High‐resolution scanning XRF investigation of Chinese loess and its implications for millennial‐scale monsoon variability
ABSTRACT Millennial‐scale monsoon variability has been investigated intensively using loess‐based proxies; however, the amplitude and rhythms of millennial‐scale signals have seldom been disentangled from the background glacial–interglacial changes. Here we present the results of high‐resolution sca...
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crwiley:10.1002/jqs.2856 2024-06-02T08:07:34+00:00 High‐resolution scanning XRF investigation of Chinese loess and its implications for millennial‐scale monsoon variability Sun, Youbin Liang, Lianji Bloemendal, Jan Li, Ying Wu, Feng Yao, Zhengquan Liu, Yanguang National Science Foundation 2016 http://dx.doi.org/10.1002/jqs.2856 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.2856 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.2856 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.2856 https://onlinelibrary.wiley.com/doi/am-pdf/10.1002/jqs.2856 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 31, issue 3, page 191-202 ISSN 0267-8179 1099-1417 journal-article 2016 crwiley https://doi.org/10.1002/jqs.2856 2024-05-03T11:26:48Z ABSTRACT Millennial‐scale monsoon variability has been investigated intensively using loess‐based proxies; however, the amplitude and rhythms of millennial‐scale signals have seldom been disentangled from the background glacial–interglacial changes. Here we present the results of high‐resolution scanning X‐ray fluorescence analysis of a 75‐m‐thick loess sequence from the north‐western Chinese Loess Plateau to address glacial–interglacial to millennial monsoon variability over the last two climatic cycles. Variations of the Si/K, Fe/K and Ca/K ratios are separated spectrally into low‐ and high‐frequency components corresponding to glacial–interglacial and millennial‐scale monsoon variability, respectively. The results indicate that the three elemental ratios exhibit similar glacial–interglacial variability but with varying spectral densities at the 100‐, 41‐ and 23‐kyr periodicities. Millennial‐scale variability is quite similar between the three elemental ratios, and comparable to those inferred from records of Chinese speleothem δ 18 O, Greenland palaeotemperature and North Atlantic cooling events. Comparison of various proxies indicates the broad similar magnitudes of abrupt climate changes, at least during the last two glacial–interglacial cycles, whereas the timing and amplitude of abrupt climatic events are not well correlated. We suggest that refinement of loess chronology and intensive data‐model integration in the future are critical to decipher the characteristics and dynamics of rapid monsoon changes. Article in Journal/Newspaper Greenland North Atlantic Wiley Online Library Greenland Journal of Quaternary Science 31 3 191 202 |
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English |
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ABSTRACT Millennial‐scale monsoon variability has been investigated intensively using loess‐based proxies; however, the amplitude and rhythms of millennial‐scale signals have seldom been disentangled from the background glacial–interglacial changes. Here we present the results of high‐resolution scanning X‐ray fluorescence analysis of a 75‐m‐thick loess sequence from the north‐western Chinese Loess Plateau to address glacial–interglacial to millennial monsoon variability over the last two climatic cycles. Variations of the Si/K, Fe/K and Ca/K ratios are separated spectrally into low‐ and high‐frequency components corresponding to glacial–interglacial and millennial‐scale monsoon variability, respectively. The results indicate that the three elemental ratios exhibit similar glacial–interglacial variability but with varying spectral densities at the 100‐, 41‐ and 23‐kyr periodicities. Millennial‐scale variability is quite similar between the three elemental ratios, and comparable to those inferred from records of Chinese speleothem δ 18 O, Greenland palaeotemperature and North Atlantic cooling events. Comparison of various proxies indicates the broad similar magnitudes of abrupt climate changes, at least during the last two glacial–interglacial cycles, whereas the timing and amplitude of abrupt climatic events are not well correlated. We suggest that refinement of loess chronology and intensive data‐model integration in the future are critical to decipher the characteristics and dynamics of rapid monsoon changes. |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Sun, Youbin Liang, Lianji Bloemendal, Jan Li, Ying Wu, Feng Yao, Zhengquan Liu, Yanguang |
spellingShingle |
Sun, Youbin Liang, Lianji Bloemendal, Jan Li, Ying Wu, Feng Yao, Zhengquan Liu, Yanguang High‐resolution scanning XRF investigation of Chinese loess and its implications for millennial‐scale monsoon variability |
author_facet |
Sun, Youbin Liang, Lianji Bloemendal, Jan Li, Ying Wu, Feng Yao, Zhengquan Liu, Yanguang |
author_sort |
Sun, Youbin |
title |
High‐resolution scanning XRF investigation of Chinese loess and its implications for millennial‐scale monsoon variability |
title_short |
High‐resolution scanning XRF investigation of Chinese loess and its implications for millennial‐scale monsoon variability |
title_full |
High‐resolution scanning XRF investigation of Chinese loess and its implications for millennial‐scale monsoon variability |
title_fullStr |
High‐resolution scanning XRF investigation of Chinese loess and its implications for millennial‐scale monsoon variability |
title_full_unstemmed |
High‐resolution scanning XRF investigation of Chinese loess and its implications for millennial‐scale monsoon variability |
title_sort |
high‐resolution scanning xrf investigation of chinese loess and its implications for millennial‐scale monsoon variability |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1002/jqs.2856 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.2856 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.2856 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.2856 https://onlinelibrary.wiley.com/doi/am-pdf/10.1002/jqs.2856 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic |
genre_facet |
Greenland North Atlantic |
op_source |
Journal of Quaternary Science volume 31, issue 3, page 191-202 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.2856 |
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Journal of Quaternary Science |
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31 |
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3 |
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191 |
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202 |
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1800752659084345344 |