Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: A global environmental crisis 42,000 years ago
Authors: Cooper, Alan
Turney, Chris S. M.
Palmer, Jonathan
Hogg, Alan
McGlone, Matt
Wilmshurst, Janet
Lorrey, Andrew M.
Heaton, Timothy J.
Russell, James M.
McCracken, Ken
Anet, Julien
Rozanov, Eugene
Friedel, Marina
Suter, Ivo
Peter, Thomas
Muscheler, Raimund
Adolphi, Florian
Dosseto, Anthony
Faith, Tyler J.
Fenwick, Pavla
Fogwill, Christopher J.
Hughen, Konrad
Lipson, Mathew
Liu, Jiabo
Nowaczyk, Norbert
Rainsley, Eleanor
Ramsey, Christopher Bronk
Sebastianelli, Paolo
Souilmi, Yassine
Stevenson, Janelle
Thomas, Zoë
Tobler, Raymond
Zech, Roland
et. al: No
DOI: 10.1126/science.abb8677
Published in: Science
Volume(Issue): 371
Issue: 6531
Pages: 811
Pages to: 818
Issue Date: Feb-2021
Publisher / Ed. Institution: American Association for the Advancement of Science
ISSN: 0036-8075
1095-9203
Language: English
Subject (DDC): 530: Physics
551: Geology and hydrology
Abstract: Geological archives record multiple reversals of Earth’s magnetic poles, but the global impacts of these events, if any, remain unclear. Uncertain radiocarbon calibration has limited investigation of the potential effects of the last major magnetic inversion, known as the Laschamps Excursion [41 to 42 thousand years ago (ka)]. We use ancient New Zealand kauri trees (Agathis australis) to develop a detailed record of atmospheric radiocarbon levels across the Laschamps Excursion. We precisely characterize the geomagnetic reversal and perform global chemistry-climate modeling and detailed radiocarbon dating of paleoenvironmental records to investigate impacts. We find that geomagnetic field minima ~42 ka, in combination with Grand Solar Minima, caused substantial changes in atmospheric ozone concentration and circulation, driving synchronous global climate shifts that caused major environmental changes, extinction events, and transformations in the archaeological record.
URI: https://digitalcollection.zhaw.ch/handle/11475/21874
Fulltext version: Published version
License (according to publishing contract): Licence according to publishing contract
Departement: School of Engineering
Organisational Unit: Centre for Aviation (ZAV)
Appears in collections:Publikationen School of Engineering

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