Eccentricity-paced geomagnetic field and monsoon rainfall variations over the last 870 kyr

Weijian Zhou; Xianghui Kong; Greig A. Paterson; Youbin Sun; Yubin Wu; Hong Ao; Feng Xian; Yajuan Du; Ling Tang; Jie Zhou; Zhengguo Shi; A. J.Jull Timothy; Guoqing Zhao; Zhisheng An

doi:10.1073/pnas.2211495120

Eccentricity-paced geomagnetic field and monsoon rainfall variations over the last 870 kyr

Weijian Zhou
, Xianghui Kong
, Greig A. Paterson
, Youbin Sun
, Yubin Wu
, Hong Ao
, Feng Xian
, Yajuan Du
, Ling Tang
, Jie Zhou
, Zhengguo Shi
, A. J.Jull Timothy
, Guoqing Zhao
, Zhisheng An

School of Human Settlements and Civil Engineering

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

Whether there are links between geomagnetic field and Earth’s orbital parameters remains unclear. Synchronous reconstructions of parallel long-term quantitative geomagnetic field and climate change records are rare. Here, we present ¹⁰Be-derived changes of both geomagnetic field and Asian monsoon (AM) rainfall over the last 870 kyr from the Xifeng loess–paleosol sequence on the central Chinese Loess Plateau. The ¹⁰Be_GM flux (a proxy for geomagnetic field-induced ¹⁰Be production rate) reveals 13 consecutive geomagnetic excursions in the Brunhes chron, which are synchronized with the global records, providing key time markers for Chinese loess–paleosol sequences. The ¹⁰Be-derived rainfall exhibits distinct ~100 kyr glacial–interglacial cycles, and superimposed precessional (~23 kyr) cycles that match with those in Chinese speleothem δ¹⁸O record. We find that changes in the geomagnetic field and AM rainfall share a common ~100 kyr cyclicity, implying a likely eccentricity modulation of both the geomagnetic field and climate.

Original language	English
Article number	e2211495120
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	120
Issue number	17
DOIs	https://doi.org/10.1073/pnas.2211495120
State	Published - 25 Apr 2023

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10.1073/pnas.2211495120

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Zhou, W., Kong, X., Paterson, G. A., Sun, Y., Wu, Y., Ao, H., Xian, F., Du, Y., Tang, L., Zhou, J., Shi, Z., Timothy, A. J. J., Zhao, G., & An, Z. (2023). Eccentricity-paced geomagnetic field and monsoon rainfall variations over the last 870 kyr. Proceedings of the National Academy of Sciences of the United States of America, 120(17), Article e2211495120. https://doi.org/10.1073/pnas.2211495120

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abstract = "Whether there are links between geomagnetic field and Earth{\textquoteright}s orbital parameters remains unclear. Synchronous reconstructions of parallel long-term quantitative geomagnetic field and climate change records are rare. Here, we present 10Be-derived changes of both geomagnetic field and Asian monsoon (AM) rainfall over the last 870 kyr from the Xifeng loess–paleosol sequence on the central Chinese Loess Plateau. The 10BeGM flux (a proxy for geomagnetic field-induced 10Be production rate) reveals 13 consecutive geomagnetic excursions in the Brunhes chron, which are synchronized with the global records, providing key time markers for Chinese loess–paleosol sequences. The 10Be-derived rainfall exhibits distinct \textasciitilde{}100 kyr glacial–interglacial cycles, and superimposed precessional (\textasciitilde{}23 kyr) cycles that match with those in Chinese speleothem δ18O record. We find that changes in the geomagnetic field and AM rainfall share a common \textasciitilde{}100 kyr cyclicity, implying a likely eccentricity modulation of both the geomagnetic field and climate.",

author = "Weijian Zhou and Xianghui Kong and Paterson, \{Greig A.\} and Youbin Sun and Yubin Wu and Hong Ao and Feng Xian and Yajuan Du and Ling Tang and Jie Zhou and Zhengguo Shi and Timothy, \{A. J.Jull\} and Guoqing Zhao and Zhisheng An",

note = "Publisher Copyright: Copyright {\textcopyright} 2023 the Author(s). Published by PNAS. This article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).",

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Zhou, W, Kong, X, Paterson, GA, Sun, Y, Wu, Y, Ao, H, Xian, F, Du, Y, Tang, L, Zhou, J, Shi, Z, Timothy, AJJ, Zhao, G & An, Z 2023, 'Eccentricity-paced geomagnetic field and monsoon rainfall variations over the last 870 kyr', Proceedings of the National Academy of Sciences of the United States of America, vol. 120, no. 17, e2211495120. https://doi.org/10.1073/pnas.2211495120

TY - JOUR

T1 - Eccentricity-paced geomagnetic field and monsoon rainfall variations over the last 870 kyr

AU - Zhou, Weijian

AU - Kong, Xianghui

AU - Paterson, Greig A.

AU - Sun, Youbin

AU - Wu, Yubin

AU - Ao, Hong

AU - Xian, Feng

AU - Du, Yajuan

AU - Tang, Ling

AU - Zhou, Jie

AU - Shi, Zhengguo

AU - Timothy, A. J.Jull

AU - Zhao, Guoqing

AU - An, Zhisheng

PY - 2023/4/25

Y1 - 2023/4/25

N2 - Whether there are links between geomagnetic field and Earth’s orbital parameters remains unclear. Synchronous reconstructions of parallel long-term quantitative geomagnetic field and climate change records are rare. Here, we present 10Be-derived changes of both geomagnetic field and Asian monsoon (AM) rainfall over the last 870 kyr from the Xifeng loess–paleosol sequence on the central Chinese Loess Plateau. The 10BeGM flux (a proxy for geomagnetic field-induced 10Be production rate) reveals 13 consecutive geomagnetic excursions in the Brunhes chron, which are synchronized with the global records, providing key time markers for Chinese loess–paleosol sequences. The 10Be-derived rainfall exhibits distinct ~100 kyr glacial–interglacial cycles, and superimposed precessional (~23 kyr) cycles that match with those in Chinese speleothem δ18O record. We find that changes in the geomagnetic field and AM rainfall share a common ~100 kyr cyclicity, implying a likely eccentricity modulation of both the geomagnetic field and climate.

AB - Whether there are links between geomagnetic field and Earth’s orbital parameters remains unclear. Synchronous reconstructions of parallel long-term quantitative geomagnetic field and climate change records are rare. Here, we present 10Be-derived changes of both geomagnetic field and Asian monsoon (AM) rainfall over the last 870 kyr from the Xifeng loess–paleosol sequence on the central Chinese Loess Plateau. The 10BeGM flux (a proxy for geomagnetic field-induced 10Be production rate) reveals 13 consecutive geomagnetic excursions in the Brunhes chron, which are synchronized with the global records, providing key time markers for Chinese loess–paleosol sequences. The 10Be-derived rainfall exhibits distinct ~100 kyr glacial–interglacial cycles, and superimposed precessional (~23 kyr) cycles that match with those in Chinese speleothem δ18O record. We find that changes in the geomagnetic field and AM rainfall share a common ~100 kyr cyclicity, implying a likely eccentricity modulation of both the geomagnetic field and climate.

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DO - 10.1073/pnas.2211495120

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JO - Proceedings of the National Academy of Sciences of the United States of America

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M1 - e2211495120

ER -

Eccentricity-paced geomagnetic field and monsoon rainfall variations over the last 870 kyr

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