Kauri Tree-Ring Stable Isotopes Reveal a Centennial Climate Downturn Following the Antarctic Cold Reversal in New Zealand

Pauly, M; Turney, CSM; Palmer, JG; Büntgen, U; Brauer, A; Helle, G

Kauri Tree-Ring Stable Isotopes Reveal a Centennial Climate Downturn Following the Antarctic Cold Reversal in New Zealand

Pauly, M Turney, CSM Palmer, JG Büntgen, U Brauer, A Helle, G

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Publisher:: AMER GEOPHYSICAL UNION
Publication Type:: Journal Article
Citation:: Geophysical Research Letters, 2021, 48, (2)
Issue Date:: 2021-01-28

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Field	Value	Language
dc.contributor.author	Pauly, M
dc.contributor.author	Turney, CSM
dc.contributor.author	Palmer, JG
dc.contributor.author	Büntgen, U
dc.contributor.author	Brauer, A
dc.contributor.author	Helle, G
dc.date.accessioned	2021-12-24T00:07:26Z
dc.date.available	2021-12-24T00:07:26Z
dc.date.issued	2021-01-28
dc.identifier.citation	Geophysical Research Letters, 2021, 48, (2)
dc.identifier.issn	0094-8276
dc.identifier.issn	1944-8007
dc.identifier.uri	http://hdl.handle.net/10453/152510
dc.description.abstract	The dynamics of the Late Glacial have been demonstrated by numerous records from the Northern Hemisphere and far fewer from the Southern Hemisphere (SH). SH paleoclimate records reveal a general warming trend, interrupted by a deglaciation pause Antarctic Cold Reversal (ACR; ∼14,700–13,000 cal BP). Here, we present decadal tree-ring stable isotope chronologies (δ18O, δ13C) from New Zealand (NZ) subfossil kauri trees (n = 6) covering the post-ACR millennium from 13,020 to 11,850 cal BP. We find a distinct, simultaneous downturn (∼12,625–12,375 cal BP) in all tree-ring proxies paralleling regional tree growth declines, suggesting a widespread climate deterioration. This downturn was characterized by sustained high precipitation, low temperatures, and high relative humidity in NZ with incoming weather fronts from the South Ocean. Despite these promising results, questions remain about what drove the Kauri Downturn and how the hydroclimatic conditions were altered during this time period.
dc.language	English
dc.publisher	AMER GEOPHYSICAL UNION
dc.relation.ispartof	Geophysical Research Letters
dc.relation.isbasedon	10.1029/2020GL090299
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	Meteorology & Atmospheric Sciences
dc.title	Kauri Tree-Ring Stable Isotopes Reveal a Centennial Climate Downturn Following the Antarctic Cold Reversal in New Zealand
dc.type	Journal Article
utslib.citation.volume	48
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/DVC (Research)
utslib.copyright.status	open_access	*
dc.date.updated	2021-12-24T00:07:25Z
pubs.issue	2
pubs.publication-status	Published
pubs.volume	48
utslib.citation.issue	2

Abstract:

The dynamics of the Late Glacial have been demonstrated by numerous records from the Northern Hemisphere and far fewer from the Southern Hemisphere (SH). SH paleoclimate records reveal a general warming trend, interrupted by a deglaciation pause Antarctic Cold Reversal (ACR; ∼14,700–13,000 cal BP). Here, we present decadal tree-ring stable isotope chronologies (δ18O, δ13C) from New Zealand (NZ) subfossil kauri trees (n = 6) covering the post-ACR millennium from 13,020 to 11,850 cal BP. We find a distinct, simultaneous downturn (∼12,625–12,375 cal BP) in all tree-ring proxies paralleling regional tree growth declines, suggesting a widespread climate deterioration. This downturn was characterized by sustained high precipitation, low temperatures, and high relative humidity in NZ with incoming weather fronts from the South Ocean. Despite these promising results, questions remain about what drove the Kauri Downturn and how the hydroclimatic conditions were altered during this time period.

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http://hdl.handle.net/10453/152510