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Orbital Asian summer monsoon dynamics revealed using an isotope-enabled global climate model

Author

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  • Thibaut Caley

    (Earth and Climate Cluster, Faculty of Earth and Life Sciences, Vrije Universiteit Amsterdam)

  • Didier M. Roche

    (Earth and Climate Cluster, Faculty of Earth and Life Sciences, Vrije Universiteit Amsterdam
    Laboratoire des Sciences du Climat et de l’Environnement (LSCE), CEA/CNRS-INSU/UVSQ)

  • Hans Renssen

    (Earth and Climate Cluster, Faculty of Earth and Life Sciences, Vrije Universiteit Amsterdam)

Abstract

The Asian summer monsoon dynamics at the orbital scale are a subject of considerable debate. The validity of Asian speleothem δ18O records as a proxy for summer monsoon intensity is questioned together with the ultimate forcing and timing of the monsoon. Here, using the results of a 150,000-year transient simulation including water isotopes, we demonstrate that Asian speleothem δ18O records are not a valid proxy for summer monsoon intensity only at the orbital timescale. Rather, our results show that these records reflect annual variations in hydrologic processes and circulation regime over a large part of the Indo-Asian region. Our results support the role of internal forcing, such as sea surface temperature in the equatorial Pacific, to modulate the timing of monsoon precipitation recorded in paleo-proxies inside the Asian region.

Suggested Citation

  • Thibaut Caley & Didier M. Roche & Hans Renssen, 2014. "Orbital Asian summer monsoon dynamics revealed using an isotope-enabled global climate model," Nature Communications, Nature, vol. 5(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6371
    DOI: 10.1038/ncomms6371
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    Cited by:

    1. Li Gong & Ann Holbourn & Wolfgang Kuhnt & Bradley Opdyke & Yan Zhang & Ana Christina Ravelo & Peng Zhang & Jian Xu & Kenji Matsuzaki & Ivano Aiello & Sebastian Beil & Nils Andersen, 2023. "Middle Pleistocene re-organization of Australian Monsoon," Nature Communications, Nature, vol. 14(1), pages 1-14, December.
    2. Xiyu Dong & Gayatri Kathayat & Sune O. Rasmussen & Anders Svensson & Jeffrey P. Severinghaus & Hanying Li & Ashish Sinha & Yao Xu & Haiwei Zhang & Zhengguo Shi & Yanjun Cai & Carlos Pérez-Mejías & Jon, 2022. "Coupled atmosphere-ice-ocean dynamics during Heinrich Stadial 2," Nature Communications, Nature, vol. 13(1), pages 1-14, December.
    3. María Fernanda Sánchez Goñi & Thomas Extier & Josué M. Polanco-Martínez & Coralie Zorzi & Teresa Rodrigues & André Bahr, 2023. "Moist and warm conditions in Eurasia during the last glacial of the Middle Pleistocene Transition," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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