Rapid increase events of cosmic-rays in the past three thousand years and there effects on the earth

• Project/Area Number: 26287042
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Nagoya University
• Principal Investigator: Masuda Kimiaki 名古屋大学, 宇宙地球環境研究所, 准教授 (40173744)
• Research Collaborator: MIYAKE Fusa ; ITOW Yoshitaka ; SAKO Takashi ; MATSUMI Yutaka ; NAKAYAMA Tomoki ; SUZUKI Asami ; TAKEUCHI Yuya ; MORI Chihiro ; KOJIMA Yasusuke ; ADACHI Takumi ; FUJIMORI Ryuji
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000); Fiscal Year 2016: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2015: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2014: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
• Keywords: 宇宙線 / 宇宙高エネルギー現象 / 放射性炭素 / エアロゾル / 雲凝縮核生成 / 太陽活動 / 雲凝結核生成 / 炭素14 / 地球環境

Outline of Final Research Achievements

Galactic cosmic rays come to the earth under the solar effect and produce 14C nuclei in the atmosphere, being archived in tree rings. Measurement of past 14C content with 1-2 year resolution tells us a detailed history of cosmic ray intensity. Here we obtained characteristics of the sun during AD500-1350. Also we surveyed cosmic ray intensity in a part of past 7000 years and found a rapid increase, being considered to be due to abnormal solar activities.
We confirmed by accelerator experiments using heavy-ions that ion-induced cloud condensation nuclei can be produced from ionization by cosmic-ray particles in atmosphere. Produced ion density and size distributions of produced aerosol particles were measured and no clear change in characteristics of particle production was observed for kind of heavy ion.

