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篇目详细内容 |
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【篇名】 |
A grain-size record from Beijing region in Northern China: Late Quaternary paleoclimate oscillation in response to global change |
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【刊名】 |
Frontiers of Earth Science in China |
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【刊名缩写】 |
Front. Earth Sci. China |
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【ISSN】 |
1673-7385 |
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【EISSN】 |
1673-7490 |
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【DOI】 |
10.1007/s11707-009-0034-4 |
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【出版社】 |
Higher Education Press and Springer-Verlag |
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【出版年】 |
2009 |
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【卷期】 |
3
卷2期 |
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【页码】 |
164-170
页,共
7
页 |
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【作者】 |
Guifang YANG;
Zhiliang GE;
Qing DAI;
Jie CHENG;
Gongming YIN;
Lihong ZAN;
Jingwei LIU;
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【关键词】 |
paleoclimatic variations; 103─104 year scale oscillations; grain-size analysis; the Beijing plain |
【摘要】 |
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Numerous samples taken from one core at the Beijing plain were utilized to characterize the paleoclimatic configuration of the study area and its possible relation to global control since the last interglaciation. We presented here a detailed grain-size record for the full length of Late Pleistocene, along with the optical simulated luminescence (OSL) dating. Our findings revealed that Late Pleistocene of the study area started approximately at 110ka B.P. represented by the thick sediments of 31m in Changping depression. Four sedimentary cycles were outlined in the core during Late Pleistocene, corresponding to marine isotope stage (MIS) 5 to 2. Controlled by regional geology and global climatic setting, eight paleoclimatic periods were identified simultaneously in the study area on the time scale of 104 year, with the warm and moist climate being found at 110−96, 92−76, 67−56, and 28−18ka B.P.. The climatic instabilities on a millennial scale in Late Pleistocene were characterized largely by the occurrence of 6 strong Heinrich events shown by comparatively coarse groups. These variations correlate well with those documented in the GRIP Greenland and in the Northern Atlantic Ocean, though more complex features may exist on the long time scale. |
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