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Precession-band variance missing from East Asian monsoon runoff

Author

Listed:
  • S. C. Clemens

    (Brown University)

  • A. Holbourn

    (Christian-Albrechts-University)

  • Y. Kubota

    (National Museum of Nature and Science)

  • K. E. Lee

    (Korea Maritime and Ocean University)

  • Z. Liu

    (The Ohio State University)

  • G. Chen

    (Chinese Academy of Sciences)

  • A. Nelson

    (Brown University)

  • B. Fox-Kemper

    (Brown University)

Abstract

Speleothem CaCO3 δ18O is a commonly employed paleomonsoon proxy. However, inferring local rainfall amount from speleothem δ18O can be complicated due to changing source water δ18O, temperature effects, and rainout over the moisture transport path. These complications are addressed using δ18O of planktonic foraminiferal CaCO3, offshore from the Yangtze River Valley (YRV). The advantage is that the effects of global seawater δ18O and local temperature changes can be quantitatively removed, yielding a record of local seawater δ18O, a proxy that responds primarily to dilution by local precipitation and runoff. Whereas YRV speleothem δ18O is dominated by precession-band (23 ky) cyclicity, local seawater δ18O is dominated by eccentricity (100 ky) and obliquity (41 ky) cycles, with almost no precession-scale variance. These results, consistent with records outside the YRV, suggest that East Asian monsoon rainfall is more sensitive to greenhouse gas and high-latitude ice sheet forcing than to direct insolation forcing.

Suggested Citation

  • S. C. Clemens & A. Holbourn & Y. Kubota & K. E. Lee & Z. Liu & G. Chen & A. Nelson & B. Fox-Kemper, 2018. "Precession-band variance missing from East Asian monsoon runoff," Nature Communications, Nature, vol. 9(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05814-0
    DOI: 10.1038/s41467-018-05814-0
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    Cited by:

    1. Yukun Zheng & Hongyan Liu & Huan Yang & Hongya Wang & Wenjie Zhao & Zeyu Zhang & Miao Huang & Weihang Liu, 2022. "Decoupled Asian monsoon intensity and precipitation during glacial-interglacial transitions on the Chinese Loess Plateau," Nature Communications, Nature, vol. 13(1), pages 1-13, December.
    2. Xusheng Li & Yuwen Zhou & Zhiyong Han & Xiaokang Yuan & Shuangwen Yi & Yuqiang Zeng & Lisha Qin & Ming Lu & Huayu Lu, 2024. "Loess deposits in the low latitudes of East Asia reveal the ~20-kyr precipitation cycle," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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