Multiradionuclide evidence for the solar origin of the cosmic-ray events of ᴀᴅ 774/5 and 993/4

@inproceedings{Mekhaldi2015MultiradionuclideEF,
  title={Multiradionuclide evidence for the solar origin of the cosmic-ray events of ᴀᴅ 774/5 and 993/4},
  author={Florian Mekhaldi and Raimund Muscheler and Florian Adolphi and Ala Aldahan and J. H. de Beer and Joseph R McConnell and G{\"o}ran Possnert and Michael Sigl and Anders M Svensson and Hans-Arno Synal and Kees C. Welten and Thomas E Woodruff},
  booktitle={Nature communications},
  year={2015}
}
The origin of two large peaks in the atmospheric radiocarbon ((14)C) 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 (14)C 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 (10)Be measurements from both Arctic and Antarctic ice cores. Using ice core (36)Cl… CONTINUE READING
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The authors declare no competing financial interests

  • T. Absolute production of radiocarbon Goslar, 743–749 . Acknowledgements We thank Anna Sturevik Storm fo the long-term trend of atmospheric radiocarbon. Ra, +28 authors its analysis. A.A. contributed to the preparation of t interests
  • Reprints and permission information is available…
  • 2015

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