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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F18%3A43913957" target="_blank" >RIV/62156489:43410/18:43913957 - isvavai.cz</a>

Alternative codes found

RIV/86652079:_____/18:00495446 RIV/00216224:14310/18:00113257

Result on the web

<a href="https://doi.org/10.1038/s41467-018-06036-0" target="_blank" >https://doi.org/10.1038/s41467-018-06036-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41467-018-06036-0" target="_blank" >10.1038/s41467-018-06036-0</a>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10511 - Environmental sciences (social aspects to be 5.7)

Project

<a href="/en/project/GA17-22102S" target="_blank" >GA17-22102S: 2000 years of PALeoclimatology and Ecology from Oak stable isotopes in the Czech Republic (PALEO)</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Nature Communications

ISSN

2041-1723

e-ISSN

—

Volume of the periodical

9

Issue of the periodical within the volume

September

Country of publishing house

GB - UNITED KINGDOM

Number of pages

7

Pages from-to

"Nestrankovano"

UT code for WoS article

000443797400006

EID of the result in the Scopus database

2-s2.0-85052992362