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学科主题: Geography, Physical; Geosciences, Multidisciplinary; Paleontology
题名: Coherence between solar activity and the East Asian winter monsoon variability in the past 8000 years from Yangtze River-derived mud in the East China Sea
作者: Xiao, SB ; Li, AC ; Liu, JP ; Chen, MH ; Xie, Q ; Jiang, FQ ; Li, TG ; Xiang, R ; Chen, Z
通讯作者: shangbinx@163.com ; acli@ms.qdio.ac.cn
关键词: solar irradiance ; East Asian monsoon ; Holocene ; spectral analyses ; East China sea ; grain-size
刊名: PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
发表日期: 2006
卷: 237, 期:40578, 页:293-304
收录类别: sci
部门归属: Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China; Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China; N Carolina State Univ, Dept Marine Earth & Atmospher Sci, Raleigh, NC 27695 USA
项目归属: LED
摘要: AMS(14)C dating and grain-size analysis for Core PC-6, located in the middle of a mud area on the inner shelf of the East China Sea (ECS), were used to rebuild the Holocene history of the East Asian winter monsoon (EAWM). The 7.5-m core recorded the history of environmental changes during the postglacial transgression. The core's mud section (the upper 450 cm) has been formed mainly by suspended sediment delivered from the Yangtze River mouth by the ECS Winter Coastal Current (ECSWCC) since 7.6 kyr BP. Using a mathematical method called "grain size vs. standard deviatioW', we can divide the Core PC-6's grain-size distribution into two populations at about 28 mu m. The fine population (< 28 mu m) is considered to be transported by the ECSWCC as suspended loads. Content of the fine population changes little and represents a stable sedimentary environment in accord with the present situation. Thus, variation of mean grain-size from the fine population would reflect the strength of ECSWCC, which is mainly controlled by the East Asian winter monsoon. Abrupt increasing mean grain size in the mud section is inferred to be transported by sudden strengthened ECSWCC, which was caused by the strengthened EAWM. Thus, the high resolution mean grain-size variation might serve as a proxy for reconstruction of the EAWM. A good correlation between sunspot change and the mean grain-size of suspended fine population suggests that one of the primary controls on centennial- to decadal-scale changes of the EAWM in the past 8 ka is the variations of sun irradiance, i.e., the EAWM will increase in intensity when the number of sunspots decreases. Spectral analyses of the mean grain-size time series of Core PC-6 show statistically significant periodicities centering on 2463, 1368, 128, 106, 100, 88-91, 7678, and 70-72 years. The EAWM and the East Asian summer monsoon (EASM) agree with each other well on these cycles, and the East Asian Monsoon (EAM) and the Indian Monsoon also share in concurrent cycles in Holocene, which are in accord with the changes of the sun irradiance. (c) 2005 Elsevier B.V. All rights reserved.
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WOS记录号: WOS:000239672600012
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/5779
Appears in Collections:热带海洋环境动力实验室(LTO)_期刊论文

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Recommended Citation:
Xiao, SB; Li, AC; Liu, JP; Chen, MH; Xie, Q; Jiang, FQ; Li, TG; Xiang, R; Chen, Z.Coherence between solar activity and the East Asian winter monsoon variability in the past 8000 years from Yangtze River-derived mud in the East China Sea,PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2006,237(40578):293-304
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文件名: Coherence between solar activity and the East Asian winter monsoon variability in the past 8000 years from Yangtze River-derived mud in the East China Sea.pdf
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