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屋久杉年輪中14C濃度測定による7-8世紀の太陽活動周期長の研究
https://doi.org/10.18999/sumrua.24.140
https://doi.org/10.18999/sumrua.24.140bcbe13ef-d860-4dca-a648-702e9c62bd2f
名前 / ファイル | ライセンス | アクション |
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sumrua_24_140.pdf (4.2 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2014-06-09 | |||||
タイトル | ||||||
タイトル | 屋久杉年輪中14C濃度測定による7-8世紀の太陽活動周期長の研究 | |||||
言語 | ja | |||||
その他のタイトル | ||||||
その他のタイトル | A study of the solar activity cycle in 7-8th centuries by the carbon 14 content in Yaku-cedar tree-rings | |||||
言語 | en | |||||
著者 |
三宅, 芙沙
× 三宅, 芙沙× 増田, 公明× 中村, 俊夫× Miyake, Fusa× Masuda, Kimiaki× Nakamura, Toshio |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | solar cycle | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | cosmogenic nuclide | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | solar dynamo | |||||
抄録 | ||||||
内容記述 | Radiocarbon (14C) is produced in the upper atmosphere by galactic cosmic rays, which are modulated by solar magnetic activity. Its content in tree rings is retained and provides a record of past cosmic ray intensity and solar activity. We have measured the 14C content in Japanese cedar tree rings from AD 600 to 760, a time interval that includes a grand solar minimum in the 7th century, with a resolution of 2 year. Periodicity analysis of the 14C data shows that there is a component in the frequency band of the Schwabe cycle, with a period of 12-13 years continuing throughout the minimum. This is the fourth case in which an increase in the length of the Schwabe cycle has been observed in a grand solar minimum, after the Maunder Minimum, the Spörer Minimum,and the 4th century BC Minimum. In addition to the increase in the cycle length, it was also found that short frequency components appear in preceding and the beginning of the minimum. It is possible that this short component is related to the solar dynamo. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
内容記述 | ||||||
内容記述 | 名古屋大学年代測定総合研究センターシンポジウム報告 | |||||
言語 | ja | |||||
内容記述タイプ | Other | |||||
出版者 | ||||||
言語 | ja | |||||
出版者 | 名古屋大学年代測定資料研究センター | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
ID登録 | ||||||
ID登録 | 10.18999/sumrua.24.140 | |||||
ID登録タイプ | JaLC | |||||
書誌情報 |
ja : 名古屋大学加速器質量分析計業績報告書 巻 24, p. 140-144, 発行日 2013-03 |
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著者版フラグ | ||||||
値 | publisher |