High-precision dating and correlation of ice, marine and terrestrial sequences spanning Heinrich Event 3: Testing mechanisms of interhemispheric change using New Zealand ancient kauri (Agathis australis)

Turney, CSM; Palmer, J; Bronk Ramsey, C; Adolphi, F; Muscheler, R; Hughen, KA; Staff, RA; Jones, RT; Thomas, ZA; Fogwill, CJ; Hogg, A

High-precision dating and correlation of ice, marine and terrestrial sequences spanning Heinrich Event 3: Testing mechanisms of interhemispheric change using New Zealand ancient kauri (Agathis australis)

Turney, CSM Palmer, J Bronk Ramsey, C Adolphi, F Muscheler, R Hughen, KA Staff, RA Jones, RT Thomas, ZA Fogwill, CJ Hogg, A

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Quaternary Science Reviews, 2016, 137, pp. 126-134
Issue Date:: 2016-04-01

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Field	Value	Language
dc.contributor.author	Turney, CSM
dc.contributor.author	Palmer, J
dc.contributor.author	Bronk Ramsey, C
dc.contributor.author	Adolphi, F
dc.contributor.author	Muscheler, R
dc.contributor.author	Hughen, KA
dc.contributor.author	Staff, RA
dc.contributor.author	Jones, RT
dc.contributor.author	Thomas, ZA
dc.contributor.author	Fogwill, CJ
dc.contributor.author	Hogg, A
dc.date.accessioned	2022-08-16T07:04:15Z
dc.date.available	2022-08-16T07:04:15Z
dc.date.issued	2016-04-01
dc.identifier.citation	Quaternary Science Reviews, 2016, 137, pp. 126-134
dc.identifier.issn	0277-3791
dc.identifier.uri	http://hdl.handle.net/10453/160367
dc.description.abstract	Robustly testing hypotheses of geographic synchroneity of abrupt and extreme change during the late Pleistocene (60,000 to 11,650 years ago) requires a level of chronological precision often lacking in ice, marine and terrestrial sequences. Here we report a bidecadally-resolved New Zealand kauri (Agathis australis) tree-ring sequence spanning two millennia that preserves a record of atmospheric radiocarbon (14C) during ice-rafted debris event Heinrich Event 3 (HE3) in the North Atlantic and Antarctic Isotope Maximum 4 (AIM4) in the Southern Hemisphere. Using 14C in the marine Cariaco Basin and 10Be preserved in Greenland ice, the kauri 14C sequence allows us to precisely align sequences across this period. We observe no significant difference between atmospheric and marine 14C records during HE3, suggesting no stratification of surface waters and collapse in Atlantic Meridional Overturning Circulation (AMOC). Instead our results support recent evidence for a weakened AMOC across at least two millennia of the glacial period. Our work adds to a growing body of literature confirming that Heinrich events are not the cause of stadial cooling and suggests changes in the AMOC were not the primary driver of antiphase temperature trends between the hemispheres. Decadally-resolved 14C in ancient kauri offers a powerful new (and complementary) approach to polar ice core CH4 alignment for testing hypotheses of abrupt and extreme climate change.
dc.language	English
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation	http://purl.org/au-research/grants/arc/FL100100195
dc.relation.ispartof	Quaternary Science Reviews
dc.relation.isbasedon	10.1016/j.quascirev.2016.02.005
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	04 Earth Sciences, 21 History and Archaeology
dc.subject.classification	Paleontology
dc.title	High-precision dating and correlation of ice, marine and terrestrial sequences spanning Heinrich Event 3: Testing mechanisms of interhemispheric change using New Zealand ancient kauri (Agathis australis)
dc.type	Journal Article
utslib.citation.volume	137
utslib.for	04 Earth Sciences
utslib.for	21 History and Archaeology
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/DVC (Research)
utslib.copyright.status	closed_access	*
dc.date.updated	2022-08-16T07:04:14Z
pubs.publication-status	Published
pubs.volume	137

Abstract:

Robustly testing hypotheses of geographic synchroneity of abrupt and extreme change during the late Pleistocene (60,000 to 11,650 years ago) requires a level of chronological precision often lacking in ice, marine and terrestrial sequences. Here we report a bidecadally-resolved New Zealand kauri (Agathis australis) tree-ring sequence spanning two millennia that preserves a record of atmospheric radiocarbon (14C) during ice-rafted debris event Heinrich Event 3 (HE3) in the North Atlantic and Antarctic Isotope Maximum 4 (AIM4) in the Southern Hemisphere. Using 14C in the marine Cariaco Basin and 10Be preserved in Greenland ice, the kauri 14C sequence allows us to precisely align sequences across this period. We observe no significant difference between atmospheric and marine 14C records during HE3, suggesting no stratification of surface waters and collapse in Atlantic Meridional Overturning Circulation (AMOC). Instead our results support recent evidence for a weakened AMOC across at least two millennia of the glacial period. Our work adds to a growing body of literature confirming that Heinrich events are not the cause of stadial cooling and suggests changes in the AMOC were not the primary driver of antiphase temperature trends between the hemispheres. Decadally-resolved 14C in ancient kauri offers a powerful new (and complementary) approach to polar ice core CH4 alignment for testing hypotheses of abrupt and extreme climate change.

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http://hdl.handle.net/10453/160367