Sustained North Atlantic warming drove anomalously intense MIS 11c interglacial

Hsun-Ming Hu (), Gianluca Marino (), Carlos Pérez-Mejías, Christoph Spötl, Yusuke Yokoyama, Jimin Yu, Eelco Rohling, Akihiro Kano, Patrick Ludwig, Joaquim G. Pinto, Véronique Michel, Patricia Valensi, Xin Zhang, Xiuyang Jiang, Horng-Sheng Mii, Wei-Yi Chien, Hsien-Chen Tsai, Wen-Hui Sung, Chia-Hao Hsu, Elisabetta Starnini, Marta Zunino and Chuan-Chou Shen ()
Additional contact information
Hsun-Ming Hu: National Taiwan University
Gianluca Marino: Palaeoclimatology Lab, Universidade de Vigo
Carlos Pérez-Mejías: Xi’an Jiaotong University
Christoph Spötl: University of Innsbruck
Yusuke Yokoyama: The University of Tokyo
Jimin Yu: Laoshan Laboratory
Eelco Rohling: Utrecht University
Akihiro Kano: The University of Tokyo
Patrick Ludwig: Karlsruhe Institute of Technology (KIT)
Joaquim G. Pinto: Karlsruhe Institute of Technology (KIT)
Véronique Michel: CEPAM
Patricia Valensi: Institut de Paléontologie Humaine
Xin Zhang: Fujian Normal University
Xiuyang Jiang: Fujian Normal University
Horng-Sheng Mii: National Taiwan Normal University
Wei-Yi Chien: National Taiwan University
Hsien-Chen Tsai: National Taiwan University
Wen-Hui Sung: National Taiwan University
Chia-Hao Hsu: National Taiwan University
Elisabetta Starnini: University of Pisa
Marta Zunino: Piazzale D. Maineri 1
Chuan-Chou Shen: National Taiwan University

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract The Marine Isotope Stage (MIS) 11c interglacial and its preceding glacial termination represent an enigmatically intense climate response to relatively weak insolation forcing. So far, a lack of radiometric age control has confounded a detailed assessment of the insolation-climate relationship during this period. Here, we present 230Th-dated speleothem proxy data from northern Italy and compare them with palaeoclimate records from the North Atlantic region. We find that interglacial conditions started in subtropical to middle latitudes at 423.1 ± 1.3 thousand years (kyr) before present, during a first weak insolation maximum, whereas northern high latitudes remained glaciated (sea level ~ 40 m below present). Some 14.5 ± 2.8 kyr after this early subtropical onset, peak interglacial conditions were reached globally, with sea level 6–13 m above present, despite weak insolation forcing. We attribute this remarkably intense climate response to an exceptionally long (~15 kyr) episode of intense poleward heat flux transport prior to the MIS 11c optimum.

Date: 2024
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DOI: 10.1038/s41467-024-50207-1

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