Transient Offset in 14C After the Carrington Event Recorded by Polar Tree Rings. / Uusitalo, Joonas; Golubenko, Kseniia; Arppe, Laura; Brehm, Nicolas; Hackman, Thomas; Hayakawa, Hisashi; Helama, Samuli; Mizohata, Kenichiro; Miyake, Fusa; Mäkinen, Harri; Nöjd, Pekka; Tanskanen, Eija; Tokanai, Fuyuki; Rozanov, Eugene; Wacker, Lukas; Usoskin, Ilya; Oinonen, Markku.
In: Geophysical Research Letters, Vol. 51, No. 5, e2023GL106632, 05.03.2024.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Transient Offset in 14C After the Carrington Event Recorded by Polar Tree Rings
AU - Uusitalo, Joonas
AU - Golubenko, Kseniia
AU - Arppe, Laura
AU - Brehm, Nicolas
AU - Hackman, Thomas
AU - Hayakawa, Hisashi
AU - Helama, Samuli
AU - Mizohata, Kenichiro
AU - Miyake, Fusa
AU - Mäkinen, Harri
AU - Nöjd, Pekka
AU - Tanskanen, Eija
AU - Tokanai, Fuyuki
AU - Rozanov, Eugene
AU - Wacker, Lukas
AU - Usoskin, Ilya
AU - Oinonen, Markku
PY - 2024/3/5
Y1 - 2024/3/5
N2 - The Carrington event of 1859 has been the strongest solar flare in the observational history. It plays a crucial role in shedding light on the frequency and impacts of the past and future Solar Energetic Particle (SEP) events on human societies. We address the impact of the Carrington event by measuring tree-ring 14C with multiple replications from high-latitude locations around the event and by comparing them with mid-latitude measurements. A transient offset in 14C following the event is observed with high statistical significance. Our state-of-the-art 14C production and transport model does not reproduce the observational finding, suggesting features beyond present understanding. Particularly, our observation would require partially fast transport of 14C between the stratosphere and troposphere at high latitudes. The observation is consistent with the previous findings with the SEP events of 774 and 993 CE for which faster integration of 14C into tree rings is observed at high latitudes.
AB - The Carrington event of 1859 has been the strongest solar flare in the observational history. It plays a crucial role in shedding light on the frequency and impacts of the past and future Solar Energetic Particle (SEP) events on human societies. We address the impact of the Carrington event by measuring tree-ring 14C with multiple replications from high-latitude locations around the event and by comparing them with mid-latitude measurements. A transient offset in 14C following the event is observed with high statistical significance. Our state-of-the-art 14C production and transport model does not reproduce the observational finding, suggesting features beyond present understanding. Particularly, our observation would require partially fast transport of 14C between the stratosphere and troposphere at high latitudes. The observation is consistent with the previous findings with the SEP events of 774 and 993 CE for which faster integration of 14C into tree rings is observed at high latitudes.
KW - Carrington event
KW - solar eruptions
KW - space weather
KW - stratosphere-troposphere exchange
KW - tree-rings
UR - https://www.mendeley.com/catalogue/f43c1ecb-e531-35d4-9eb7-e44f525c492a/
U2 - 10.1029/2023GL106632
DO - 10.1029/2023GL106632
M3 - Article
VL - 51
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 5
M1 - e2023GL106632
ER -
ID: 122467923