Rapid increase in cosmogenic 14C in AD 775 measured in New Zealand kauri trees indicates short-lived increase in 14C production spanning both hemispheres

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D. Güttler, F. Adolphi, J. Beer, N. Bleicher, G. Boswijk, M. Christl, A. Hogg, J. Palmer, C. Vockenhuber, L. Wacker, J. Wunder

Earth and Planetary Science Letters
Volume 411, 1 February 2015, Pages 290–297

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Here we present the first annually resolved Southern Hemisphere (SH) 14C record spanning the interval AD 760–787, using New Zealand kauri (Agathis australis ) chronology wood. An almost identical distinct increase compared to Northern Hemisphere data was observed, suggesting a cosmic event with globally uniform impact as a potential cause for the increase.

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