Mid-Pleistocene climate transition triggered by Antarctic Ice Sheet growth

Author:

An Zhisheng123ORCID,Zhou Weijian123ORCID,Zhang Zeke124ORCID,Zhang Xu56ORCID,Liu Zhonghui17ORCID,Sun Youbin12ORCID,Clemens Steven C.8ORCID,Wu Lixin910ORCID,Zhao Jiaju12ORCID,Shi Zhengguo12,Ma Xiaolin1ORCID,Yan Hong12ORCID,Li Gaojun4ORCID,Cai Yanjun2ORCID,Yu Jimin911ORCID,Sun Yuchen12ORCID,Li Siqi5ORCID,Zhang Yu’ao5ORCID,Stepanek Christian12ORCID,Lohmann Gerrit12,Dong Guocheng1,Cheng Hai2ORCID,Liu Yu1ORCID,Jin Zhangdong12ORCID,Li Tao13ORCID,Hao Yifei1,Lei Jing114,Cai Wenju1910ORCID

Affiliation:

1. State Key Laboratory of Loess Science, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China.

2. Institute of Global Environmental Change, Xi’an Jiaotong University, Xi’an 710049, China.

3. Interdisciplinary Research Center of Earth Science Frontier, Beijing Normal University, Beijing 100875, China.

4. Department of Earth and Planetary Sciences, Nanjing University, Nanjing 210023, China.

5. State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China.

6. British Antarctic Survey, Cambridge CB3 0ET, UK.

7. Department of Earth Sciences, The University of Hong Kong, Hong Kong, China.

8. Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, USA.

9. Laoshan Laboratory, Qingdao 266000, China.

10. Key Laboratory of Physical Oceanography/Institute for Advanced Ocean Studies, Ocean University of China, Qingdao 266100, China.

11. Research School of Earth Sciences, Australian National University, Canberra, ACT 2601, Australia.

12. Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, 27570 Bremerhaven, Germany.

13. Key Laboratory of Palaeobiology and Petroleum Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China.

14. Xi’an Institute for Innovative Earth Environment Research, Xi’an 710061, China.

Abstract

Despite extensive investigation, the nature and causes of the Mid-Pleistocene Transition remain enigmatic. In this work, we assess its linkage to asynchronous development of bipolar ice sheets by synthesizing Pleistocene mid- to high-latitude proxy records linked to hemispheric ice sheet evolution. Our results indicate substantial growth of the Antarctic Ice Sheets (AISs) at 2.0 to 1.25 million years ago, preceding the rapid expansion of Northern Hemisphere Ice Sheets after ~1.25 million years ago. Proxy-model comparisons suggest that AIS and associated Southern Ocean sea ice expansion can induce northern high-latitude cooling and enhanced moisture transport to the Northern Hemisphere, thus triggering the Mid-Pleistocene Transition. The dynamic processes involved are crucial for assessing modern global warming that is already inducing asynchronous bipolar melting of ice sheets.

Publisher

American Association for the Advancement of Science (AAAS)

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