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.
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.
the Creative Commons Attribution 4.0 License.
Greenhouse gases modulate the strength of millennial-scale subtropical rainfall, consistent with future predictions
Institute of Marine Science and Technology, Shandong University,
Qingdao 266237, China
State Key Laboratory of Loess and Quaternary Geology, Institute of
Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China
Department of Earth, Environmental, and Planetary Sciences, Brown
University, Providence, RI 02912-1846, USA
Steven Clemens
CORRESPONDING AUTHOR
Department of Earth, Environmental, and Planetary Sciences, Brown
University, Providence, RI 02912-1846, USA
Yuming Liu
State Key Laboratory of Loess and Quaternary Geology, Institute of
Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China
University of Chinese Academy of Sciences, Beijing 100049, China
Ting Wang
State Key Laboratory of Loess and Quaternary Geology, Institute of
Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China
University of Chinese Academy of Sciences, Beijing 100049, China
Huimin Fan
State Key Laboratory of Loess and Quaternary Geology, Institute of
Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China
Xingxing Liu
State Key Laboratory of Loess and Quaternary Geology, Institute of
Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China
Youbin Sun
State Key Laboratory of Loess and Quaternary Geology, Institute of
Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China
Institute of Global Environmental Change, Xi'an Jiaotong University,
Xi'an 710061, China
Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266200, China
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In this study, we use the distribution of soil bacterial membrane lipids stored on the Chinese Loess Plateau (CLP) to quantitatively reconstruct variations in precipitation amount over the past 130 kyr. The precipitation record shows orbital- and millennial-scale variations and varies at precession and obliquity scale. The application of this precipitation proxy across the CLP indicates a more pronounced spatial gradient during glacials, when the western CLP experiences more arid conditions.
Peter D. Clift, Christian Betzler, Steven C. Clemens, Beth Christensen, Gregor P. Eberli, Christian France-Lanord, Stephen Gallagher, Ann Holbourn, Wolfgang Kuhnt, Richard W. Murray, Yair Rosenthal, Ryuji Tada, and Shiming Wan
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Since the orbital parameters of the past are different from today, applying the modern calendar to the past climate can lead to an artificial bias in seasonal cycles. With the use of multiple model outputs, we found that such a bias is non-ignorable and should be corrected to ensure an accurate comparison between modeled results and observational records, as well as between simulated past and modern climates, especially for the Last Interglacial.
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Earth has experienced remarkable climate–environmental changes in the last 65 million years. The Weihe Basin with its 6000–8000 m infill of a continuous sedimentary sequence gives a unique continental archive for the study of the Cenozoic environment and exploration of deep biospheres. This workshop report concludes key objectives of the two-phase Weihe Basin Drilling Project and the global significance of reconstructing Cenozoic climate evolution and tectonic–monsoon interaction in East Asia.
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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.
Our high-resolution loess Ca/Ti record displays millennial monsoon oscillations that persist...