Atmospheric 14C variations derived from tree rings during the early Younger Dryas

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dc.contributor.authorHua, Qen_AU
dc.contributor.authorBarbetti, Men_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorKaiser, KFen_AU
dc.contributor.authorFriedrich, Men_AU
dc.contributor.authorKromer, Ben_AU
dc.contributor.authorLevchenko, VAen_AU
dc.contributor.authorZoppi, Uen_AU
dc.contributor.authorSmith, AMen_AU
dc.contributor.authorBertuch, Fen_AU
dc.date.accessioned2010-04-06T02:12:10Zen_AU
dc.date.accessioned2010-04-30T05:09:11Zen_AU
dc.date.available2010-04-06T02:12:10Zen_AU
dc.date.available2010-04-30T05:09:11Zen_AU
dc.date.issued2009-12en_AU
dc.date.statistics2009-12en_AU
dc.description.abstractAtmospheric radiocarbon variations over the Younger Dryas interval, from ~13,000 to 11,600 cal yr BP, are of immense scientific interest because they reveal crucial information about the linkages between climate, ocean circulation and the carbon cycle. However, no direct and reliable atmospheric 14C records based on tree rings for the entire Younger Dryas have been available. In this paper, we present (1) high-precision 14C measurements on the extension of absolute tree-ring chronology from 12,400 to 12,560 cal yr BP and (2) high-precision, high-resolution atmospheric 14C record derived from a 617-yr-long tree-ring chronology of Huon pine from Tasmania, Australia, spanning the early Younger Dryas. The new tree-ring 14C records bridge the current gap in European tree-ring radiocarbon chronologies during the early Younger Dryas, linking the floating Lateglacial Pine record to the absolute tree-ring timescale. A continuous and reliable atmospheric 14C record for the past 14,000 cal yr BP including the Younger Dryas is now available. The new records indicate that the abrupt rise in atmospheric Δ14C associated with the Younger Dryas onset occurs at ~12,760 cal yr BP, ~240 yrs later than that recorded in Cariaco varves, with a smaller magnitude of ~40‰ followed by several centennial Δ14C variations of 20–25‰. Comparing the tree-ring Δ14C to marine-derived Δ14C and modelled Δ14C based on ice-core 10Be fluxes, we conclude that changes in ocean circulation were mainly responsible for the Younger Dryas onset, while a combination of changes in ocean circulation and 14C production rate were responsible for atmospheric Δ14C variations for the remainder of the Younger Dryas. © 2009, Elsevier Ltd.en_AU
dc.identifier.citationHua, Q., Barbetti, M., Fink, D., Kaiser, K. F., Friedrich, M., Kromer, B., Levchenko, V. A., Zoppi, U., Smith, A. M., & Bertuch, F. (2009). Atmospheric 14C variations derived from tree rings during the early Younger Dryas. Quaternary Science Reviews, 28(25-26), 2982-2990. doi:10.1016/j.quascirev.2009.08.013en_AU
dc.identifier.govdoc1592en_AU
dc.identifier.issn0277-3791en_AU
dc.identifier.issue25-26en_AU
dc.identifier.journaltitleQuaternary Science Reviewsen_AU
dc.identifier.pagination2982-2990en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.quascirev.2009.08.013en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3041en_AU
dc.identifier.volume28en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectTree ringsen_AU
dc.subjectCarbon 14en_AU
dc.subjectTasmaniaen_AU
dc.subjectIsotope datingen_AU
dc.subjectWater currentsen_AU
dc.subjectAtmospheric circulationen_AU
dc.titleAtmospheric 14C variations derived from tree rings during the early Younger Dryasen_AU
dc.typeJournal Articleen_AU
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