Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE

Büntgen U, Wacker L, Galván JD, Arnold S, Arseneault D, Baillie M, Beer J, Bernabei M, Bleicher N, Boswijk G, Young GHF, et al.
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Büntgen, U., Wacker, L., Galván, J. D., Arnold, S., Arseneault, D., Baillie, M., Beer, J., Bernabei, M., Bleicher, N., Boswijk, G., & Young, G. H. F. (2018). Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE. Nature Communications, 9(1), 3605 (7 pp.). https://doi.org/10.1038/s41467-018-06036-0