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

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


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.