A global environmental crisis 42,000 years ago.

Cooper, A; Turney, CSM; Palmer, J; Hogg, A; McGlone, M; Wilmshurst, J; Lorrey, AM; Heaton, TJ; Russell, JM; McCracken, K; Anet, JG; Rozanov, E; Friedel, M; Suter, I; Peter, T; Muscheler, R; Adolphi, F; Dosseto, A; Faith, JT; Fenwick, P; Fogwill, CJ; 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

A global environmental crisis 42,000 years ago.

Cooper, A Turney, CSM Palmer, J Hogg, A McGlone, M Wilmshurst, J Lorrey, AM Heaton, TJ Russell, JM McCracken, K Anet, JG Rozanov, E Friedel, M Suter, I Peter, T Muscheler, R Adolphi, F Dosseto, A Faith, JT Fenwick, P Fogwill, CJ 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

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Publisher:: AMER ASSOC ADVANCEMENT SCIENCE
Publication Type:: Journal Article
Citation:: Science (New York, N.Y.), 2021, 371, (6531), pp. 811-818
Issue Date:: 2021-02

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Field	Value	Language
dc.contributor.author	Cooper, A
dc.contributor.author	Turney, CSM
dc.contributor.author	Palmer, J
dc.contributor.author	Hogg, A
dc.contributor.author	McGlone, M
dc.contributor.author	Wilmshurst, J
dc.contributor.author	Lorrey, AM
dc.contributor.author	Heaton, TJ
dc.contributor.author	Russell, JM
dc.contributor.author	McCracken, K
dc.contributor.author	Anet, JG
dc.contributor.author	Rozanov, E
dc.contributor.author	Friedel, M
dc.contributor.author	Suter, I
dc.contributor.author	Peter, T
dc.contributor.author	Muscheler, R
dc.contributor.author	Adolphi, F
dc.contributor.author	Dosseto, A
dc.contributor.author	Faith, JT
dc.contributor.author	Fenwick, P
dc.contributor.author	Fogwill, CJ
dc.contributor.author	Hughen, K
dc.contributor.author	Lipson, M
dc.contributor.author	Liu, J
dc.contributor.author	Nowaczyk, N
dc.contributor.author	Rainsley, E
dc.contributor.author	Bronk Ramsey, C
dc.contributor.author	Sebastianelli, P
dc.contributor.author	Souilmi, Y
dc.contributor.author	Stevenson, J
dc.contributor.author	Thomas, Z
dc.contributor.author	Tobler, R
dc.contributor.author	Zech, R
dc.date.accessioned	2021-12-23T21:41:52Z
dc.date.available	2020-12-14
dc.date.available	2021-12-23T21:41:52Z
dc.date.issued	2021-02
dc.identifier.citation	Science (New York, N.Y.), 2021, 371, (6531), pp. 811-818
dc.identifier.issn	0036-8075
dc.identifier.issn	1095-9203
dc.identifier.uri	http://hdl.handle.net/10453/152502
dc.description.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 (<i>Agathis australis</i>) 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.
dc.format	Print
dc.language	eng
dc.publisher	AMER ASSOC ADVANCEMENT SCIENCE
dc.relation	http://purl.org/au-research/grants/arc/DP170104665
dc.relation	http://purl.org/au-research/grants/arc/FL100100195
dc.relation.ispartof	Science (New York, N.Y.)
dc.relation.isbasedon	10.1126/science.abb8677
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	General Science & Technology
dc.title	A global environmental crisis 42,000 years ago.
dc.type	Journal Article
utslib.citation.volume	371
utslib.location.activity	United States
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/DVC (Research)
utslib.copyright.status	closed_access	*
dc.date.updated	2021-12-23T21:41:51Z
pubs.issue	6531
pubs.publication-status	Published
pubs.volume	371
utslib.citation.issue	6531

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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http://hdl.handle.net/10453/152502