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年輪中^<14>C濃度測定によるシュぺーラー極小期の太陽活動の研究(第15回名古屋大学タンデトロン加速器質量分析計シンポジウム(平成14(2002)年度)報告)
https://doi.org/10.18999/sumrua.14.66
https://doi.org/10.18999/sumrua.14.66429d1a65-0c62-4bec-80a7-7480753f1485
名前 / ファイル | ライセンス | アクション |
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KJ00005461725.pdf (433.3 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2010-06-02 | |||||
タイトル | ||||||
タイトル | 年輪中^<14>C濃度測定によるシュぺーラー極小期の太陽活動の研究(第15回名古屋大学タンデトロン加速器質量分析計シンポジウム(平成14(2002)年度)報告) | |||||
言語 | ja | |||||
その他のタイトル | ||||||
その他のタイトル | Variation of solar activity during the Spoerer Minimum(Proceedings of the 15^<th> Symposium on Researches Using the Tandetron AMS System at Nagoya University in 2002) | |||||
言語 | en | |||||
著者 |
宮原, ひろ子
× 宮原, ひろ子× Miyahara, Hiroko× 古澤, 秀樹× Furuzawa, Hideki× 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 change in the solar activity. Investigation of the ^<14>C contents in each tree ring gives information on the change of solar activity in the past. We have focused on the solar variation during the grand minima, when the solar activity was extremely weak and almost no sunspot appeared. In some prior studies, the existence of the 22-year periodicity during the Maunder Minimum (1645-1720 AD) was suggested. To clarify whether the 22-year periodicity is common in the grand minima, we have investigated the solar activity during the Spoerer Minimum (1514-1534 AD). We measured the ^<14>C contents in the 714-year-old Japanese cedar tree by the accelerator mass spectrometry (AMS). Time series of the data were examined by Fourier analysis and by the band pass filtering. They showed the following periods; 7.4yr, 10.8yr and 23.3yr. The amplitude of 10.8yr period was stronger than that of 23.3yr, though the feature of amplitude variation of them differed. The periodicity of 22 years showed constant amplitude, however 11-year cycle was attenuated during the mid 40 years of the Spoerer Minimum. During the mid 40 years, the amplitude of 11-year cycle and 22-year cycle were equivalent. Thus, It is possible to say that the 22-year periodicity can be observed when the solar activity is quite weakened. We continue this study to get more detailed characteristics of the solar activity during the grand minima. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
内容記述 | ||||||
内容記述 | 第15回名古屋大学タンデトロン加速器質量分析計シンポジウム(平成14年(2002年度)報告 Proceedings of the 15th Symposium on Researches Using the Tandetron AMS System at Nagoya University in 2002 日時:平成15 (2003)年1月30日(木)、31日(金) 会場:名古屋大学シンポジオン Date:January 30th and 31st,2003 Place:Nagoya University Symposion Hall | |||||
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.14.66 | |||||
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/110007150866/ | |||||
書誌情報 |
ja : 名古屋大学加速器質量分析計業績報告書 巻 14, p. 66-71, 発行日 2003-03 |
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フォーマット | ||||||
application/pdf | ||||||
著者版フラグ | ||||||
値 | publisher |