Coupled atmosphere-ice-ocean dynamics during Heinrich Stadial 2

Xiyu Dong, Gayatri Kathayat (), Sune O. Rasmussen, Anders Svensson, Jeffrey P. Severinghaus, Hanying Li, Ashish Sinha, Yao Xu, Haiwei Zhang, Zhengguo Shi, Yanjun Cai, Carlos Pérez-Mejías, Jonathan Baker, Jingyao Zhao, Christoph Spötl, Andrea Columbu, Youfeng Ning, Nicolás M. Stríkis, Shitao Chen, Xianfeng Wang, Anil K. Gupta, Som Dutt, Fan Zhang, Francisco W. Cruz, Zhisheng An, R. Lawrence Edwards and Hai Cheng ()
Additional contact information
Xiyu Dong: Xi’an Jiaotong University
Gayatri Kathayat: Xi’an Jiaotong University
Sune O. Rasmussen: University of Copenhagen
Anders Svensson: University of Copenhagen
Jeffrey P. Severinghaus: University of California San Diego
Hanying Li: Xi’an Jiaotong University
Ashish Sinha: Xi’an Jiaotong University
Yao Xu: Xi’an Jiaotong University
Haiwei Zhang: Xi’an Jiaotong University
Zhengguo Shi: Xi’an Jiaotong University
Yanjun Cai: Xi’an Jiaotong University
Carlos Pérez-Mejías: Xi’an Jiaotong University
Jonathan Baker: Xi’an Jiaotong University
Jingyao Zhao: Xi’an Jiaotong University
Christoph Spötl: University of Innsbruck
Andrea Columbu: University of Pisa
Youfeng Ning: Xi’an Jiaotong University
Nicolás M. Stríkis: Universidade Federal Fluminense
Shitao Chen: Nanjing Normal University
Xianfeng Wang: Nanyang Technological University
Anil K. Gupta: Indian Institute of Technology Kharagpur
Som Dutt: Wadia Institute of Himalayan Geology
Fan Zhang: Xi’an Jiaotong University
Francisco W. Cruz: Universidade de São Paulo
Zhisheng An: Chinese Academy of Sciences
R. Lawrence Edwards: University of Minnesota
Hai Cheng: Xi’an Jiaotong University

Nature Communications, 2022, vol. 13, issue 1, 1-14

Abstract: Abstract Our understanding of climate dynamics during millennial-scale events is incomplete, partially due to the lack of their precise phase analyses under various boundary conditions. Here we present nine speleothem oxygen-isotope records from mid-to-low-latitude monsoon regimes with sub-centennial age precision and multi-annual resolution, spanning the Heinrich Stadial 2 (HS2) — a millennial-scale event that occurred at the Last Glacial Maximum. Our data suggests that the Greenland and Antarctic ice-core chronologies require +320- and +400-year adjustments, respectively, supported by extant volcanic evidence and radiocarbon ages. Our chronological framework shows a synchronous HS2 onset globally. Our records precisely characterize a centennial-scale abrupt “tropical atmospheric seesaw” superimposed on the conventional “bipolar seesaw” at the beginning of HS2, implying a unique response/feedback from low-latitude hydroclimate. Together with our observation of an early South American monsoon shift at the HS2 termination, we suggest a more active role of low-latitude hydroclimate dynamics underlying millennial events than previously thought.

Date: 2022
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DOI: 10.1038/s41467-022-33583-4

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