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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dc.contributor.authorPalmer, JGen_AU
dc.contributor.authorTurney, CSMen_AU
dc.contributor.authorCook, ERen_AU
dc.contributor.authorFenwick, Pen_AU
dc.contributor.authorThomas, ZAen_AU
dc.contributor.authorHelle, Gen_AU
dc.contributor.authorJones, RTen_AU
dc.contributor.authorClement, Aen_AU
dc.contributor.authorHogg, AGen_AU
dc.contributor.authorSouthon, Jen_AU
dc.contributor.authorBronk Ramsey, Cen_AU
dc.contributor.authorStaff, Ren_AU
dc.contributor.authorMuscheler, Ren_AU
dc.contributor.authorCorrège, Ten_AU
dc.contributor.authorHua, Qen_AU
dc.date.accessioned2017-04-26T01:37:59Zen_AU
dc.date.available2017-04-26T01:37:59Zen_AU
dc.date.issued2016-12-01en_AU
dc.date.statistics2017-04-26en_AU
dc.description.abstractThe 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. © 2016, Elsevier Ltd.en_AU
dc.identifier.citationPalmer, J. G., Turney, C. S. M., Cook, E. R., Fenwick, P., Thomas, Z., Helle, G., Jones, R., Clement, A., Hogg, A., Southon, J., Bronk Ramsey, C., Staff, R., Muscheler, R., Corrège, & T., Hua, Q. (2016). Changes in El Niño – Southern Oscillation (ENSO) conditions during the Greenland Stadial 1 (GS-1) chronozone revealed by New Zealand tree-rings. Quaternary Science Reviews, 153, 139-155. doi:10.1016/j.quascirev.2016.10.003en_AU
dc.identifier.govdoc7714en_AU
dc.identifier.issn0277-3791en_AU
dc.identifier.journaltitleQuaternary Science Reviewsen_AU
dc.identifier.pagination139-155en_AU
dc.identifier.urihttps://doi.org/10.1016/j.quascirev.2016.10.003en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/8625en_AU
dc.identifier.volume153en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectGreenlanden_AU
dc.subjectOscillationsen_AU
dc.subjectNew Zealanden_AU
dc.subjectTree ringsen_AU
dc.subjectCoolingen_AU
dc.subjectAtlantic Oceanen_AU
dc.titleChanges in El Niño - Southern Oscillation (ENSO) conditions during the Greenland Stadial 1 (GS-1) chronozone revealed by New Zealand tree-ringsen_AU
dc.typeJournal Articleen_AU
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