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Monsoon variations inferred from high-resolution geochemical records of the Linxia loess/paleosol sequence, western Chinese Loess Plateau
Guo, Fei1,2; Clemens, Steven C.3; Wang, Ting1,2; Wang, Yang1,2; Liu, Yuming1,2; Wu, Feng1; Liu, Xingxing1; Jin, Zhangdong1,4,5; Sun, Youbin1,4,5
Corresponding AuthorGuo, Fei(guofei@ieecas.cn) ; Sun, Youbin(sunyb@ieecas.cn)
2021-03-01
Source PublicationCATENA
ISSN0341-8162
Volume198Pages:11
AbstractChinese eolian deposits have been investigated intensively to reconstruct East Asian monsoon changes at tectonic to millennial timescales. However, high-resolution elemental proxies sensitive to rapid monsoon changes remains sparse. Here we present multiple elemental ratios of the Linxia loess sequence generated by scanning and conventional X-ray fluorescence (XRF) to assess East Asian monsoon variability at glacial-interglacial to sub-orbital timescales. The results show that 11 elements (Al, Si, K, Ca, Ti, Mn, Fe, Rb, Sr, Zr and Ba) can be reliably measured by XRF scanning of loess cores, albeit with relatively lower precision and increased noise levels (due to variable water content and matrix effects) when compared to XRF scanning of dry and homogenized powder samples. Seven elements (Ca, Fe, Ti, Mn, Zr, Rb and Sr), measured by XRF scanning of the core face and powder samples show high correlation (R-2 > 0.7, n = 100) with those measured by conventional XRF methods, and thus can be considered as robust indicators for chemical weathering and grain-size sorting. We employ element ratios of Ca/Ti and Rb/Sr to reflect precipitation-induced weathering intensity, and the Zr/Rb ratio and mean grain size to infer the sorting effects related to winter-monsoon winds. These element ratios exhibit significant glacialinterglacial fluctuations, similar to records of magnetic susceptibility and mean grain size. Precessional- to millennial-scale monsoon changes are also persistent in our high-resolution elemental proxies, consistent with those in Gulang loess elemental ratios and Hulu/Sanbao speleothem d18O records. Our results suggest that high resolution XRF scanning elemental ratios of Chinese loess have great potential for evaluating co-evolution of orbital- and millennial-scale monsoon variations.
KeywordChinese Loess Plateau Linxia section East Asian monsoon XRF scanning Elemental ratios
DOI10.1016/j.catena.2020.105019
WOS KeywordASIAN WINTER MONSOON ; SUMMER MONSOON ; PALEOSOL SEQUENCE ; MILLENNIAL-SCALE ; MAGNETIC-SUSCEPTIBILITY ; NORTH-ATLANTIC ; CLIMATE RECORDS ; XRF-SCANNER ; ICE-CORE ; PLEISTOCENE
Indexed BySCI ; SCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41525008] ; National Natural Science Foundation of China[41472163] ; National Key Research and Development Program of China[2016YFA0601902] ; Strategic Priority Research Program of Chinese Academy of Science[XDB40000000] ; State Key Laboratory of Loess and Quaternary Geology, IEECAS[SKLLQG1808]
WOS Research AreaGeology ; Agriculture ; Water Resources
Funding OrganizationNational Natural Science Foundation of China ; National Key Research and Development Program of China ; Strategic Priority Research Program of Chinese Academy of Science ; State Key Laboratory of Loess and Quaternary Geology, IEECAS
WOS SubjectGeosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS IDWOS:000605337000041
PublisherELSEVIER
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/15862
Collection古环境研究室
第四纪科学与全球变化卓越创新中心
Corresponding AuthorGuo, Fei; Sun, Youbin
Affiliation1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA
4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
5.Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Ocean Continental Climate & Environm, Qingdao 266200, Peoples R China
Recommended Citation
GB/T 7714
Guo, Fei,Clemens, Steven C.,Wang, Ting,et al. Monsoon variations inferred from high-resolution geochemical records of the Linxia loess/paleosol sequence, western Chinese Loess Plateau[J]. CATENA,2021,198:11.
APA Guo, Fei.,Clemens, Steven C..,Wang, Ting.,Wang, Yang.,Liu, Yuming.,...&Sun, Youbin.(2021).Monsoon variations inferred from high-resolution geochemical records of the Linxia loess/paleosol sequence, western Chinese Loess Plateau.CATENA,198,11.
MLA Guo, Fei,et al."Monsoon variations inferred from high-resolution geochemical records of the Linxia loess/paleosol sequence, western Chinese Loess Plateau".CATENA 198(2021):11.
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