Registration of Precession Signal in the Last Interglacial Paleosol (S-1) on the Chinese Loess Plateau | |
Ma, Long1,2; Li, Ying1; Liu, Xingxing1; Sun, Youbin1,3 | |
2017-11-01 | |
发表期刊 | GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS |
ISSN | 1525-2027 |
卷号 | 18期号:11页码:3964-3975 |
文章类型 | Article |
摘要 | Solar insolation plays an essential role in driving orbital-scale East Asian Monsoon (EAM) variability. Unlike Chinese speleothem O-18 records characterized by dominant precessional cycles, many loess proxies from the Chinese Loess Plateau (CLP) usually display damped precessional-scale variability. To reconcile the precessional monsoon variability recorded in two classic archives, it's critical to investigate which factor can significantly affect the sensitivity of loess proxies to precessional forcing. In this study, we synthesize grain size (GS) and magnetic susceptibility () results of 18 paleosol (S-1) profiles over the CLP, with effort to evaluating the relative impacts of sedimentation rate (SR), and pedogenesis on the precessional signal intensity (PSI) during the last interglaciation. Based on unified grain-size age models, amplitude contrast between normalized GS and variations of five substages of the last interglaciation is employed to infer the PSI. The results indicate that precessional signals are evident in the GS/ records of the high-SR loess profiles on the northern and western CLP. Comparison of the PSI variations with the SR and mean annual precipitation (MAP) changes suggests that the GS-PSI is positively correlated to the SR changes, while the -PSI is negatively/positively related to the SR/MAP changes. Our results confirm that distinct precessional cycles in high-resolution loess proxies permit a plausible reconciliation of monsoon variability recorded in Chinese loess and speleothem. |
关键词 | Chinese Loess Plateau Last Interglacial Paleosol (S-1) Precessional Signal Intensity Sedimentation Rate Mean Annual Precipitation |
WOS标题词 | Science & Technology ; Physical Sciences |
DOI | 10.1002/2017GC006964 |
关键词[WOS] | EAST-ASIAN MONSOON ; ICE-AGE TERMINATIONS ; SUMMER MONSOON ; GRAIN-SIZE ; MAGNETIC-SUSCEPTIBILITY ; MILLENNIAL-SCALE ; CLIMATIC CHANGES ; WINTER MONSOONS ; NORTHWEST CHINA ; NORTHERN CHINA |
收录类别 | SCI |
语种 | 英语 |
WOS研究方向 | Geochemistry & Geophysics |
WOS类目 | Geochemistry & Geophysics |
WOS记录号 | WOS:000418403800013 |
出版者 | AMER GEOPHYSICAL UNION |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/15646 |
专题 | 古环境研究室 |
通讯作者 | Ma, Long; Sun, Youbin |
作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Shaanxi, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian, Shaanxi, Peoples R China |
推荐引用方式 GB/T 7714 | Ma, Long,Li, Ying,Liu, Xingxing,et al. Registration of Precession Signal in the Last Interglacial Paleosol (S-1) on the Chinese Loess Plateau[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2017,18(11):3964-3975. |
APA | Ma, Long,Li, Ying,Liu, Xingxing,&Sun, Youbin.(2017).Registration of Precession Signal in the Last Interglacial Paleosol (S-1) on the Chinese Loess Plateau.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,18(11),3964-3975. |
MLA | Ma, Long,et al."Registration of Precession Signal in the Last Interglacial Paleosol (S-1) on the Chinese Loess Plateau".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 18.11(2017):3964-3975. |
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