A reliable benchmark of the last 640,000 years millennial climate variability

International audience How often have past climates undergone abrupt transitions? While our understanding of millennial variability during the past 130,000 years is well established, with precise dates available, such information on previous climate cycles is limited. To address this question, we id...

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Bibliographic Details
Published in:Scientific Reports
Main Authors: Rousseau, Denis-Didier, Bagniewski, Witold, Cheng, Hai
Other Authors: Lamont-Doherty Earth Observatory (LDEO), Columbia University New York, 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
Language:English
Published: HAL CCSD 2023
Subjects:
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
[SDE.MCG]Environmental Sciences/Global Changes
Greenland
North Atlantic
Online Access:https://hal.science/hal-04378547
https://hal.science/hal-04378547/document
https://hal.science/hal-04378547/file/s41598-023-49115-z.pdf
https://doi.org/10.1038/s41598-023-49115-z
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Summary:International audience How often have past climates undergone abrupt transitions? While our understanding of millennial variability during the past 130,000 years is well established, with precise dates available, such information on previous climate cycles is limited. To address this question, we identified 196 abrupt transitions in the δ 18 O record of the well-dated Chinese composite speleothem for the last 640,000 years. These results correspond to abrupt changes in the strength of the East Asian Monsoon, which align with the Greenland stadials and interstadials observed in the North Atlantic region during the last 130,000 years before present. These precise dates of past abrupt climate changes constitute a reliable and necessary benchmark for Earth System models used to study future climate scenarios.

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