Radiocarbon production events and their potential relationship with the Schwabe cycle

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dc.contributor.authorScifo, Aen_AU
dc.contributor.authorKuitems, Men_AU
dc.contributor.authorNeocleous, Aen_AU
dc.contributor.authorPope, BJSen_AU
dc.contributor.authorMiles, Den_AU
dc.contributor.authorJansma, Een_AU
dc.contributor.authorDoeve, Pen_AU
dc.contributor.authorSmith, AMen_AU
dc.contributor.authorMiyake, Fen_AU
dc.contributor.authorDee, MWen_AU
dc.date.accessioned2024-08-21T23:44:09Zen_AU
dc.date.available2024-08-21T23:44:09Zen_AU
dc.date.issued2019-11-19en_AU
dc.date.statistics2024-08-16en_AU
dc.description.abstractExtreme cosmic radiation events occurred in the years 774/5 and 993/4 CE, as revealed by anomalies in the concentration of radiocarbon in known-age tree-rings. Most hypotheses point towards intense solar storms as the cause for these events, although little direct experimental support for this claim has thus far come to light. In this study, we perform very high-precision accelerator mass spectrometry (AMS) measurements on dendrochronological tree-rings spanning the years of the events of interest, as well as the Carrington Event of 1859 CE, which is recognized as an extreme solar storm even though it did not generate an anomalous radiocarbon signature. Our data, comprising 169 new and previously published measurements, appear to delineate the modulation of radiocarbon production due to the Schwabe (11-year) solar cycle. Moreover, they suggest that all three events occurred around the maximum of the solar cycle, adding experimental support for a common solar origin. © The Authors CC BYen_AU
dc.description.sponsorshipThis work was supported by a European Research Council grant (ECHOES, 714679). We would like to acknowledge the contribution to this research of the staff at the Centre for Isotope Research, Groningen, especially A. Aerts-Bijma, M. Bleeker, S. de Bruijn, F. Ghebru, S. Palstra, D. van Zonneveld, B. Verstappen-Dumoulin and P. Wietzes. This work was performed in part under contract with the Jet Propulsion Laboratory (JPL) funded by NASA through the Sagan Fellowship Program executed by the NASA Exoplanet Science Institute.en_AU
dc.format.mediumElectronicen_AU
dc.identifier.articlenumber17056en_AU
dc.identifier.citationScifo, A., Kuitems, M., Neocleous, A., Pope, B. J. S., Miles, D., Jansma, E., Doeve, P., Smith, A. M., Miyake, F., & Dee, M. W. (2019). Radiocarbon production events and their potential relationship with the Schwabe cycle. Scientific Reports, 9(1), 17056. doi:10.1038/s41598-019-53296-xen_AU
dc.identifier.issn2045-2322en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleScientific Reportsen_AU
dc.identifier.urihttp://dx.doi.org/10.1038/s41598-019-53296-xen_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15651en_AU
dc.identifier.volume9en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherSpringer Natureen_AU
dc.subjectAtmospheric chemistryen_AU
dc.subjectCarbon 14en_AU
dc.subjectCosmic radiationen_AU
dc.subjectTree ringsen_AU
dc.subjectAcceleratorsen_AU
dc.subjectMass spectroscopyen_AU
dc.subjectNuclear reactionsen_AU
dc.titleRadiocarbon production events and their potential relationship with the Schwabe cycleen_AU
dc.typeJournal Articleen_AU
dcterms.dateAccepted2019-10-24en_AU
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