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A global environmental crisis 42,000 years ago

Cooper, Alan (author)
BlueSky Genetics,South Australian Museum
Turney, Chris S.M. (author)
University of New South Wales
Palmer, Jonathan (author)
University of New South Wales
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Hogg, Alan (author)
University of Waikato
McGlone, Matt (author)
Landcare Research
Wilmshurst, Janet (author)
Landcare Research,University of Auckland
Lorrey, Andrew M. (author)
National Institute of Water and Atmospheric Research, New Zealand
Heaton, Timothy J. (author)
University of Sheffield
Russell, James M. (author)
Brown University
McCracken, Ken (author)
University of New South Wales
Anet, Julien G. (author)
Zurich University of Applied Sciences (ZHAW)
Rozanov, Eugene (author)
ETH Zürich,Physikalisch-Meteorologisches Observatorium Davos and World Radiation Center (PMOD/WRC),Saint Petersburg State University
Friedel, Marina (author)
ETH Zürich
Suter, Ivo (author)
Swiss Federal Laboratories for Materials Science and Technology
Peter, Thomas (author)
ETH Zürich
Muscheler, Raimund (author)
Lund University,Lunds universitet,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,MERGE: ModElling the Regional and Global Earth system,Kvartärgeologi,Geologiska institutionen,Centre for Environmental and Climate Science (CEC),Faculty of Science,Quaternary Sciences,Department of Geology
Adolphi, Florian (author)
Alfred-Wegener Institute, Helmholtz Center for Polar and Marine Research, Bremerhaven
Dosseto, Anthony (author)
University of Wollongong
Tyler Faith, J. (author)
Natural History Museum of Utah,University of Utah
Fenwick, Pavla (author)
Gondwana Tree-Ring Laboratory
Fogwill, Christopher J. (author)
Keele University
Hughen, Konrad (author)
Woods Hole Oceanographic Institution
Lipson, Mathew (author)
University of New South Wales
Liu, Jiabo (author)
Southern University of Science and Technology
Nowaczyk, Norbert (author)
GFZ German Research Centre for Geosciences
Rainsley, Eleanor (author)
Keele University
Ramsey, Christopher Bronk (author)
University of Oxford
Sebastianelli, Paolo (author)
National University of Cordoba, Argentina
Souilmi, Yassine (author)
University of Adelaide
Stevenson, Janelle (author)
Australian National University
Thomas, Zoë (author)
University of New South Wales
Tobler, Raymond (author)
University of Adelaide
Zech, Roland (author)
Friedrich Schiller University Jena
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 (creator_code:org_t)
American Association for the Advancement of Science (AAAS), 2021
2021
English 8 s.
In: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 371:6531, s. 811-818
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • 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.

Subject headings

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Geology (hsv//eng)

Publication and Content Type

art (subject category)
ref (subject category)

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