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Monsoon variations inferred from high-resolution geochemical records of the Linxia loess/paleosol sequence, western Chinese Loess Plateau

文献类型：期刊论文

作者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
刊名CATENA
出版日期2021-03-01
卷号198页码:11
ISSN号0341-8162
关键词Chinese Loess Plateau Linxia section East Asian monsoon XRF scanning Elemental ratios
DOI10.1016/j.catena.2020.105019
通讯作者Guo, Fei(guofei@ieecas.cn) ; Sun, Youbin(sunyb@ieecas.cn)
英文摘要Chinese 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.
WOS关键词ASIAN WINTER MONSOON ; SUMMER MONSOON ; PALEOSOL SEQUENCE ; MILLENNIAL-SCALE ; MAGNETIC-SUSCEPTIBILITY ; NORTH-ATLANTIC ; CLIMATE RECORDS ; XRF-SCANNER ; ICE-CORE ; PLEISTOCENE
资助项目National 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研究方向Geology ; Agriculture ; Water Resources
语种英语
出版者ELSEVIER
WOS记录号WOS:000605337000041
资助机构National 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
源URL[http://ir.ieecas.cn/handle/361006/15861]  
专题地球环境研究所_古环境研究室
第四纪科学与全球变化卓越创新中心
通讯作者Guo, Fei; Sun, Youbin
作者单位1.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
推荐引用方式
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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来源：地球环境研究所

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