Number of the records: 1
Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE
- 1.
SYSNO ASEP 0495446 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE Author(s) Büntgen, Ulf (UEK-B) RID, ORCID, SAI
Wacker, L. (CH)
Galvan, D. (US)
Arnold, S. (CH)
Arseneault, D. (CA)
Baillie, M. (IE)
Beer, J. (CH)
Bernabei, M. (IT)
Bleicher, N. (CH)
Boswijk, G. (NZ)
Brauning, A. (DE)
Carrer, M. (IT)
Ljungqvist, F. C. (SE)
Cherubini, P. (CH)
Christl, M. (CH)
Christie, D. A. (CL)
Clark, Peter W. (US)
Cook, E.R. (US)
D'Arrigo, R. (US)
Davi, N. (US)
Eggertsson, O. (IS)
Esper, J. (DE)
Fowler, A. M. (NZ)
Gedalof, Z. (CA)
Gennaretti, F. (FR)
Griessinger, J. (DE)
Grissino-Mayer, H. (US)
Grudd, H. (SE)
Gunnarson, B. (SE)
Hantemirov, R. (RU)
Herzig, F. (DE)
Hessl, A. (US)
Heussner, K. U. (DE)
Jull, A. J. T. (US)
Kukarskih, V. (RU)
Kirdyanov, A. V. (RU)
Kolář, Tomáš (UEK-B) RID, ORCID, SAI
Krusic, P. J. (SE)
Kyncl, Tomáš (UEK-B)
Lara, A. (CL)
LeQuesne, C. (CL)
Linderholm, H. W. (SE)
Loader, N. J. (GB)
Luckman, B. (CA)
Miyake, F. (JP)
Myglan, V. S. (RU)
Nicolussi, K. (AT)
Oppenheimer, C. (GB)
Palmer, J. (AU)
Panyushkina, I. (RU)
Pederson, N. (US)
Rybníček, Michal (UEK-B) RID, ORCID, SAI
Schweingruber, F. H. (CH)
Seim, A. (SE)
Sigl, M. (US)
Churakova (Sidorova), O. (RU)
Speer, J. H. (US)
Synal, H.-A. (CH)
Tegel, W. (DE)
Treydte, K. (CH)
Villalba, R. (AR)
Wiles, G. (US)
Wilson, R. (US)
Winship, Lawrence J. (US)
Wunder, J. (CH)
Yang, B. (CN)
Young, G. H. F. (GB)Number of authors 67 Article number 3605 Source Title Nature Communications. - : Nature Publishing Group
Roč. 9, sep (2018)Number of pages 5 s. Language eng - English Country GB - United Kingdom Keywords cosmic-ray event ; atmospheric radiocarbon ; ad 774-775 ; c-14 ; graphitization ; variability ; millennium ; dynamics ; gradient ; increase Subject RIV DI - Air Pollution ; Quality OECD category Meteorology and atmospheric sciences R&D Projects GA17-22102S GA ČR - Czech Science Foundation (CSF) Research Infrastructure CzeCOS II - 90061 - Ústav výzkumu globální změny AV ČR, v. v. i. Institutional support UEK-B - RVO:86652079 UT WOS 000443797400006 EID SCOPUS 85052992362 DOI 10.1038/s41467-018-06036-0 Annotation 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 spatiotemporally consistent fingerprints. Here we measure the C-14 content in 484 individual tree rings formed in the periods 770-780 and 990-1000 CE. Distinct C-14 excursions starting in the boreal summer of 774 and the boreal spring of 993 ensure the precise dating of 44 tree-ring records from five continents. We also identify a meridional decline of 11-year mean atmospheric radiocarbon concentrations across both hemispheres. Corroborated by historical eye-witness accounts of red auroras, our results suggest a global exposure to strong solar proton radiation. To improve understanding of the return frequency and intensity of past cosmic events, which is particularly important for assessing the potential threat of space weather on our society, further annually resolved C-14 measurements are needed. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2019
Number of the records: 1