Validating putatively cross-dated Callitris tree-ring chronologies using bomb-pulse radiocarbon analysis

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dc.contributor.authorPearson, Sen_AU
dc.contributor.authorHua, Qen_AU
dc.contributor.authorAllen, KJen_AU
dc.contributor.authorBowman, DMJSen_AU
dc.date.accessioned2011-10-11T04:12:13Zen_AU
dc.date.available2011-10-11T04:12:13Zen_AU
dc.date.issued2011-02-10en_AU
dc.date.statistics2011-10-11en_AU
dc.description.abstractNuclear weapons testing during the 1950s generated an atmospheric pulse of the carbon isotope, (14)C. Worldwide, trees growing during that period and in subsequent decades assimilated (14)C-enriched CO(2), leaving a distinct isotopic signature that can be used to precisely date tree rings. Thirty single-ring samples were extracted for AMS (14)C analysis from cores taken from living trees of five different Callitris species [C. endlicheri (Parl.) F. M. Bailey, C. glaucophylla Joy Thomps. & L.A.S. Johnson, C. intratropica Benth., C. preissii Miq., and C. rhomboidea R.Br. ex Rich. & A. Rich] at 13 sites. The ages of individual tree rings were determined by both (14)C bomb-pulse dating and cross-dating (based on 20-30 cores from the same site) in order to (1) provide independent verification of tree-ring dates, (2) detect false or missing rings from sites with otherwise good chronologies, and (3) test whether growth rings were annual for cores from sites where cross-dating was not possible. Our approach confirmed dates on chronologies from monsoon tropical sites, provided checked chronologies in subtropical and temperate sites, and improved dating control on arid-zone ring counts. It was found that Callitris are more likely to form regular annual rings when growing in seasonally dry environments than in more arid sites with highly variable precipitation patterns. © 2011, CSIRO Publishingen_AU
dc.identifier.citationPearson, S., Hua, Q.A., Allen, K., & Bowman, D.M.J.S. (2011). Validating putatively cross-dated Callitris tree-ring chronologies using bomb-pulse radiocarbon analysis, Australian Journal of Botany, 59(1); 7-17. doi:10.1071/BT10164en_AU
dc.identifier.govdoc3685en_AU
dc.identifier.issn0067-1924en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleAustralian Journal of Botanyen_AU
dc.identifier.pagination7-17en_AU
dc.identifier.urihttp://dx.doi.org/10.1071/BT10164en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3815en_AU
dc.identifier.volume59en_AU
dc.language.isoenen_AU
dc.publisherCSIRO Publishingen_AU
dc.subjectTree ringsen_AU
dc.subjectCarbon 14en_AU
dc.subjectCarbon isotopesen_AU
dc.subjectNew South Walesen_AU
dc.subjectWestern Australiaen_AU
dc.subjectAge estimationen_AU
dc.titleValidating putatively cross-dated Callitris tree-ring chronologies using bomb-pulse radiocarbon analysisen_AU
dc.typeJournal Articleen_AU
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