Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE
文献类型:期刊论文
作者 | Buntgen, Ulf1,2,3,4; Wacker, Lukas5; Galvan, J. Diego2; Arnold, Stephanie5; Arseneault, Dominique6; Baillie, Michael7; Beer, Jurg8; Bernabei, Mauro9; Bleicher, Niels10; Boswijk, Gretel11 |
刊名 | NATURE COMMUNICATIONS |
出版日期 | 2018-09-06 |
卷号 | 9页码:7 |
ISSN号 | 2041-1723 |
DOI | 10.1038/s41467-018-06036-0 |
通讯作者 | Buntgen, Ulf(ulf.buentgen@geog.cam.ac.uk) ; Wacker, Lukas(wacker@phys.ethz.ch) |
英文摘要 | 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. |
收录类别 | SCI |
WOS关键词 | COSMIC-RAY EVENT ; ATMOSPHERIC RADIOCARBON ; AD 774-775 ; C-14 ; GRAPHITIZATION ; VARIABILITY ; MILLENNIUM ; DYNAMICS ; GRADIENT ; INCREASE |
WOS研究方向 | Science & Technology - Other Topics |
WOS类目 | Multidisciplinary Sciences |
语种 | 英语 |
出版者 | NATURE PUBLISHING GROUP |
WOS记录号 | WOS:000443797400006 |
URI标识 | http://www.irgrid.ac.cn/handle/1471x/2557757 |
专题 | 寒区旱区环境与工程研究所 |
通讯作者 | Buntgen, Ulf; Wacker, Lukas |
作者单位 | 1.Univ Cambridge, Dept Geog, Cambridge CB2 3EN, England 2.Swiss Fed Res Inst WSL, CH-8903 Birmensdorf, Switzerland 3.Global Change Res Inst CAS, Brno 60300, Czech Republic 4.Masaryk Univ, Dept Geog, Brno 61137, Czech Republic 5.Swiss Fed Inst Technol, Lab Ion Beam Phys, CH-8093 Zurich, Switzerland 6.Univ Quebec Rimouski, Dept Biol Chim & Geog, Rimouski, PQ G5L 3A1, Canada 7.Queens Univ, Sch Nat & Built Environm, Belfast BT7 1NN, Antrim, North Ireland 8.Swiss Fed Inst Aquat Sci & Technol Eawag, CH-8600 Dubendorf, Switzerland 9.CNR, Trees & Timber Inst, IVALSA, I-38010 San Michele All Adige, TN, Italy 10.Off Urbanism, Competence Ctr Underwater Archaeol & Dendrochrono, CH-8008 Zurich, Switzerland |
推荐引用方式 GB/T 7714 | Buntgen, Ulf,Wacker, Lukas,Galvan, J. Diego,et al. Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE[J]. NATURE COMMUNICATIONS,2018,9:7. |
APA | Buntgen, Ulf.,Wacker, Lukas.,Galvan, J. Diego.,Arnold, Stephanie.,Arseneault, Dominique.,...&Young, Giles H. F..(2018).Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE.NATURE COMMUNICATIONS,9,7. |
MLA | Buntgen, Ulf,et al."Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE".NATURE COMMUNICATIONS 9(2018):7. |
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来源:寒区旱区环境与工程研究所
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