Detection of abrupt changes in East Asian monsoon from Chinese loess and speleothem records
International audience Abrupt climate changes, especially at millennial timescales, have become a key topic in paleoclimatology because of their link with the tipping point theory and their extensive impacts on future climate scenarios. Although best documented in ice-cores and marine sediments, the...
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Online Access: | https://insu.hal.science/insu-04195487 https://doi.org/10.1016/j.gloplacha.2023.104154 |
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ftccsdartic:oai:HAL:insu-04195487v1 2023-10-09T21:52:22+02:00 Detection of abrupt changes in East Asian monsoon from Chinese loess and speleothem records Rousseau, Denis-Didier Bagniewski, Witold Sun, Youbin Géosciences Montpellier Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) 2023 https://insu.hal.science/insu-04195487 https://doi.org/10.1016/j.gloplacha.2023.104154 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gloplacha.2023.104154 insu-04195487 https://insu.hal.science/insu-04195487 BIBCODE: 2023GPC.22704154R doi:10.1016/j.gloplacha.2023.104154 ISSN: 0921-8181 Global and Planetary Change https://insu.hal.science/insu-04195487 Global and Planetary Change, 2023, 227, ⟨10.1016/j.gloplacha.2023.104154⟩ Abrupt climate transitions Chinese loess sequences Millennial scale variability Grain size East Asian Monsoon Stepwise increasing of the monsoon intensity Earth Science [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2023 ftccsdartic https://doi.org/10.1016/j.gloplacha.2023.104154 2023-09-23T22:59:46Z International audience Abrupt climate changes, especially at millennial timescales, have become a key topic in paleoclimatology because of their link with the tipping point theory and their extensive impacts on future climate scenarios. Although best documented in ice-cores and marine sediments, they are also recorded in different archives on the land, among which Chinese loess and speleothem records are of particular interest. These records effectively document orbital-to-millennial monsoon variability during the Pleistocene, but the dominant periodicity revealed by proxy records from these two types of archives is different. Nevertheless, millennial-scale oscillations recorded in Chinese loess and speleothem records seem highly similar over the last several glacial cycles. Such millennial fluctuations can be of varying amplitudes, and either more or less abrupt depending on the type of record. The observed abruptness usually depends on the sedimentation rates and sampling resolution in the loess and speleothem records. However, it can also be refined by comparisons with multiple physicochemical and isotopic proxies. Here, we apply a robust statistical method to detect abrupt changes in loess grain size and speleothem δ 18 O records. As a first step, we compared two reference records (i.e. the NGRIP ice-core and the Hulu speleothem δ 18 O records) of abrupt climate change to verify the robustness of our method in detecting the well-recognized abrupt events during the last glaciation. This result allows us, in a second step, to compare two high-resolution loess grain-size stacks (i.e. the CHILOMOS, and the LGS640 datasets) with the Chinese speleothem composite record built from Hulu and Sanbao records. Although visually observed rapid grain-size variations were previously interpreted as representing millennial-scale variations, our statistical analysis confirms that whether these abrupt climate changes can be robustly identified is highly dependent on the time resolution of the studied records. In a third ... Article in Journal/Newspaper ice core NGRIP Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Hulu ENVELOPE(8.610,8.610,62.837,62.837) Global and Planetary Change 227 104154 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Abrupt climate transitions Chinese loess sequences Millennial scale variability Grain size East Asian Monsoon Stepwise increasing of the monsoon intensity Earth Science [SDU]Sciences of the Universe [physics] |
spellingShingle |
Abrupt climate transitions Chinese loess sequences Millennial scale variability Grain size East Asian Monsoon Stepwise increasing of the monsoon intensity Earth Science [SDU]Sciences of the Universe [physics] Rousseau, Denis-Didier Bagniewski, Witold Sun, Youbin Detection of abrupt changes in East Asian monsoon from Chinese loess and speleothem records |
topic_facet |
Abrupt climate transitions Chinese loess sequences Millennial scale variability Grain size East Asian Monsoon Stepwise increasing of the monsoon intensity Earth Science [SDU]Sciences of the Universe [physics] |
description |
International audience Abrupt climate changes, especially at millennial timescales, have become a key topic in paleoclimatology because of their link with the tipping point theory and their extensive impacts on future climate scenarios. Although best documented in ice-cores and marine sediments, they are also recorded in different archives on the land, among which Chinese loess and speleothem records are of particular interest. These records effectively document orbital-to-millennial monsoon variability during the Pleistocene, but the dominant periodicity revealed by proxy records from these two types of archives is different. Nevertheless, millennial-scale oscillations recorded in Chinese loess and speleothem records seem highly similar over the last several glacial cycles. Such millennial fluctuations can be of varying amplitudes, and either more or less abrupt depending on the type of record. The observed abruptness usually depends on the sedimentation rates and sampling resolution in the loess and speleothem records. However, it can also be refined by comparisons with multiple physicochemical and isotopic proxies. Here, we apply a robust statistical method to detect abrupt changes in loess grain size and speleothem δ 18 O records. As a first step, we compared two reference records (i.e. the NGRIP ice-core and the Hulu speleothem δ 18 O records) of abrupt climate change to verify the robustness of our method in detecting the well-recognized abrupt events during the last glaciation. This result allows us, in a second step, to compare two high-resolution loess grain-size stacks (i.e. the CHILOMOS, and the LGS640 datasets) with the Chinese speleothem composite record built from Hulu and Sanbao records. Although visually observed rapid grain-size variations were previously interpreted as representing millennial-scale variations, our statistical analysis confirms that whether these abrupt climate changes can be robustly identified is highly dependent on the time resolution of the studied records. In a third ... |
author2 |
Géosciences Montpellier Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) |
format |
Article in Journal/Newspaper |
author |
Rousseau, Denis-Didier Bagniewski, Witold Sun, Youbin |
author_facet |
Rousseau, Denis-Didier Bagniewski, Witold Sun, Youbin |
author_sort |
Rousseau, Denis-Didier |
title |
Detection of abrupt changes in East Asian monsoon from Chinese loess and speleothem records |
title_short |
Detection of abrupt changes in East Asian monsoon from Chinese loess and speleothem records |
title_full |
Detection of abrupt changes in East Asian monsoon from Chinese loess and speleothem records |
title_fullStr |
Detection of abrupt changes in East Asian monsoon from Chinese loess and speleothem records |
title_full_unstemmed |
Detection of abrupt changes in East Asian monsoon from Chinese loess and speleothem records |
title_sort |
detection of abrupt changes in east asian monsoon from chinese loess and speleothem records |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://insu.hal.science/insu-04195487 https://doi.org/10.1016/j.gloplacha.2023.104154 |
long_lat |
ENVELOPE(8.610,8.610,62.837,62.837) |
geographic |
Hulu |
geographic_facet |
Hulu |
genre |
ice core NGRIP |
genre_facet |
ice core NGRIP |
op_source |
ISSN: 0921-8181 Global and Planetary Change https://insu.hal.science/insu-04195487 Global and Planetary Change, 2023, 227, ⟨10.1016/j.gloplacha.2023.104154⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gloplacha.2023.104154 insu-04195487 https://insu.hal.science/insu-04195487 BIBCODE: 2023GPC.22704154R doi:10.1016/j.gloplacha.2023.104154 |
op_doi |
https://doi.org/10.1016/j.gloplacha.2023.104154 |
container_title |
Global and Planetary Change |
container_volume |
227 |
container_start_page |
104154 |
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1779315518200610816 |