Research Products

• [Int'l Joint Research] Univ. of Arizona(米国)
• [Int'l Joint Research] ETH, Zurich(Switzerland)
• [Int'l Joint Research] University of Arizona(米国)
• [Int'l Joint Research] ETH Zurich(Switzerland)
• [Journal Article] Verification of the Annual Dating of the 10th Century Baitoushan Volcano Eruption Based on an AD 774-775 Radiocarbon Spike (2018)
  • Author(s): Hakozaki, M., Miyake, F., Nakamura, T., Kimura, K., Masuda, K., & Okuno, M
  • Journal Title: Radiocarbon Volume: 60 Issue: 1 Pages: 261-268
  • DOI: 10.1017/rdc.2017.75
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Large 14C excursion in 5480 BC indicates an abnormal sun in the mid-Holocene (2017)
  • Author(s): F. Miyake, A.J.T. Jull, I.P. Panyushkina, L. Wacker, M. Salzer, C.H. Baisan, T. Lange, R. Cruz, K. Masuda & T. Nakamura
  • Journal Title: PNAS Volume: 114 Issue: 5 Pages: 881-884
  • DOI: 10.1073/pnas.1613144114
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Search for annual 14C excursion in the past (2016)
  • Author(s): F. Miyake, K. Masuda, T. Nakamura, K. Kimura, M. Hakozaki, A.J.T. Jull, T.E. Lange, R. Cruz, I.P. Panyushkina, C. Baisan & M.W. Salzer
  • Journal Title: Radiocarbon Volume: 印刷中 Issue: 2 Pages: 315-320
  • DOI: 10.1017/rdc.2016.54
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] The AD775 cosmic ray event shown in Beryllium-10 data from Antarctic Dome Fuji ice core (2015)
  • Author(s): F. Miyake, A. Suzuki, K. Masuda, K. Horiuchi, H. Motoyama, H. Matsuzaki, Y. Motizuki, K. Takahashi, Y. Nakai
  • Journal Title: PoS (ICRC2015) Volume: 1 Pages: 110-110
• [Journal Article] Cosmic ray event of AD 774-775 shown in quasi-annual 10Be data from the Antarctic Dome Fuji ice core (2015)
  • Author(s): Fusa Miyake, Asami Suzuki, Kimiaki Masuda, Kazuho Horiuchi, Hideaki Motoyama, Hiroyuki Matsuzaki, Yuko Motizuki, Kazuya Takahashi, Yoichi Nakai
  • Journal Title: Geophysical Researrch Letters Volume: 42 Issue: 1 Pages: 84-89
  • DOI: 10.1002/2014gl062218
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Verification of the cosmic ray event in AD 993-994 by using a Japanese Hinoki tree (2014)
  • Author(s): F. Miyake, K. Masuda, M. Hakozaki, T. Nakamura, F. Tokanai, K. Kato, K. Kimura and T. Mitsutani
  • Journal Title: Radiocarbon Volume: 56 Issue: 3 Pages: 1189-1194
  • DOI: 10.2458/56.17769
  • Peer Reviewed
• [Presentation] 屋久杉年輪中放射性炭素を用いたWolf太陽極小期周辺の宇宙線強度変動 (2017)
  • Author(s): 森千尋，増田公明，三宅芙沙，中村俊夫，木村勝彦，門叶冬樹
  • Organizer: 日本物理学会 第72回年次大会
  • Place of Presentation: 大阪大学
  • Year and Date: 2017-03-17
• [Presentation] 屋久杉年輪中放射性炭素を用いた14世紀の宇宙線強度変動の研究 (2016)
  • Author(s): 森千尋，増田公明，三宅芙沙，中村俊夫，木村勝彦
  • Organizer: 日本物理学会 2016 年秋季大会
  • Place of Presentation: 宮崎大学
  • Year and Date: 2016-09-21
• [Presentation] 宇宙線による雲凝結核生成について複数線源での検証実験(6) (2016)
  • Author(s): 鈴木麻未，増田公明，伊藤好孝，さこ隆志，松見豊，中山智喜，上田紗也子三浦和彦，草野完也
  • Organizer: 日本物理学会 2016 年秋季大会
  • Place of Presentation: 宮崎大学
  • Year and Date: 2016-09-21
• [Presentation] Large 14C excursion in the BC 55th century (2016)
  • Author(s): F. Miyake, K. Masuda, T. Nakamura, A. J. T. Jull, I. P. Panyushkina and L. Wacker
  • Organizer: GoldSchmidt conference 2016
  • Place of Presentation: Yokohama, Japan
  • Year and Date: 2016-06-28
  • Int'l Joint Research
• [Presentation] Annual cosmic ray events shown in 14C data of tree-rings (2016)
  • Author(s): F. Miyake, K. Masuda et al.
  • Organizer: VarSITI 2016
  • Place of Presentation: Albena, Bulgaria
  • Year and Date: 2016-06-06
  • Int'l Joint Research
• [Presentation] 二次宇宙線の種類に着目したエアロゾル核生成の検証実験 (2016)
  • Author(s): 鈴木麻未，増田公明，伊藤好孝，さこ隆志，松見豊，中山智喜，上田紗也子三浦和彦，草野完也
  • Organizer: 日本地球惑星科学連合2016年大会
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2016-05-22
• [Presentation] 鳥海神代杉年輪のC14増加現象 (2016)
  • Author(s): 櫻井敬久，門叶冬樹，森谷透，三宅芙沙，増田公明，堀内一穂，坂本稔
  • Organizer: 日本物理学会 第71回年次大会
  • Place of Presentation: 仙台
  • Year and Date: 2016-03-19
• [Presentation] BC55世紀の年輪中14C濃度大増加の痕跡 (2016)
