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Another rapid event in the carbon-14 content of tree rings

Author

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  • Fusa Miyake

    (Solar-Terrestrial Environment Laboratory, Nagoya University, Chikusa-ku)

  • Kimiaki Masuda

    (Solar-Terrestrial Environment Laboratory, Nagoya University, Chikusa-ku)

  • Toshio Nakamura

    (Center for Chronological Research, Nagoya University, Chikusa-ku)

Abstract

Previously, we have observed that the atmospheric 14C content measured in tree rings showed a strong increase from AD 774 to 775. Although the cause of this event can be explained by a large solar proton event or a short gamma-ray burst, a more detailed discussion of the cause is difficult because the rate of occurrence of such rapid 14C events remains unknown. Here we report new 14C measurements from AD 822 to 1021, and the discovery of a second rapid increase of 14C content from AD 993 to 994. The 10Be flux in the Antarctic ice core shows peaks corresponding to these two 14C events. The proportions of flux increase (14C/10Be) of the two events are consistent with each other. Therefore, it is highly possible that these events have the same origin. Considering the occurrence rate of 14C increase events, solar activity is a plausible cause of the 14C increase events.

Suggested Citation

  • Fusa Miyake & Kimiaki Masuda & Toshio Nakamura, 2013. "Another rapid event in the carbon-14 content of tree rings," Nature Communications, Nature, vol. 4(1), pages 1-6, June.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms2783
    DOI: 10.1038/ncomms2783
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    Cited by:

    1. Ilan Noy & Tomáš Uher, 2022. "Four New Horsemen of an Apocalypse? Solar Flares, Super-volcanoes, Pandemics, and Artificial Intelligence," Economics of Disasters and Climate Change, Springer, vol. 6(2), pages 393-416, July.

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