Tree-rings reveal two strong solar proton events in 7176 and 5259 BCE
Abstract The Sun sporadically produces eruptive events leading to intense fluxes of solar energetic particles (SEPs) that dramatically disrupt the near-Earth radiation environment. Such events have been directly studied for the last decades but little is known about the occurrence and magnitude of r...
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ftsubgoettingen:oai:publications.goettingen-research-online.de:2/105515 2023-09-05T13:20:12+02:00 Tree-rings reveal two strong solar proton events in 7176 and 5259 BCE Brehm, Nicolas Christl, Marcus Knowles, Timothy D. J. Casanova, Emmanuelle Evershed, Richard P. Adolphi, Florian Muscheler, Raimund Synal, Hans-Arno Mekhaldi, Florian Paleari, Chiara I. Wacker, Lukas 2022 https://resolver.sub.uni-goettingen.de/purl?gro-2/105515 https://doi.org/10.1038/s41467-022-28804-9 en eng 2041-1723 https://resolver.sub.uni-goettingen.de/purl?gro-2/105515 doi:10.1038/s41467-022-28804-9 28804 https://creativecommons.org/licenses/by/4.0 journal_article yes 2022 ftsubgoettingen https://doi.org/10.1038/s41467-022-28804-9 2023-08-20T22:16:15Z Abstract The Sun sporadically produces eruptive events leading to intense fluxes of solar energetic particles (SEPs) that dramatically disrupt the near-Earth radiation environment. Such events have been directly studied for the last decades but little is known about the occurrence and magnitude of rare, extreme SEP events. Presently, a few events that produced measurable signals in cosmogenic radionuclides such as 14 C, 10 Be and 36 Cl have been found. Analyzing annual 14 C concentrations in tree-rings from Switzerland, Germany, Ireland, Russia, and the USA we discovered two spikes in atmospheric 14 C occurring in 7176 and 5259 BCE. The ~2% increases of atmospheric 14 C recorded for both events exceed all previously known 14 C peaks but after correction for the geomagnetic field, they are comparable to the largest event of this type discovered so far at 775 CE. These strong events serve as accurate time markers for the synchronization with floating tree-ring and ice core records and provide critical information on the previous occurrence of extreme solar events which may threaten modern infrastructure. Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung Article in Journal/Newspaper ice core Georg-August-Universität Göttingen: GoeScholar Nature Communications 13 1 |
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Open Polar |
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Georg-August-Universität Göttingen: GoeScholar |
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ftsubgoettingen |
language |
English |
description |
Abstract The Sun sporadically produces eruptive events leading to intense fluxes of solar energetic particles (SEPs) that dramatically disrupt the near-Earth radiation environment. Such events have been directly studied for the last decades but little is known about the occurrence and magnitude of rare, extreme SEP events. Presently, a few events that produced measurable signals in cosmogenic radionuclides such as 14 C, 10 Be and 36 Cl have been found. Analyzing annual 14 C concentrations in tree-rings from Switzerland, Germany, Ireland, Russia, and the USA we discovered two spikes in atmospheric 14 C occurring in 7176 and 5259 BCE. The ~2% increases of atmospheric 14 C recorded for both events exceed all previously known 14 C peaks but after correction for the geomagnetic field, they are comparable to the largest event of this type discovered so far at 775 CE. These strong events serve as accurate time markers for the synchronization with floating tree-ring and ice core records and provide critical information on the previous occurrence of extreme solar events which may threaten modern infrastructure. Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung |
format |
Article in Journal/Newspaper |
author |
Brehm, Nicolas Christl, Marcus Knowles, Timothy D. J. Casanova, Emmanuelle Evershed, Richard P. Adolphi, Florian Muscheler, Raimund Synal, Hans-Arno Mekhaldi, Florian Paleari, Chiara I. Wacker, Lukas |
spellingShingle |
Brehm, Nicolas Christl, Marcus Knowles, Timothy D. J. Casanova, Emmanuelle Evershed, Richard P. Adolphi, Florian Muscheler, Raimund Synal, Hans-Arno Mekhaldi, Florian Paleari, Chiara I. Wacker, Lukas Tree-rings reveal two strong solar proton events in 7176 and 5259 BCE |
author_facet |
Brehm, Nicolas Christl, Marcus Knowles, Timothy D. J. Casanova, Emmanuelle Evershed, Richard P. Adolphi, Florian Muscheler, Raimund Synal, Hans-Arno Mekhaldi, Florian Paleari, Chiara I. Wacker, Lukas |
author_sort |
Brehm, Nicolas |
title |
Tree-rings reveal two strong solar proton events in 7176 and 5259 BCE |
title_short |
Tree-rings reveal two strong solar proton events in 7176 and 5259 BCE |
title_full |
Tree-rings reveal two strong solar proton events in 7176 and 5259 BCE |
title_fullStr |
Tree-rings reveal two strong solar proton events in 7176 and 5259 BCE |
title_full_unstemmed |
Tree-rings reveal two strong solar proton events in 7176 and 5259 BCE |
title_sort |
tree-rings reveal two strong solar proton events in 7176 and 5259 bce |
publishDate |
2022 |
url |
https://resolver.sub.uni-goettingen.de/purl?gro-2/105515 https://doi.org/10.1038/s41467-022-28804-9 |
genre |
ice core |
genre_facet |
ice core |
op_relation |
2041-1723 https://resolver.sub.uni-goettingen.de/purl?gro-2/105515 doi:10.1038/s41467-022-28804-9 28804 |
op_rights |
https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.1038/s41467-022-28804-9 |
container_title |
Nature Communications |
container_volume |
13 |
container_issue |
1 |
_version_ |
1776200915663978496 |