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["^\u003c14\u003eC濃度変動を用いた太陽活動の周期性の解析(第18回名古屋大学年代測定総合研究センターシンポジウム平成17(2005)年度報告)"], "weko_shared_id": -1}
^<14>C濃度変動を用いた太陽活動の周期性の解析(第18回名古屋大学年代測定総合研究センターシンポジウム平成17(2005)年度報告)
https://doi.org/10.18999/sumrua.17.50
https://doi.org/10.18999/sumrua.17.50c339afb3-481f-4b7f-bbf1-2296bbf72f74
名前 / ファイル | ライセンス | アクション |
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KJ00005461828.pdf (786.6 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2010-06-07 | |||||
タイトル | ||||||
タイトル | ^<14>C濃度変動を用いた太陽活動の周期性の解析(第18回名古屋大学年代測定総合研究センターシンポジウム平成17(2005)年度報告) | |||||
言語 | ja | |||||
その他のタイトル | ||||||
その他のタイトル | Analysis of the periodicity of the solar activity deduced from ^<14>C content(Proceedings of the 18^<th> Symposium on Chronological Studies at the Nagoya University Center for Chronological Research in 2005) | |||||
言語 | en | |||||
著者 |
桑名, 宏輔
× 桑名, 宏輔× Kuwana, Kosuke× 宮原, ひろ子× Miyahara, Hiroko× 毛受, 弘彰× Menjo, Hiroai× 永冶, 健太朗× Nagaya, Kentaro× 増田, 公明× Masuda, Kimiaki× 村木, 綏× Muraki, Yasushi× 中村, 俊夫× 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 | |||||
権利 | ||||||
言語 | ja | |||||
権利情報 | 名古屋大学年代測定資料研究センター | |||||
権利 | ||||||
言語 | ja | |||||
権利情報 | 本文データは学協会の許諾に基づきCiNiiから複製したものである | |||||
抄録 | ||||||
内容記述 | Radiocarbon ^<14>C, which is one of cosmogenic radioisotopes, is a good index of solar activity. Investigation of the ^<14>C content in each tree ring gives information on the change of solar activity in the past. Variation of the ^<14>C content shows that grand solar minima, when the solar activity was extremely weak for several ten years or more, occurred many times in the past. The Maunder Minimum (1645-1720 AD), one of the grand solar minima in the last millennium, is well known to have had almost no sunspots, and then periodicity of solar activity cannot be seen. Therefore, we have investigated the periodicity of radiocarbon content in tree rings in order to clarify the characteristics of variation of solar activity during the grand solar minima. We have already obtained the ^<14>C records for 1413-1554 AD including the Spoerer Minimum and for 1617-1745 AD including the Maunder Minimum with annual time resolution by using Japanese cedar trees. As a result of frequency analysis of these radiocarbon records, we found that the Sun maintained periodic variation even if the minima. We found, however, the length of the "eleven-year" cycle during the Maunder Minimum was around 14 years and that during the Spoerer Minimum was around 11 years. This suggests that the cycle length is related to solar activity, and that the pattern of periodicity of solar activity for the type of grand solar minimum. In order to clarify these possibilities, we have investigated periodicity of solar activity in periods other than the grand solar minimum by measuring the ^<14>C content in the period between the Maunder Minimum and the Spoerer Minimum (1555-1615 AD) and 9^<th>-10^<th> centuries (880-964AD). As a result, we found that the length of the "eleven-year" cycle during the normal period was around 11 years, which was expected from the modern solar activity. This result supports the difference in the cycle length in each solar minimum mentioned above. Furthermore, inverse correlation of the strength of solar activity and the cycle length is suggested. Our results should be a great clue as to the mechanism to which solar activity becomes weak and bases for studies of long-term solar periodic variations. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
内容記述 | ||||||
内容記述 | 第18回名古屋大学年代測定総合研究センターシンポジウム平成17(2005)年度報告 Proceedings of the 18th symposiumon on Chronological Studies at the Nagoya University Center for Chronological Research\ in 2005 日時:平成18 (2006)年1月17日(火)、18日(水) 会場:名古屋大学シンポジオン Date:Januaryl7th and 18th, 2006 Venue:Nagoya Uhiversity Symposion Hall |
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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.17.50 | |||||
ID登録タイプ | JaLC | |||||
関連情報 | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | URI | |||||
関連識別子 | http://ci.nii.ac.jp/naid/110007150953/ | |||||
書誌情報 |
ja : 名古屋大学加速器質量分析計業績報告書 巻 17, p. 50-59, 発行日 2006-03 |
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フォーマット | ||||||
application/pdf | ||||||
著者版フラグ | ||||||
値 | publisher |