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  A global environmental crisis 42,000 years ago

Cooper, A., Turney, C. S. M., Palmer, J., Hogg, A., McGlone, M., Wilmshurst, J., Lorrey, A. M., Heaton, T. J., Russell, J. M., McCracken, K., Anet, J. G., Rozanov, E., Friedel, M., Suter, I., Peter, T., Muscheler, R., Adolphi, F., Dosseto, A., Faith, J. T., Fenwick, P., Fogwill, C. J., Hughen, K., Lipson, M., Liu, J., Nowaczyk, N., Rainsley, E., Bronk Ramsey, C., Sebastianelli, P., Souilmi, Y., Stevenson, J., Thomas, Z., Tobler, R., Zech, R. (2021): A global environmental crisis 42,000 years ago. - Science, 371, 6531, 811-818.
https://doi.org/10.1126/science.abb8677

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5005805 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5005805_2
Genre: Journal Article

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 Creators:
Cooper, Alan1, Author
Turney, Chris S. M.1, Author
Palmer, Jonathan1, Author
Hogg, Alan1, Author
McGlone, Matt1, Author
Wilmshurst, Janet1, Author
Lorrey, Andrew M.1, Author
Heaton, Timothy J.1, Author
Russell, James M.1, Author
McCracken, Ken1, Author
Anet, Julien G.1, Author
Rozanov, Eugene1, Author
Friedel, Marina1, Author
Suter, Ivo1, Author
Peter, Thomas1, Author
Muscheler, Raimund1, Author
Adolphi, Florian1, Author
Dosseto, Anthony1, Author
Faith, J. Tyler1, Author
Fenwick, Pavla1, Author
Fogwill, Christopher J.1, AuthorHughen, Konrad1, AuthorLipson, Mathew1, AuthorLiu, Jiabo1, AuthorNowaczyk, N.2, Author              Rainsley, Eleanor1, AuthorBronk Ramsey, Christopher1, AuthorSebastianelli, Paolo1, AuthorSouilmi, Yassine1, AuthorStevenson, Janelle1, AuthorThomas, Zoë1, AuthorTobler, Raymond1, AuthorZech, Roland1, Author more..
Affiliations:
1External Organizations, ou_persistent22              
24.3 Climate Dynamics and Landscape Evolution, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146046              

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 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.

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 Dates: 2021-02-182021
 Publication Status: Finally published
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1126/science.abb8677
GFZPOF: p4 T2 Ocean and Cryosphere
GFZPOFWEITERE: p4 T5 Future Landscapes
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Title: Science
Source Genre: Journal, SCI, Scopus
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Pages: - Volume / Issue: 371 (6531) Sequence Number: - Start / End Page: 811 - 818 Identifier: CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals442
Publisher: American Association for the Advancement of Science (AAAS)