Show simple item record

dc.contributor.authorBrehm, N.
dc.contributor.authorChristl, M.
dc.contributor.authorKnowles, T.D.J.
dc.contributor.authorCasanova, E.
dc.contributor.authorEvershed, R.P.
dc.contributor.authorAdolphi, F.
dc.contributor.authorMuscheler, R.
dc.contributor.authorSynal, H.-A.
dc.contributor.authorMekhaldi, F.
dc.contributor.authorPaleari, C.I.
dc.contributor.authorLeuschner, H.-H.
dc.contributor.authorBayliss, A.
dc.contributor.authorNicolussi, K.
dc.contributor.authorPichler, T.
dc.contributor.authorSchlüchter, C.
dc.contributor.authorPearson, C.L.
dc.contributor.authorSalzer, M.W.
dc.contributor.authorFonti, P.
dc.contributor.authorNievergelt, D.
dc.contributor.authorHantemirov, R.
dc.contributor.authorBrown, D.M.
dc.contributor.authorUsoskin, I.
dc.contributor.authorWacker, L.
dc.date.accessioned2022-04-11T23:18:30Z
dc.date.available2022-04-11T23:18:30Z
dc.date.issued2022
dc.identifier.citationBrehm, N., Christl, M., Knowles, T. D. J., Casanova, E., Evershed, R. P., Adolphi, F., Muscheler, R., Synal, H.-A., Mekhaldi, F., Paleari, C. I., Leuschner, H.-H., Bayliss, A., Nicolussi, K., Pichler, T., Schlüchter, C., Pearson, C. L., Salzer, M. W., Fonti, P., Nievergelt, D., … Wacker, L. (2022). Tree-rings reveal two strong solar proton events in 7176 and 5259 BCE. Nature Communications.
dc.identifier.issn2041-1723
dc.identifier.pmid35256613
dc.identifier.doi10.1038/s41467-022-28804-9
dc.identifier.urihttp://hdl.handle.net/10150/663981
dc.description.abstractThe 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 14C, 10Be and 36Cl have been found. Analyzing annual 14C concentrations in tree-rings from Switzerland, Germany, Ireland, Russia, and the USA we discovered two spikes in atmospheric 14C occurring in 7176 and 5259 BCE. The ~2% increases of atmospheric 14C recorded for both events exceed all previously known 14C 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. © 2022, The Author(s).
dc.language.isoen
dc.publisherNature Research
dc.rightsCopyright © The Author(s) 2022. This article is licensed under a Creative Commons Attribution 4.0 International License.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleTree-rings reveal two strong solar proton events in 7176 and 5259 BCE
dc.typeArticle
dc.typetext
dc.contributor.departmentUniversity of Arizona, the Laboratory for Tree-Ring Research
dc.identifier.journalNature Communications
dc.description.noteOpen access journal
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
dc.eprint.versionFinal published version
dc.source.journaltitleNature Communications
refterms.dateFOA2022-04-11T23:18:30Z


Files in this item

Thumbnail
Name:
s41467-022-28804-9.pdf
Size:
1.473Mb
Format:
PDF
Description:
Final Published Version

This item appears in the following Collection(s)

Show simple item record

Copyright © The Author(s) 2022. This article is licensed under a Creative Commons Attribution 4.0 International License.
Except where otherwise noted, this item's license is described as Copyright © The Author(s) 2022. This article is licensed under a Creative Commons Attribution 4.0 International License.