Greenhouse gases modulate the strength of millennial-scale subtropical rainfall, consistent with future predictions

Guo, Fei; Clemens, Steven; Liu, Yuming; Wang, Ting; Fan, Huimin; Liu, Xingxing; Sun, Youbin

doi:https://doi.org/10.5194/cp-18-1675-2022

Articles | Volume 18, issue 7

https://doi.org/10.5194/cp-18-1675-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/cp-18-1675-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 7

Research article

|

20 Jul 2022

Research article |

| 20 Jul 2022

Greenhouse gases modulate the strength of millennial-scale subtropical rainfall, consistent with future predictions

Fei Guo, Steven Clemens, Yuming Liu, Ting Wang, Huimin Fan, Xingxing Liu, and Youbin Sun

Supplement

https://doi.org/10.5194/cp-18-1675-2022-supplement

Data sets

High-sedimentation-rate loess records: A new window into understanding orbital-and millennial-scale monsoon variability (https://www.doi.org/10.12262/IEECAS.EAPSD2021002) Y. Sun, S. Clemens, F. Guo, X. Liu, Y. Wang, Y. Yan, and L. Liang https://doi.org/10.1016/j.earscirev.2021.103731

Model code and software

Application of the cross wavelet transform and wavelet coherence to geophysical time series (http://grinsted.github.io/wavelet-coherence/) A. Grinsted, J. C. Moore, and S. Jevrejeva https://doi.org/10.5194/npg-11-561-2004

Short summary

Our high-resolution loess Ca/Ti record displays millennial monsoon oscillations that persist over the last 650 kyr. Wavelet results indicate the ice volume and GHG co-modulation at the 100 kyr band and GHG and local insolation forcing at the precession band for the magnitude of millennial monsoon variability of loess Ca/Ti. The inferred mechanism calls on dynamic linkages to variability in AMOC. At the precession band, combined effects of GHG and insolation lead to increased extreme rainfall.