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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
Source PublicationGEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
ISSN1525-2027
Volume18Issue:11Pages:3964-3975
SubtypeArticle
AbstractSolar 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.
KeywordChinese Loess Plateau Last Interglacial Paleosol (S-1) Precessional Signal Intensity Sedimentation Rate Mean Annual Precipitation
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1002/2017GC006964
WOS KeywordEAST-ASIAN MONSOON ; ICE-AGE TERMINATIONS ; SUMMER MONSOON ; GRAIN-SIZE ; MAGNETIC-SUSCEPTIBILITY ; MILLENNIAL-SCALE ; CLIMATIC CHANGES ; WINTER MONSOONS ; NORTHWEST CHINA ; NORTHERN CHINA
Indexed BySCI
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000418403800013
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/15646
Collection古环境研究室
Corresponding AuthorMa, Long; Sun, Youbin
Affiliation1.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
Recommended Citation
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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