Role of land-ocean interactions in stepwise Northern Hemisphere Glaciation

Yi Zhong (), Ning Tan (), Jordan T. Abell, Chijun Sun, Stefanie Kaboth-Bahr, Heather L. Ford, Timothy D. Herbert, Alex Pullen, Keiji Horikawa, Jimin Yu, Torben Struve, Michael E. Weber, Peter D. Clift, Juan C. Larrasoaña, Zhengyao Lu, Hu Yang, André Bahr, Tianyu Chen, Jingyu Zhang, Cao Wei, Wenyue Xia, Sheng Yang and Qingsong Liu ()
Additional contact information
Yi Zhong: Southern University of Science and Technology
Ning Tan: Chinese Academy of Sciences
Jordan T. Abell: Lehigh University
Chijun Sun: University of California Davis
Stefanie Kaboth-Bahr: Freie Universität Berlin
Heather L. Ford: Queen Mary University of London
Timothy D. Herbert: Brown University
Alex Pullen: Clemson University
Keiji Horikawa: University of Toyama
Jimin Yu: Laoshan Laboratory
Torben Struve: University of Oldenburg
Michael E. Weber: University of Bonn
Peter D. Clift: University College London
Juan C. Larrasoaña: Universidad Pública de Navarra
Zhengyao Lu: Lund University
Hu Yang: Southern Marine Science and Engineering Guangdong Laboratory
André Bahr: Heidelberg University
Tianyu Chen: Nanjing University
Jingyu Zhang: Southern University of Science and Technology
Cao Wei: Southern University of Science and Technology
Wenyue Xia: Southern University of Science and Technology
Sheng Yang: Southern University of Science and Technology
Qingsong Liu: Southern University of Science and Technology

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract The investigation of triggers causing the onset and intensification of Northern Hemisphere Glaciation (NHG) during the late Pliocene is essential for understanding the global climate system, with important implications for projecting future climate changes. Despite their critical roles in the global climate system, influences of land-ocean interactions on high-latitude ice sheets remain largely unexplored. Here, we present a high-resolution Asian dust record from Ocean Drilling Program Site 1208 in the North Pacific, which lies along the main route of the westerlies. Our data indicate that atmosphere-land-ocean interactions affected aeolian dust emissions through modulating moisture and vegetation in dust source regions, highlighting a critical role of terrestrial systems in initiating the NHG as early as 3.6 Myr ago. Combined with additional multi-proxy and model results, we further show that westerly wind strength was enhanced, mainly at low-to-middle tropospheric levels, during major glacial events at about 3.3 and 2.7 Myr ago. We suggest that coupled responses of Earth’s surface dynamics and atmospheric circulation in the Plio-Pleistocene likely involved feedbacks related to changes in paleogeography, ocean circulation, and global climate.

Date: 2024
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DOI: 10.1038/s41467-024-51127-w

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