Synchronous timing of abrupt climate changes during the last glacial period

Corrick, Ellen C. and Drysdale, Russell N. and Hellstrom, John C. and Capron, Emilie and Rasmussen, Sune Olander and Zhang, Xu and Fleitmann, Dominik and Couchoud, Isabelle and Wolff, Eric (2020) Synchronous timing of abrupt climate changes during the last glacial period. Science, 369 (6506). pp. 963-969. ISSN 0036-8075 (print), 1095-9203 (online) DOI https://doi.org/10.1126/science.aay5538

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Abstract

Many geographically dispersed records from across the globe reveal the occurrence of abrupt climate changes, called interstadial events, during the last glacial period. These events appear to have happened at the same time, but the difficulty of determining absolute dates in many of the records have made that proposition difficult to prove. Corrick et al. present results from 63 precisely dated speleothems that confirm the synchrony of those interstadial events. Their results also provide a tool with which to validate model simulations of abrupt climate change and calibrate other time series such as ice-core chronologies.Science, this issue p. 963Abrupt climate changes during the last glacial period have been detected in a global array of palaeoclimate records, but our understanding of their absolute timing and regional synchrony is incomplete. Our compilation of 63 published, independently dated speleothem records shows that abrupt warmings in Greenland were associated with synchronous climate changes across the Asian Monsoon, South American Monsoon, and European-Mediterranean regions that occurred within decades. Together with the demonstration of bipolar synchrony in atmospheric response, this provides independent evidence of synchronous high-latitude–to-tropical coupling of climate changes during these abrupt warmings. Our results provide a globally coherent framework with which to validate model simulations of abrupt climate change and to constrain ice-core chronologies.

Item Type: Article
Uncontrolled Keywords: 2020arep; IA76
Subjects: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions: 01 - Climate Change and Earth-Ocean Atmosphere Systems
08 - Green Open Access
Journal or Publication Title: Science
Volume: 369
Page Range: pp. 963-969
Identification Number: https://doi.org/10.1126/science.aay5538
Depositing User: Sarah Humbert
Date Deposited: 28 Aug 2020 17:28
Last Modified: 28 Aug 2020 17:28
URI: http://eprints.esc.cam.ac.uk/id/eprint/4868

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