earth System Science,Research Center for Earth System Science,Yunnan University,Kunming,650500,China;School of Land Science and Space Planning,Hebei GEO University,Shijiazhuang,050031,China;Shandong Zhengyuan Geological Survey Institute,China Metallurgical Geology Bureau,Jinan,250101,China) |
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| Abstract: | The Qinghai-Tibetan Plateau is particularly sensitive to global warming.It is of great importance to study environment evolution process,law and driving force of Qinghai-Tibetan Plateau during the last millennium for predicting future climate change.Total organic matter related proxies,including total organic carbon(TOC),total nitrogen(TN),the ratio of total organic carbon versus total nitrogen(TOC/TN)as well as carbon isotope of total organic matters((δ13Corg)of sediments from Kuhai Lake,a small saline lake located in eastern Qinghai-Tibetan Plateau,during the last 840 years were comprehensively analyzed.The results suggest that organic matters in Kuhai Lake sediments are mainly from aquatic plants within the lake and variation of ^13Corg is mainly controlled by lake level changes.When the climate was warmer(colder),runoff in the upper reaches of the Yellow River became higher(lower),which led to higher(lower)Kuhai Lake levels,enhanced(weakened)lake hydrodynamics,and hence higher(lower)contribution of submerged plants to TOC in the studied core and positive(negative)(513 Corg values for the sediments.Abnormal warming of Qinghai-Tibetan Plateau during the last 50 years cuased by human activities may account for reversed correlation between runoff in the upper reaches of the Yellow River since 1950 AD indicated by 513 Corg and reconstructed temperatures of China.Consistent variations among^13Corg of Kuhai Lake sediments,^18 O of stalagmite from Wanxiang Cave and reconstructed total solar isolation indicate that environmental changes in eastern Qinghai-Tibetan Plateau was controlled by monsoon precipitation driven by solar isolation. |
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| Keywords: | Organic matters Kuhai Lake Qinghai-Tibetan plateau The last millennium Enviromental changes |
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