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

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 seque...

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Published in:CATENA
Main Authors: Guo, Fei, Clemens, Steven C., Wang, Ting, Wang, Yang, Liu, Yuming, Wu, Feng, Liu, Xingxing, Jin, Zhangdong, Sun, Youbin
Format: Report
Language:English
Published: ELSEVIER 2021
Subjects:
Online Access:http://ir.ieecas.cn/handle/361006/15860
https://doi.org/10.1016/j.catena.2020.105019
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record_format openpolar
spelling ftchinacascieeca:oai:ir.ieecas.cn:361006/15860 2023-06-11T04:12:43+02:00 Monsoon variations inferred from high-resolution geochemical records of the Linxia loess/paleosol sequence, western Chinese Loess Plateau Guo, Fei Clemens, Steven C. Wang, Ting Wang, Yang Liu, Yuming Wu, Feng Liu, Xingxing Jin, Zhangdong Sun, Youbin 2021-03-01 http://ir.ieecas.cn/handle/361006/15860 https://doi.org/10.1016/j.catena.2020.105019 英语 eng ELSEVIER CATENA http://ir.ieecas.cn/handle/361006/15860 doi:10.1016/j.catena.2020.105019 Chinese Loess Plateau Linxia section East Asian monsoon XRF scanning Elemental ratios ASIAN WINTER MONSOON SUMMER MONSOON PALEOSOL SEQUENCE MILLENNIAL-SCALE MAGNETIC-SUSCEPTIBILITY NORTH-ATLANTIC CLIMATE RECORDS XRF-SCANNER ICE-CORE PLEISTOCENE Geology Agriculture Water Resources Geosciences Multidisciplinary Soil Science 期刊论文 2021 ftchinacascieeca https://doi.org/10.1016/j.catena.2020.105019 2023-05-08T13:25:07Z 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. Report ice core North Atlantic Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences) Hulu ENVELOPE(8.610,8.610,62.837,62.837) CATENA 198 105019
institution Open Polar
collection Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences)
op_collection_id ftchinacascieeca
language English
topic Chinese Loess Plateau
Linxia section
East Asian monsoon
XRF scanning
Elemental ratios
ASIAN WINTER MONSOON
SUMMER MONSOON
PALEOSOL SEQUENCE
MILLENNIAL-SCALE
MAGNETIC-SUSCEPTIBILITY
NORTH-ATLANTIC
CLIMATE RECORDS
XRF-SCANNER
ICE-CORE
PLEISTOCENE
Geology
Agriculture
Water Resources
Geosciences
Multidisciplinary
Soil Science
spellingShingle Chinese Loess Plateau
Linxia section
East Asian monsoon
XRF scanning
Elemental ratios
ASIAN WINTER MONSOON
SUMMER MONSOON
PALEOSOL SEQUENCE
MILLENNIAL-SCALE
MAGNETIC-SUSCEPTIBILITY
NORTH-ATLANTIC
CLIMATE RECORDS
XRF-SCANNER
ICE-CORE
PLEISTOCENE
Geology
Agriculture
Water Resources
Geosciences
Multidisciplinary
Soil Science
Guo, Fei
Clemens, Steven C.
Wang, Ting
Wang, Yang
Liu, Yuming
Wu, Feng
Liu, Xingxing
Jin, Zhangdong
Sun, Youbin
Monsoon variations inferred from high-resolution geochemical records of the Linxia loess/paleosol sequence, western Chinese Loess Plateau
topic_facet Chinese Loess Plateau
Linxia section
East Asian monsoon
XRF scanning
Elemental ratios
ASIAN WINTER MONSOON
SUMMER MONSOON
PALEOSOL SEQUENCE
MILLENNIAL-SCALE
MAGNETIC-SUSCEPTIBILITY
NORTH-ATLANTIC
CLIMATE RECORDS
XRF-SCANNER
ICE-CORE
PLEISTOCENE
Geology
Agriculture
Water Resources
Geosciences
Multidisciplinary
Soil Science
description 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.
format Report
author Guo, Fei
Clemens, Steven C.
Wang, Ting
Wang, Yang
Liu, Yuming
Wu, Feng
Liu, Xingxing
Jin, Zhangdong
Sun, Youbin
author_facet Guo, Fei
Clemens, Steven C.
Wang, Ting
Wang, Yang
Liu, Yuming
Wu, Feng
Liu, Xingxing
Jin, Zhangdong
Sun, Youbin
author_sort Guo, Fei
title Monsoon variations inferred from high-resolution geochemical records of the Linxia loess/paleosol sequence, western Chinese Loess Plateau
title_short Monsoon variations inferred from high-resolution geochemical records of the Linxia loess/paleosol sequence, western Chinese Loess Plateau
title_full Monsoon variations inferred from high-resolution geochemical records of the Linxia loess/paleosol sequence, western Chinese Loess Plateau
title_fullStr Monsoon variations inferred from high-resolution geochemical records of the Linxia loess/paleosol sequence, western Chinese Loess Plateau
title_full_unstemmed Monsoon variations inferred from high-resolution geochemical records of the Linxia loess/paleosol sequence, western Chinese Loess Plateau
title_sort monsoon variations inferred from high-resolution geochemical records of the linxia loess/paleosol sequence, western chinese loess plateau
publisher ELSEVIER
publishDate 2021
url http://ir.ieecas.cn/handle/361006/15860
https://doi.org/10.1016/j.catena.2020.105019
long_lat ENVELOPE(8.610,8.610,62.837,62.837)
geographic Hulu
geographic_facet Hulu
genre ice core
North Atlantic
genre_facet ice core
North Atlantic
op_relation CATENA
http://ir.ieecas.cn/handle/361006/15860
doi:10.1016/j.catena.2020.105019
op_doi https://doi.org/10.1016/j.catena.2020.105019
container_title CATENA
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