| 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 Author | Guo, Fei(guofei@ieecas.cn) ; Sun, Youbin(sunyb@ieecas.cn) |
| 2021-03-01 | |
| Source Publication | CATENA
 |
| ISSN | 0341-8162 |
| Volume | 198Pages:11 |
| Abstract | 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. |
| Keyword | Chinese Loess Plateau Linxia section East Asian monsoon XRF scanning Elemental ratios |
| DOI | 10.1016/j.catena.2020.105019 |
| WOS Keyword | ASIAN WINTER MONSOON ; SUMMER MONSOON ; PALEOSOL SEQUENCE ; MILLENNIAL-SCALE ; MAGNETIC-SUSCEPTIBILITY ; NORTH-ATLANTIC ; CLIMATE RECORDS ; XRF-SCANNER ; ICE-CORE ; PLEISTOCENE |
| Indexed By | SCI ; SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Geology ; Agriculture ; Water Resources |
| Funding Organization | 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 |
| WOS Subject | Geosciences, Multidisciplinary ; Soil Science ; Water Resources |
| WOS ID | WOS:000605337000041 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://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 Author | Guo, Fei; Sun, Youbin |
| Affiliation | 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 |
| 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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