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

BÜNTGEN, Ulf, WACKER, L., GALVAN, D., ARNOLD, S., ARSENEAULT, D., BAILLIE, M., BEER, J., BERNABEI, M., BLEICHER, N., BOSWIJK, G., BRAUNING, A., CARRER, M., LJUNGQVIST, F. C., CHERUBINI, P., CHRISTL, M., CHRISTIE, D. A., CLARK, Peter W., COOK, E.R., D'ARRIGO, R., DAVI, N., EGGERTSSON, O., ESPER, J., FOWLER, A. M., GEDALOF, Z., GENNARETTI, F., GRIESSINGER, J., GRISSINO-MAYER, H., GRUDD, H., GUNNARSON, B., HANTEMIROV, R., HERZIG, F., HESSL, A., HEUSSNER, K. U., JULL, A. J. T., KUKARSKIH, V., KIRDYANOV, A. V., KOLÁŘ, Tomáš, KRUSIC, P. J., KYNCL, Tomáš, LARA, A., LEQUESNE, C., LINDERHOLM, H. W., LOADER, N. J., LUCKMAN, B., MIYAKE, F., MYGLAN, V. S., NICOLUSSI, K., OPPENHEIMER, C., PALMER, J., PANYUSHKINA, I., PEDERSON, N., RYBNÍČEK, Michal, SCHWEINGRUBER, F. H., SEIM, A., SIGL, M., CHURAKOVA (SIDOROVA), O., SPEER, J. H., SYNAL, H.-A., TEGEL, W., TREYDTE, K., VILLALBA, R., WILES, G., WILSON, R., WINSHIP, Lawrence J., WUNDER, J., YANG, B., YOUNG, G. H. F. Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE. Nature Communications. 2018, 9(sep), 3605. E-ISSN 2041-1723. Available: doi: 10.1038/s41467-018-06036-0