  • Author(s): 三宅芙沙，増田公明，中村俊夫，A. J. T. Jull, I. P. Panyushkina
  • Organizer: 日本物理学会 第71回年次大会
  • Place of Presentation: 仙台
  • Year and Date: 2016-03-19
• [Presentation] Search for annual carbon-14 excursions in the past (2015)
  • Author(s): F. Miyake, K. Masuda, T. Nakamura, K. Kimura, M. Hakozaki, A.J.T. Jull, T.E. Lange, R. Cruz, I.P. Panyushkina, C. Baisan, M.W. Salzer
  • Organizer: 22nd Intern. Radiocarbon Conf.
  • Place of Presentation: Dakar, Senegal
  • Year and Date: 2015-11-16
  • Int'l Joint Research
• [Presentation] 宇宙線による雲凝結核生成促進について複数線源での検証実験(5) (2015)
  • Author(s): 鈴木麻未，増田公明，﨏隆志，伊藤好孝，松見豊，中山智喜，上田紗也子，三浦和彦，草野完也
  • Organizer: 日本物理学会 2015年秋季大会
  • Place of Presentation: 大阪
  • Year and Date: 2015-09-25
• [Presentation] 北米樹木サンプルを利用した過去5000年間の宇宙線イベント探索 (2015)
  • Author(s): 三宅芙沙，増田公明，A. J. T. Jull, I. P. Panyushkina
  • Organizer: 日本物理学会 2015年秋季大会
  • Place of Presentation: 大阪
  • Year and Date: 2015-09-25
• [Presentation] The AD775 cosmic ray event shown in Beryllium-10 data from Antarctic Dome Fuji ice core (2015)
  • Author(s): F. Miyake, A. Suzuki, K. Masuda, K. Horiuchi, H. Motoyama, H. Matsuzaki, Y. Motizuki, K. Takahashi, Y. Nakai
  • Organizer: 34th Intern. Cosmic Ray Conf.
  • Place of Presentation: Hague, Netherlands
  • Year and Date: 2015-07-30
  • Int'l Joint Research
• [Presentation] 宇宙線による雲凝結核生成について複数線源での検証実験(4) (2015)
  • Author(s): 鈴木麻未，増田公明，竹内雄也，﨏隆志，伊藤好孝，松見豊，中山智喜，上田紗也子，三浦和彦，草野完也
  • Organizer: 日本物理学会第70回年次大会
  • Place of Presentation: 早稲田大学，東京
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] Verification of difference of ion-induced nucleation rate for kinds of ionizing radiation (2014)
  • Author(s): A. Suzuki1, K. Masuda, Y. Takeuchi, Y. Itow, T. Sako, Y. Matsumi, T. Nakayama, S. Ueda, K. Miura and K. Kusano
  • Organizer: 2014 AGU Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2014-12-15 – 2014-12-19
• [Presentation] A searching of past large Solar Proton Event by measuring carbon-14 content in tree-rings (2014)
  • Author(s): F. Miyake, K. Masuda, M. Hakozaki, T. Nakamura and K. Kimura
  • Organizer: 2014 AGU Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2014-12-15 – 2014-12-19
• [Presentation] 宇宙線による雲凝結核生成について複数線源での検証実験(2) (2014)
  • Author(s): 鈴木麻未，増田公明，竹内雄也，﨏隆志，伊藤好孝，松見豊，中山智喜，上田紗也子，三浦和彦，草野完也
  • Organizer: 日本物理学会2014年秋季大会
  • Place of Presentation: 佐賀大学，佐賀
  • Year and Date: 2014-09-18 – 2014-09-21
• [Presentation] 宇宙線による雲凝結核生成について複数線源での検証実験(3) (2014)
  • Author(s): 竹内雄也，鈴木麻未，増田公明，﨏隆志，伊藤好孝，松見豊，中山智喜，上田紗也子，三浦和彦，草野完也
  • Organizer: 日本物理学会2014年秋季大会
  • Place of Presentation: 佐賀大学，佐賀
  • Year and Date: 2014-09-18 – 2014-09-21
• [Presentation] 南極アイスコア中10Be濃度を用いた西暦774-775年宇宙線イベントの調査 (2014)
  • Author(s): 三宅芙沙，鈴木麻未，増田公明，堀内一穂，本山秀明，松崎浩之，望月優子，高橋和也，中井陽一
  • Organizer: 日本物理学会 2014年秋季大会
  • Place of Presentation: 佐賀大学，佐賀
  • Year and Date: 2014-09-18 – 2014-09-21
• [Presentation] Chamber experiment with radiation sources for verification of sulfuric acid aerosol formation (2014)
  • Author(s): A. Suzuki, K. Masuda, Y. Takeuchi, T. Sako, Y. Itow, Y. Matsumi, T. Nakayama, S. Ueda, K. Miura and K. Kusano
  • Organizer: 2014 International Aerosol Conference
  • Place of Presentation: Busan, Korea
  • Year and Date: 2014-08-28 – 2014-09-02
• [Presentation] Laboratory experiment with various radiation sources for verification of cloud condensation nucleation by cosmic rays (2014)
  • Author(s): A. Suzuki, K. Masuda, Y. Takeuchi, T. Sako, Y. Itow, Y. Matsumi, T. Nakayama, S. Ueda, K. Miura and K. Kusano
  • Organizer: Japan Geoscience Union 2014 Meeting
  • Place of Presentation: Yokohama, Japan
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] Plan of large SPE search by the 14C content measurement in Japanese trees for the past 5000 years (2014)
  • Author(s): F. Miyake, K. Masuda, M. Hakozaki, T. Nakamura and K. Kimura
  • Organizer: Japan Geoscience Union 2014 Meeting
  • Place of Presentation: Yokohama, Japan
  • Year and Date: 2014-04-28 – 2014-05-02