Changes in El Niño – Southern Oscillation (ENSO) conditions during the Greenland Stadial 1 (GS-1) chronozone revealed by New Zealand tree-rings

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Changes in El Niño – Southern Oscillation (ENSO) conditions during the Greenland Stadial 1 (GS-1) chronozone revealed by New Zealand tree-rings

Palmer, Jonathan G. (author): University of New South Wales

Turney, Chris S M (author): University of New South Wales

Cook, Edward R. (author): Columbia University

Fenwick, Pavla (author): University of Auckland

Thomas, Zoë (author): University of New South Wales

Helle, Gerhard (author): GFZ German Research Centre for Geosciences

Jones, Richard (author): University of Exeter

Clement, Amy (author): University of Miami

Hogg, Alan (author): University of Waikato

Southon, John (author): University of California, Irvine

Bronk Ramsey, Christopher (author): University of Oxford

Staff, Richard (author): University of Oxford

Muscheler, Raimund (author): Lund University,Lunds universitet,Kvartärgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Quaternary Sciences,Department of Geology,Faculty of Science

Corrège, Thierry (author): University of Bordeaux

Hua, Quan (author): Australian Nuclear Science and Technology Organisation

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(creator_code:org_t)

Elsevier BV, 2016
2016
English 17 s.
In: Quaternary Science Reviews. - : Elsevier BV. - 0277-3791. ; 153, s. 139-155

Related links:: http://dx.doi.org/10...; show more...; https://ora.ox.ac.uk...; https://lup.lub.lu.s...; https://doi.org/10.1...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

The warming trend at the end of the last glacial was disrupted by rapid cooling clearly identified in Greenland (Greenland Stadial 1 or GS-1) and Europe (Younger Dryas Stadial or YD). This reversal to glacial-like conditions is one of the best known examples of abrupt change but the exact timing and global spatial extent remain uncertain. Whilst the wider Atlantic region has a network of high-resolution proxy records spanning GS-1, the Pacific Ocean suffers from a scarcity of sub-decadally resolved sequences. Here we report the results from an investigation into a tree-ring chronology from northern New Zealand aimed at addressing the paucity of data. The conifer tree species kauri (Agathis australis) is known from contemporary studies to be sensitive to regional climate changes. An analysis of a ‘historic’ 452-year kauri chronology confirms a tropical-Pacific teleconnection via the El Niño – Southern Oscillation (ENSO). We then focus our study on a 1010-year sub-fossil kauri chronology that has been precisely dated by comprehensive radiocarbon dating and contains a striking ring-width downturn between ∼12,500 and 12,380 cal BP within GS-1. Wavelet analysis shows a marked increase in ENSO-like periodicities occurring after the downturn event. Comparison to low- and mid-latitude Pacific records suggests a coherency with ENSO and Southern Hemisphere atmospheric circulation change during this period. The driver(s) for this climate event remain unclear but may be related to solar changes that subsequently led to establishment and/or increased expression of ENSO across the mid-latitudes of the Pacific, seemingly independent of the Atlantic and polar regions.

Subject headings

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

Keyword

Abrupt climate change
Antarctic Cold Reversal (ACR)
Bipolar seesaw
Dendrochronology
Kauri (Agathis australis)
Last Termination
Younger Dryas (YD)

Publication and Content Type

art (subject category)
ref (subject category)

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By the author/editor: Palmer, Jonathan ...; Turney, Chris S ...; Cook, Edward R.; Fenwick, Pavla; Thomas, Zoë; Helle, Gerhard; show more...; Jones, Richard; Clement, Amy; Hogg, Alan; Southon, John; Bronk Ramsey, Ch ...; Staff, Richard; Muscheler, Raimu ...; Corrège, Thierry; Hua, Quan; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Geology

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Climate Research

Articles in the publication: Quaternary Scien ...

By the university: Lund University

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