A Single-Year Cosmic Ray Event at 5410 BCE Registered in C-14 of Tree Rings

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http://hdl.handle.net/10138/332663

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Miyake , F , Panyushkina , I , Jull , T , Adolphi , F , Brehm , N , Helama , S , Kanzawa , K , Moriya , T , Muscheler , R , Nicolussi , K , Oinonen , M , Salzer , M , Takeyama , M , Tokanai , F & Wacker , L 2021 , ' A Single-Year Cosmic Ray Event at 5410 BCE Registered in C-14 of Tree Rings ' , Geophysical Research Letters , vol. 48 , no. 11 , ARTN e2021GL093419 . https://doi.org/10.1029/2021GL093419

Title: A Single-Year Cosmic Ray Event at 5410 BCE Registered in C-14 of Tree Rings
Author: Miyake, Fusa; Panyushkina, Irina; Jull, Tim; Adolphi, Florian; Brehm, N; Helama, Samuli; Kanzawa, K; Moriya, T; Muscheler, Raimund; Nicolussi, K; Oinonen, Markku; Salzer, M; Takeyama, M; Tokanai, F; Wacker, Lucas
Other contributor: University of Helsinki, Finnish Museum of Natural History
Date: 2021-06-16
Language: eng
Number of pages: 8
Belongs to series: Geophysical Research Letters
ISSN: 0094-8276
DOI: https://doi.org/10.1029/2021GL093419
URI: http://hdl.handle.net/10138/332663
Abstract: The annual C-14 data in tree rings is an outstanding proxy for uncovering extreme solar energetic particle (SEP) events in the past. Signatures of extreme SEP events have been reported in 774/775 CE, 992/993 CE, and similar to 660 BCE. Here, we report another rapid increase of C-14 concentration in tree rings from California, Switzerland, and Finland around 5410 BCE. These C-14 data series show a significant increase of similar to 6 parts per thousand in 5411-5410 BCE. The signature of C-14 variation is very similar to the confirmed three SEP events and points to an extreme short-term flux of cosmic ray radiation into the atmosphere. The rapid C-14 increase in 5411/5410 BCE rings occurred during a period of high solar activity and 60 years after a grand C-14 excursion during 5481-5471 BCE. The similarity of our C-14 data to previous events suggests that the origin of the 5410 BCE event is an extreme SEP event.
Subject: AD 775
ANNUAL BE-10 DATA
BRISTLECONE-PINE
CHRONOLOGY
DELTA-C-14
INCREASE
MULTIRADIONUCLIDE EVIDENCE
RADIOCARBON
SIGNATURE
SOLAR PROTON EVENT
cosmogenic nuclide
radiocarbon
solar activity
solar energetic particle
tree rings
1171 Geosciences
114 Physical sciences
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