Reconstructing late pleistocene atmospheric radiocarbon using subfossil New Zealand Kauri (Agathis australis)

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dc.contributor.authorO'Brien, PPen_AU
dc.contributor.authorTurney, CSMen_AU
dc.contributor.authorPalmer, JGen_AU
dc.contributor.authorFenwick, Pen_AU
dc.contributor.authorHogg, AGen_AU
dc.contributor.authorLorrey, AMen_AU
dc.contributor.authorHua, Qen_AU
dc.date.accessioned2023-01-19T22:56:32Zen_AU
dc.date.available2023-01-19T22:56:32Zen_AU
dc.date.issued2021-11-17en_AU
dc.date.statistics2022-05-27en_AU
dc.description.abstractSubfossil New Zealand kauri (Agathis australis) buried in bogs across Northland, New Zealand, provide considerable potential for a continuous high-precision radiocarbon calibration curve that extends across the full range of radiocarbon dating. Kauri currently is a significant contributor to our understanding of calibration in this Southern region. The preserved samples also offer a unique opportunity to reconstruct climate events on multi-millennial timescales with annual resolution and carbon concentration. Here we investigate a key site called Waipu, where 40 subfossil trees have been crossdated to form 5 floating chronologies. These series cover collectively 6000 years and preliminary radiocarbon dating suggests a range of ages from 22,000 to 49,000 years BP. Further radiocarbon dating and crossdating of other kauri tree-ring series using the new RingdateR package and visual inspection has identified other trees that may cross-date. This suggests it may be possible to link the floating Waipu series, forming a continuous chronology.If successful this would form the one of the longest subfossil kauri chronologies, with the help of radiocarbon dating. The Waipu chronology would form a world-class palaeo-archive for the Southern Hemisphere and provide a valuable contribution to future iterations of the international calibration curves. © The Authorsen_AU
dc.identifier.citationO'Brien, P. P. Turney, C., Palmer, J., Fenwick, P., Hogg, A., Lorrey, A., & Hua, Q. (2021). Reconstructing late pleistocene atmospheric radiocarbon using subfossil New Zealand Kauri (Agathis australis). Paper presented to the 15th International Conference on Accelerator Mass Spectrometry. ANSTO Sydney, Australia. November 15th – 19th, 2021, (pp. 44). Retrieved from: https://ams15sydney.com/wp-content/uploads/2021/11/AMS-15-Full-Program-and-Abstract-Book-R-1.pdfen_AU
dc.identifier.conferenceenddate19 November 2021en_AU
dc.identifier.conferencename15th International Conference on Accelerator Mass Spectrometryen_AU
dc.identifier.conferenceplaceSydney, Australiaen_AU
dc.identifier.conferencestartdate15 November 2021en_AU
dc.identifier.pagination44en_AU
dc.identifier.urihttps://ams15sydney.com/wp-content/uploads/2021/11/AMS-15-Full-Program-and-Abstract-Book-R-1.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/14428en_AU
dc.language.isoenen_AU
dc.publisherAustralian Nuclear Science and Technology Organisationen_AU
dc.subjectPleistocene epochen_AU
dc.subjectAtmospheresen_AU
dc.subjectCarbon 14en_AU
dc.subjectFossilsen_AU
dc.subjectNew Zealanden_AU
dc.subjectClimatesen_AU
dc.subjectTree ringsen_AU
dc.subjectSouthern Hemisphereen_AU
dc.titleReconstructing late pleistocene atmospheric radiocarbon using subfossil New Zealand Kauri (Agathis australis)en_AU
dc.typeConference Abstracten_AU
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