Registration of Precession Signal in the Last Interglacial Paleosol (S-1) on the Chinese Loess Plateau

doi:10.1002/2017GC006964

	Registration of Precession Signal in the Last Interglacial Paleosol (S-1) on the Chinese Loess Plateau
	Ma, Long 2,3; Li, Ying 2; Liu, Xingxing 2; Sun, Youbin 1,2
刊名	GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
	2017-11-01
卷号	18 期号:11 页码:3964-3975
关键词	Chinese Loess Plateau Last Interglacial Paleosol (S-1) Precessional Signal Intensity Sedimentation Rate Mean Annual Precipitation
ISSN号	1525-2027
DOI	10.1002/2017GC006964
文献子类	Article
英文摘要	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.
WOS关键词	EAST-ASIAN MONSOON ; ICE-AGE TERMINATIONS ; SUMMER MONSOON ; GRAIN-SIZE ; MAGNETIC-SUSCEPTIBILITY ; MILLENNIAL-SCALE ; CLIMATIC CHANGES ; WINTER MONSOONS ; NORTHWEST CHINA ; NORTHERN CHINA
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000418403800013
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/15645]
专题	地球环境研究所_古环境研究室
通讯作者	Ma, Long; Sun, Youbin
作者单位	1.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing, 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.