High-sedimentation-rate loess records: A new window into understanding orbital- and millennial-scale monsoon variability
Chinese loess and stalagmites are two classic terrestrial archives that have been intensively studied to reconstruct the characteristics and dynamics of orbital- and millennial-scale monsoon variability. However, comparability between these two representative records remains contested due to chronol...
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ftchacadscgigcas:oai:ir.gig.ac.cn:344008/62758 2023-05-15T16:39:05+02:00 High-sedimentation-rate loess records: A new window into understanding orbital- and millennial-scale monsoon variability Sun, Youbin Clemens, Steven C. Guo, Fei Liu, Xingxing Wang, Yang Yan, Yan Liang, Lianji 2021-09-01 http://ir.gig.ac.cn/handle/344008/62758 https://doi.org/10.1016/j.earscirev.2021.103731 英语 eng ELSEVIER EARTH-SCIENCE REVIEWS http://ir.gig.ac.cn/handle/344008/62758 doi:10.1016/j.earscirev.2021.103731 Geology Chinese loess Stalagmites East Asian monsoon Orbital-and millennial-scale variability Monsoon dynamics Geosciences Multidisciplinary EAST-ASIAN MONSOON EMPIRICAL MODE DECOMPOSITION MAJOR GLACIATION CYCLES SUMMER MONSOON GLOBAL MONSOON WINTER MONSOON NORTH-ATLANTIC GRAIN-SIZE MAGNETIC-SUSCEPTIBILITY 期刊论文 2021 ftchacadscgigcas https://doi.org/10.1016/j.earscirev.2021.103731 2022-03-27T20:33:10Z Chinese loess and stalagmites are two classic terrestrial archives that have been intensively studied to reconstruct the characteristics and dynamics of orbital- and millennial-scale monsoon variability. However, comparability between these two representative records remains contested due to chronological uncertainty and proxy complexity. Here five high-sedimentation-rate loess records on the Chinese Loess Plateau are investigated to assess East Asian monsoon variability at orbital and millennial timescales. By correlating loess grain size (a winter monsoon proxy) to speleothem 818O (a summer monsoon proxy), we establish an independent speleothem-based chronology for Chinese loess-paleosol sequences over the past 640 ka. The synchronized loess grain-size records indicate that winter monsoon variability is spatially consistent on glacial-interglacial to millennial timescales, exhibiting distinctive precession- and millennial-scale changes similar to those of speleothem 818O records. However, as affected by the complex processes of deposition and weathering, magnetic susceptibility variations are spatially different in terms of both amplitude and frequencies. Cross-spectral results of a loess grain-size stack with benthic oxygen isotope and orbital parameters reveal that ice volume has played a more dominant (70-75%) role than insolation (25-30%) in driving orbital-scale winter monsoon fluctuation. Comparison of high-frequency (<9 ka) components of the loess and speleothem proxies with the North Atlantic and ice-core records reveals that millennial-scale abrupt events are persistent and comparable during glacial periods. However, the magnitudes of abrupt climate events are quite different among these records during interglacials, implying that dynamics of abrupt climate changes are likely dissimilar under different glacial and interglacial boundary conditions. Integration of terrestrial, marine, and ice-core records suggests that future research should focus on quantitatively reconstructing millennial-scale changes in temperature and precipitation independently, and dynamically assessing co-evolution of orbital and millennial climate variability. Report ice core North Atlantic Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences) Earth-Science Reviews 220 103731 |
institution |
Open Polar |
collection |
Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchacadscgigcas |
language |
English |
topic |
Geology Chinese loess Stalagmites East Asian monsoon Orbital-and millennial-scale variability Monsoon dynamics Geosciences Multidisciplinary EAST-ASIAN MONSOON EMPIRICAL MODE DECOMPOSITION MAJOR GLACIATION CYCLES SUMMER MONSOON GLOBAL MONSOON WINTER MONSOON NORTH-ATLANTIC GRAIN-SIZE MAGNETIC-SUSCEPTIBILITY |
spellingShingle |
Geology Chinese loess Stalagmites East Asian monsoon Orbital-and millennial-scale variability Monsoon dynamics Geosciences Multidisciplinary EAST-ASIAN MONSOON EMPIRICAL MODE DECOMPOSITION MAJOR GLACIATION CYCLES SUMMER MONSOON GLOBAL MONSOON WINTER MONSOON NORTH-ATLANTIC GRAIN-SIZE MAGNETIC-SUSCEPTIBILITY Sun, Youbin Clemens, Steven C. Guo, Fei Liu, Xingxing Wang, Yang Yan, Yan Liang, Lianji High-sedimentation-rate loess records: A new window into understanding orbital- and millennial-scale monsoon variability |
