Timing and structure of the Younger Dryas event and its underlying climate dynamics

Media type: E-Article
Title: Timing and structure of the Younger Dryas event and its underlying climate dynamics
Contributor: Cheng, Hai; Zhang, Haiwei; Spötl, Christoph; Baker, Jonathan; Sinha, Ashish; Li, Hanying; Bartolomé, Miguel; Moreno, Ana; Kathayat, Gayatri; Zhao, Jingyao; Dong, Xiyu; Li, Youwei; Ning, Youfeng; Jia, Xue; Zong, Baoyun; Ait Brahim, Yassine; Pérez-Mejías, Carlos; Cai, Yanjun; Novello, Valdir F.; Cruz, Francisco W.; Severinghaus, Jeffrey P.; An, Zhisheng; Edwards, R. Lawrence
Published: Proceedings of the National Academy of Sciences, 2020
Published in: Proceedings of the National Academy of Sciences, 117 (2020) 38, Seite 23408-23417
Language: English
DOI: 10.1073/pnas.2007869117
ISSN: 0027-8424; 1091-6490
Origination:
Footnote:
Description: Significance The Younger Dryas (YD) was an ∼1,300-y period of extreme climate that dramatically reversed the course of global warming that brought the last Ice Age to a close. Understanding what mechanisms triggered and terminated this event remains enigmatic, but it is fundamental for gaining insights into the inner workings of Earth’s climate system. In this study, we used a combination of well-dated speleothem and ice-core records to pinpoint the timing of its onsets and terminations in various climatic regimes around the world. We show that the YD event occurred first at high northern latitudes and then propagated southward into the tropical monsoon belt through both atmospheric and oceanic processes, ultimately reaching Antarctica before reversing the course to its eventual termination.
Access State: Open Access

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