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

      Büntgen, U; Wacker, L; Galván, D; Arnold, S; Arseneault, D; Baillie, M; Beer, J; Bernabei, M; Bleicher, N; Boswijk, G; Bräuning, A; Carrer, M; Charpentier, Ljungqvist F; Cherubini, P; Christl, M; Christie, Da; Clark, Pw; Cook, Er; D’Arrigo, R; Davi, N; Eggertsson, O; Esper, J; Fowler, Am; Gedalof, Z; Gennaretti, F; Grießinger, J; Grissino-Mayer, H; Grudd, H; Gunnarson, Be; Hantemirov, R; Herzig, R; Hessl, A; Heussner, K-W; Timothy, Aj; Kukarskih, V; Kirdyanov, A; Kolář, T; Krusic, Pk; Kyncl, T; Carlos, Lequesne L; Lequesne, C; Linderholm, Hw; Loader, Nj; Luckman, B; Miyake, F; Myglan, V; Nicolussi, K; Oppenheimer, C; Palmer, J; Panyushkina, I; Pederson, I; Rybníček, M; Schweingruber, Fh; Seim, A; Sigl, M; Чуракова О.В. (Сидорова О. В.); Speer, Jh; Synal, H-A; Tegel, W; Treydte, K; Villalba, R; Wiles, G; Wilson, R; Winship, Lj; Wunder, J; Yang, B; Young, Gfh (2018)
      Though tree-ring chronologies are annually resolved, their dating has never been independently validated at the global scale. Moreover, it is unknown if atmospheric radiocarbon enrichment events of cosmogenic origin leave ...