topic_facet |
Geology Chinese loess Stalagmites East Asian monsoon Orbital-and millennial-scale variability Monsoon dynamics Geosciences Multidisciplinary EAST-ASIAN MONSOON EMPIRICAL MODE DECOMPOSITION MAJOR GLACIATION CYCLES SUMMER MONSOON GLOBAL MONSOON WINTER MONSOON NORTH-ATLANTIC GRAIN-SIZE MAGNETIC-SUSCEPTIBILITY |
description |
Chinese loess and stalagmites are two classic terrestrial archives that have been intensively studied to reconstruct the characteristics and dynamics of orbital- and millennial-scale monsoon variability. However, comparability between these two representative records remains contested due to chronological uncertainty and proxy complexity. Here five high-sedimentation-rate loess records on the Chinese Loess Plateau are investigated to assess East Asian monsoon variability at orbital and millennial timescales. By correlating loess grain size (a winter monsoon proxy) to speleothem 818O (a summer monsoon proxy), we establish an independent speleothem-based chronology for Chinese loess-paleosol sequences over the past 640 ka. The synchronized loess grain-size records indicate that winter monsoon variability is spatially consistent on glacial-interglacial to millennial timescales, exhibiting distinctive precession- and millennial-scale changes similar to those of speleothem 818O records. However, as affected by the complex processes of deposition and weathering, magnetic susceptibility variations are spatially different in terms of both amplitude and frequencies. Cross-spectral results of a loess grain-size stack with benthic oxygen isotope and orbital parameters reveal that ice volume has played a more dominant (70-75%) role than insolation (25-30%) in driving orbital-scale winter monsoon fluctuation. Comparison of high-frequency (<9 ka) components of the loess and speleothem proxies with the North Atlantic and ice-core records reveals that millennial-scale abrupt events are persistent and comparable during glacial periods. However, the magnitudes of abrupt climate events are quite different among these records during interglacials, implying that dynamics of abrupt climate changes are likely dissimilar under different glacial and interglacial boundary conditions. Integration of terrestrial, marine, and ice-core records suggests that future research should focus on quantitatively reconstructing millennial-scale changes in temperature and precipitation independently, and dynamically assessing co-evolution of orbital and millennial climate variability. |
format |
Report |
author |
Sun, Youbin Clemens, Steven C. Guo, Fei Liu, Xingxing Wang, Yang Yan, Yan Liang, Lianji |
author_facet |
Sun, Youbin Clemens, Steven C. Guo, Fei Liu, Xingxing Wang, Yang Yan, Yan Liang, Lianji |
author_sort |
Sun, Youbin |
title |
High-sedimentation-rate loess records: A new window into understanding orbital- and millennial-scale monsoon variability |
title_short |
High-sedimentation-rate loess records: A new window into understanding orbital- and millennial-scale monsoon variability |
title_full |
High-sedimentation-rate loess records: A new window into understanding orbital- and millennial-scale monsoon variability |
title_fullStr |
High-sedimentation-rate loess records: A new window into understanding orbital- and millennial-scale monsoon variability |
title_full_unstemmed |
High-sedimentation-rate loess records: A new window into understanding orbital- and millennial-scale monsoon variability |
title_sort |
high-sedimentation-rate loess records: a new window into understanding orbital- and millennial-scale monsoon variability |
publisher |
ELSEVIER |
publishDate |
2021 |
url |
http://ir.gig.ac.cn/handle/344008/62758 https://doi.org/10.1016/j.earscirev.2021.103731 |
genre |
ice core North Atlantic |
genre_facet |
ice core North Atlantic |
op_relation |
EARTH-SCIENCE REVIEWS http://ir.gig.ac.cn/handle/344008/62758 doi:10.1016/j.earscirev.2021.103731 |
op_doi |
https://doi.org/10.1016/j.earscirev.2021.103731 |
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Earth-Science Reviews |
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220 |
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103731 |
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1766029417443753984 |