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学科主题: Geology
题名: RAPID CHANGES IN THE EAST ASIAN MONSOON DURING THE LAST INTERGLACIAL IN THE BOHAI SEA COASTAL ZONE, CHINA
作者: Du, SH ; Li, BS ; Li, ZW ; Chen, MH ; Xiang, R ; Zhang, DD ; Niu, DF ; Zhang, LL
通讯作者: libsh@scnu.edu.cn
刊名: JOURNAL OF SEDIMENTARY RESEARCH
发表日期: 2014
卷: 84, 期:41641, 页:88-96
收录类别: sci
部门归属: [Du, Shuhuan ; Chen, Muhong ; Xiang, Rong ; Zhang, Lanlan] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China ; [Li, Baosheng ; Niu, Dongfeng] S China Normal Univ, Dept Geog, Guangzhou 510631, Guangdong, Peoples R China ; [Li, Baosheng] Chinese Acad Sci, Inst Earth Environm, Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China ; [Li, Zhiwen] E China Inst Technol, Coll Earth Sci, Nanchang 344000, Peoples R China ; [Zhang, David Dian] Univ Hong Kong, Hong Kong, Hong Kong, Peoples R China
项目归属: 海洋地质
资助者: National Key Basic Research Program of China [2013CB9561 02]; National Basic Research Program of China [2013CB955903]; National Natural Science Foundation of China [41206036, 41290254, 91228207, 41201006]; China Postdoctoral Science Foundation funded project [2012M521632]; Key Laboratory of Marginal Sea Geology, Chinese Academy of Sciences [MSGL12-03]
摘要: The Bohai Sea coastal zone of China faces the Pacific Ocean to the east and the Eurasian continent to the west; hence, this region is influenced by both the ocean and continental landmasses. The Bohai Sea coastal zone has significant monsoon climate characteristics and a strong sensitivity to climate change. The Miaodao stratigraphical section (MDS) contains historical information about climate features in the region, especially the high-frequency variations during the last interglacial, sea-level changes, and the evolution of the East Asian monsoon. By analyzing the ages of various sedimentary facies in combination with proxy paleoclimatic indices (i.e., grain < 63 mu m fraction, average grain size (Mz), clay + silt/sand content (SC/D), magnetic susceptibility, and the ratios Na2O/Al2O3 and (Al2O3 + TOFe)/SiO2, in the fifth segments of the MDS from the last interglacial (MDS5), we conclude that subsections 5a, 5c, and 5e were controlled by summer monsoons, whereas subsections 5b and 5d were formed when winter monsoons prevailed. These results were similar to oxygen isotope analyses from previous studies including the Spectral Mapping Project (SPECMAP) and the North Greenland Ice Core Project (NorthGRIP). Five and a half comparable oscillations in proxy indices that were dated to ca. 116.1, 118.3, 121.2, 122.7, 125.9, and 128.7 ka occurred within the MDS 5e subsection when winter monsoon winds strengthened. This millennial-scale climate variability during the Eemian period may have reached up to ten and a half oscillations with a quasi-periodicity of approximately a 1,470 year cycle during the late glacial period. This rapid period of climate change has been recorded in northern and central Europe, central Asia, and in East Asia. The climate-influencing mechanism was probably initiated by changes in solar activity and driven by the East Asian monsoon and sea-level oscillations.
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WOS记录号: WOS:000336510800008
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10657
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Du, SH; Li, BS; Li, ZW; Chen, MH; Xiang, R; Zhang, DD; Niu, DF; Zhang, LL.RAPID CHANGES IN THE EAST ASIAN MONSOON DURING THE LAST INTERGLACIAL IN THE BOHAI SEA COASTAL ZONE, CHINA,JOURNAL OF SEDIMENTARY RESEARCH,2014,84(41641):88-96
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