Počet záznamů: 1
Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE
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SYSNO ASEP 0495446 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE Tvůrce(i) 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)Celkový počet autorů 67 Číslo článku 3605 Zdroj.dok. Nature Communications. - : Nature Publishing Group
Roč. 9, sep (2018)Poč.str. 5 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova cosmic-ray event ; atmospheric radiocarbon ; ad 774-775 ; c-14 ; graphitization ; variability ; millennium ; dynamics ; gradient ; increase Vědní obor RIV DI - Znečištění a kontrola vzduchu Obor OECD Meteorology and atmospheric sciences CEP GA17-22102S GA ČR - Grantová agentura ČR Výzkumná infrastruktura CzeCOS II - 90061 - Ústav výzkumu globální změny AV ČR, v. v. i. Institucionální podpora UEK-B - RVO:86652079 UT WOS 000443797400006 EID SCOPUS 85052992362 DOI 10.1038/s41467-018-06036-0 Anotace 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. Pracoviště Ústav výzkumu globální změny Kontakt Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Rok sběru 2019
Počet záznamů: 1