Abstract
| Original language | English |
|---|---|
| Article number | 3495 |
| Journal | Nature Communications |
| Volume | 9 |
| Issue number | 1 |
| Number of pages | 8 |
| ISSN | 2041-1723 |
| DOIs | |
| Publication status | Published - 28 Aug 2018 |
| MoE publication type | A1 Journal article-refereed |
Bibliographical note
Correction:
Nature communications 10, article number: 1292 (2019)
DOI: 10.1038/s41467-019-09214-w
Fields of Science
- 115 Astronomy, Space science
- FINNISH LAPLAND
- C-14
- ATMOSPHERE
- INCREASE
- BE-10
- RADIOCARBON
- TROPOPAUSE
- SIGNALS
- CARBON
- MODEL
Cite this
}
Solar superstorm of AD 774 recorded subannually by Arctic tree rings. / Uusitalo, J.; Arppe, L.; Hackman, T.; Helama, S.; Kovaltsov, G.; Mielikäinen, K.; Mäkinen, H.; Nöjd, P.; Palonen, V.; Usoskin, I.; Oinonen, M.
In: Nature Communications, Vol. 9, No. 1, 3495, 28.08.2018.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Solar superstorm of AD 774 recorded subannually by Arctic tree rings
AU - Uusitalo, J.
AU - Arppe, L.
AU - Hackman, T.
AU - Helama, S.
AU - Kovaltsov, G.
AU - Mielikäinen, K.
AU - Mäkinen, H.
AU - Nöjd, P.
AU - Palonen, V.
AU - Usoskin, I.
AU - Oinonen, M.
N1 - Correction: Nature communications 10, article number: 1292 (2019) DOI: 10.1038/s41467-019-09214-w
PY - 2018/8/28
Y1 - 2018/8/28
N2 - Recently, a rapid increase in radiocarbon (14C) was observed in Japanese tree rings at AD 774/775. Various explanations for the anomaly have been offered, such as a supernova, a γ-ray burst, a cometary impact, or an exceptionally large Solar Particle Event (SPE). However, evidence of the origin and exact timing of the event remains incomplete. In particular, a key issue of latitudinal dependence of the 14C intensity has not been addressed yet. Here, we show that the event was most likely caused by the Sun and occurred during the spring of AD 774. Particularly, the event intensities from various locations show a strong correlation with the latitude, demonstrating a particle-induced 14C poleward increase, in accord with the solar origin of the event. Furthermore, both annual 14C data and carbon cycle modelling, and separate earlywood and latewood 14C measurements, confine the photosynthetic carbon fixation to around the midsummer.
AB - Recently, a rapid increase in radiocarbon (14C) was observed in Japanese tree rings at AD 774/775. Various explanations for the anomaly have been offered, such as a supernova, a γ-ray burst, a cometary impact, or an exceptionally large Solar Particle Event (SPE). However, evidence of the origin and exact timing of the event remains incomplete. In particular, a key issue of latitudinal dependence of the 14C intensity has not been addressed yet. Here, we show that the event was most likely caused by the Sun and occurred during the spring of AD 774. Particularly, the event intensities from various locations show a strong correlation with the latitude, demonstrating a particle-induced 14C poleward increase, in accord with the solar origin of the event. Furthermore, both annual 14C data and carbon cycle modelling, and separate earlywood and latewood 14C measurements, confine the photosynthetic carbon fixation to around the midsummer.
KW - 115 Astronomy, Space science
KW - FINNISH LAPLAND
KW - C-14
KW - ATMOSPHERE
KW - INCREASE
KW - BE-10
KW - RADIOCARBON
KW - TROPOPAUSE
KW - SIGNALS
KW - CARBON
KW - MODEL
U2 - 10.1038/s41467-018-05883-1
DO - 10.1038/s41467-018-05883-1
M3 - Article
VL - 9
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
IS - 1
M1 - 3495
ER -