Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Multiradionuclide evidence for the solar origin of the cosmic-ray events of AD 774/5 and 993/4
Visa övriga samt affilieringar
Ansvarig organisation
2015 (Engelska)Ingår i: Nature Communications, E-ISSN 2041-1723, Vol. 6, artikel-id 8611Artikel i tidskrift (Refereegranskat) Published
Resurstyp
Text
Abstract [en]

The origin of two large peaks in the atmospheric radiocarbon (C-14) concentration at AD 774/5 and 993/4 is still debated. There is consensus, however, that these features can only be explained by an increase in the atmospheric C-14 production rate due to an extraterrestrial event. Here we provide evidence that these peaks were most likely produced by extreme solar events, based on several new annually resolved Be-10 measurements from both Arctic and Antarctic ice cores. Using ice core Cl-36 data in pair with Be-10, we further show that these solar events were characterized by a very hard energy spectrum with high fluxes of solar protons with energy above 100MeV. These results imply that the larger of the two events (AD 774/5) was at least five times stronger than any instrumentally recorded solar event. Our findings highlight the importance of studying the possibility of severe solar energetic particle events.

Ort, förlag, år, upplaga, sidor
2015. Vol. 6, artikel-id 8611
Forskningsämne
SWEDARCTIC 2002, NordGRIP 2002
Identifikatorer
URN: urn:nbn:se:polar:diva-2875DOI: 10.1038/ncomms9611ISI: 000364934200013PubMedID: 26497389OAI: oai:DiVA.org:polar-2875DiVA, id: diva2:929755
Forskningsfinansiär
PolarforskningssekretariatetTillgänglig från: 2016-05-19 Skapad: 2016-05-19 Senast uppdaterad: 2023-03-28

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextPubMed

Sök vidare i DiVA

Av författaren/redaktören
Svensson, Anders
I samma tidskrift
Nature Communications

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
pubmed
urn-nbn

Altmetricpoäng

doi
pubmed
urn-nbn
Totalt: 46 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf