| Paleoclimatic Change Inferred from Carbon Isotope Composition of Organic Matter in Sediments of Dabusu Lake, Jilin Province, China |
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| 作者姓名： | 沈吉 张恩楼 羊向东 RyoMatsumoto |
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| 作者单位： | [1]NanjingInstituteofGeography＆Limnology,ChineseAcademyofScietwes,Nanjing210008,China [2]GeologicalInstitute,UniversityofTokyo,Tokyo113,Japan |
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| 基金项目： | ProjectCXNIGLAS -A0 2 -0 5supportedbyChineseAcademyofSciences ,alsosupportedbyNSFC ( 4 0 0 72 0 5 6) |
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| 摘 要： | Study on the organic compounds and stable isotope composition of a sediment section in Dabusu Lake revealed that the organic materials in the sediments came mainly from terrestrial plants brought into the lake by rtmoff.The δ^13 C of the organic materials had high values during warm-dry climatic stages and decreased in cold-wet stages.Analysis of data on carbonate content and ^14C age showed that the lake basin had experienced several wet-cold and warm-dry climatic cycles since 15000 a BP. Since 6700 a BP, the climate reached a relatively stable warm-dry stage,so that the lake water was gradually condensed and finally a saline lake was formed.
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| 关 键 词： | 有机碳同位素 沉积 古气候 吉林 |
| 收稿时间： | 16 October 2002 |
| 修稿时间： | 17 July 2003 |
Paleoclimatic change inferred from carbon isotope composition of organic matter in sediments of Dabusu Lake,Jilin Province,China |
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| Shen?Ji,Zhang?Enlou,Yang?Xiangdong,Ryo?Matsumoto.Paleoclimatic Change Inferred from Carbon Isotope Composition of Organic Matter in Sediments of Dabusu Lake, Jilin Province, China[J].Chinese Journal of Oceanology and Limnology,2004,22(2):124-129. |
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| Authors: | Shen Ji Zhang Enlou Yang Xiangdong Ryo Matsumoto |
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| Institution: | (1) Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, 210008 Nanjing, China;(2) Geological Institute, University of Tokyo, 113 Tokyo, Japan |
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| Abstract: | Study on the organic compounds and stable isotope composition of a sediment section in Dabusu Lake revealed that the organic
materials in the sediments came mainly from terrestrial plants brought into the lake by runoff. The δ13 C of the organic materials had high values during warm-dry climatic stages and decreased in cold-wet stages. Analysis of
data on carbonate content and14C age showed that the lake basin had experienced several wet-cold and warm-dry climatic cycles since 15000 a BP. Since 6700
a BP, the climate reached a relatively stable warm-dry stage, so that the lake water was gradually condensed and finally a
saline lake was formed.
Project CXNIGLAS-A02-05 supported by Chinese Academy of Sciences, also supported by NSFC (40072056). |
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| Keywords: | organic carbon isotope paleoclimate Dabusu Lake |
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