樹木年輪中放射性炭素14濃度測定による7-11世紀の太陽活動の復元

• 三宅 芙沙

• 永冶 健太朗

• 増田 公明

• 中村 俊夫

• Miyake Fusa

• Nagaya Kentaro

• Masuda Kimiaki

• Nakamura Toshio

書誌事項

タイトル別名

• Reconstruction of the solar activity in 7-11 centuries by the carbon 14 content in tree-rings

説明

Radiocarbon 14C is produced by the galactic cosmic rays which are modulated by solar magnetic activity because most cosmic rays are charged particles. 14C is oxidized to form 14CO2 and taken by trees during the carbon cycle. So 14C content in tree-rings is retained for record of the past cosmic ray intensity and the solar activity. We have measured the 14C content in Japanese cedar tree rings from 602 to 1072 AD with 2-year resolution, and found a rapid increase in 14C content at 775 AD. This 775 AD peak is consistent with the decadal IntCal data and the 10Be record from the Antarctic ice core. Therefore, it is highly possible that this peak was recorded all over the world and it was due to the increase in the cosmic ray intensity in 775 AD. The 11-year and 14-year periodicities are detected by the Fourier analysis on the 14C content data from 602 to 1072 AD. These periodicities may come from the solar cycle (Schwabe cycle).

収録刊行物

• 名古屋大学加速器質量分析計業績報告書

  名古屋大学加速器質量分析計業績報告書 22 135-139, 2011-03

  名古屋大学年代測定資料研究センター

キーワード

• Solar cycle
• Cosmogenic nuclide

詳細情報

• CRID: 1390290699422733952
• NII論文ID: 120004146513
• DOI: 10.18999/sumrua.22.135
• HANDLE: 2237/16524
• Web Site: https://nagoya.repo.nii.ac.jp/records/14608
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • IRDB
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用可