| 冲绳海槽千年来陆源物质输入历史与东亚季风变迁 |
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| 引用本文： | 陈金霞,李铁刚,南青云.冲绳海槽千年来陆源物质输入历史与东亚季风变迁[J].地球科学,2009(5). |
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| 作者姓名： | 陈金霞 李铁刚 南青云 |
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| 作者单位： | 中国科学院海洋地质与环境重点实验室;中国科学院研究生院; |
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| 基金项目： | 中科院知识创新项目(No.KZCX3-SW-233);;国家自然科学基金面上项目(Nos.40576032,40506015);;“973”项目(No.2007CB815903) |
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| 摘 要： | 为解决近1000年以来东海沿岸地区气候演化及其对南冲绳海槽陆源物质输入的影响,对取自南冲绳海槽的MD05-2908孔上部(0～810cm)共78份孢粉样品和199份有机碳同位素样品进行了分析.结果显示,近1000年以来南冲绳海槽陆源物质输入存在着显著波动,其中1100～1040aBP、960～880aBP和800～480aBP期间,陆源物质输入比例增加;1040～960aBP和480～230aBP期间,陆源物质输入比例减少.将陆源物质输入指标与陕西佛爷洞δ13C含量记录对比分析,发现陆源物质输入比例变化与季风的变化密切相关.当夏季风减弱时,导致降雨带长时间集中在南部地区,增强的降雨量提高了风化剥蚀以及沉积物向海洋搬运的能力,使得陆源物质供应量增加.
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| 关 键 词： | 孢粉 有机碳同位素 陆源物质输入 降雨量 季风 |
Variations of Terrigenous Material Discharges in the South Okinawa Trough and Its Relation to the East Asian Summer Monsoon since the Last Millennium |
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| CHEN Jin-xia ,LI Tie-gang,NAN Qing-yun , .Key Laboratory of Marine Geology , Environment.Variations of Terrigenous Material Discharges in the South Okinawa Trough and Its Relation to the East Asian Summer Monsoon since the Last Millennium[J].Earth Science-Journal of China University of Geosciences,2009(5). |
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| Authors: | CHEN Jin-xia LI Tie-gang NAN Qing-yun Key Laboratory of Marine Geology Environment |
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| Institution: | CHEN Jin-xia 1,2,LI Tie-gang1,NAN Qing-yun 1,2 1.Key Laboratory of Marine Geology , Environment,Institute of Oceanology,Chinese Academy of Sciences,Qingdao266071,China 2.Graduated School of Chinese Academy of Sciences,Beijing100039,China |
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| Abstract: | The top part of a giant IMAGE core MD05-2908 taken from the South Okinawa Trough was investigated for the sake of understanding the climate evolution in Donghai seacoast areas since the last millennium.Sporopollen and organic carbon isotope records of bulk sediments were used as proxies to trace the climate variations and terrigenous materials discharges.Time series were demarcated by 4 AMS 14 C dating ages.Comprehensive data of sporopollen and carbon isotopic composition,together with the paleoenvironmenta... |
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| Keywords: | sporopollen organic carbon isotope terrigenous material discharge rainfall monsoon |
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