Analysis of decadal to millennial sGale variation of Cosmic Ray intensity recorded in iGe Gore and its impliGation for the earth environment

2012 Fiscal Year Final Research Report

• Project/Area Number: 22241003
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: The University of Tokyo
• Principal Investigator: MATSUZAKI Hiroyuki 東京大学, 大学院・工学系研究科, 准教授 (60313194)
• Co-Investigator(Kenkyū-buntansha): SASA Kimikazu 筑波大学, 大学院・数理物質科学研究科, 准教授 (20312796) ; HORIUCHI Kazuho 弘前大学, 大学院・理工学研究科, 助教 (00344614) ; YOKOYAMA Yusuke 東京大学, 大気海洋研究所, 准教授 (10359648) ; SHIBATA Yasuyuki 国立環境研究所, 化学環境領域, 領域長 (80154251) ; MURAMATSU Yasuyuki 学習院大学, 理学部, 教授 (70166304) ; MOTOYAMA Hideaki 国立極地研究所, 研究教育系, 教授 (20210099) ; KAWAMURA Kenji 国立極地研究所, 研究教育系, 准教授 (90431478)
• Co-Investigator(Renkei-kenkyūsha): SEGAWA Takahi 情報・システム研究機構, 新領域融合研究センター, 融合プロジェクト特任研究員 (90425835) ; MIYAHARA Hiroko 東京大学, 宇宙線研究所, 助教 (00532681) ; TOSAKI Yuki 筑波大学, 大学院・生命環境科学研究科, 助教 (80533215)
• Project Period (FY): 2010 – 2012
• Keywords: 宇宙線イベント / 環境変動 / 古気候 / アイスコア / 加速器質量分析 / 宇宙線生成 / 核種 / ベリリウム / 塩素36

Research Abstract

The records of cosmogenic nuclides in Dome Fuji ice core, covering 720 kyr, wereanalyzed by means of Accelerator Mass Spectrometry. By analyzing several prominentgeomagnetic events, Laschamp, Blake, Iceland Basin, in detail, the records ofcosmogenic nuclides, especially Beryllium-10, were found to be excellent indicator ofthe variation of cosmic ray intensity.

Research Products

• [Journal Article] 10Be measurementsat MALT using reduced-size samples ofbulk sediments. (2013)
  • Author(s): K.Horiuchi, 1. Oniyanagi, H. Wasada,H.Matsuzaki
  • Journal Title: Nuclear Instrumentsand Methods inPhysics Research B Volume: 294 Pages: 72-76
• [Journal Article] Paleoenvironmental changes in thenorthwest Mongolia during the last 27kyr inferred from organic componentsin Lake Hovsgol sediment core record. (2012)
  • Author(s): G.1.Matsumoto, R. Kanou, C. Sato,K.Horiuchi, T. Kawai
  • Journal Title: Limnology Volume: 13 Pages: 55-63.
  • DOI: DOI10.1007/s10201-011-0355-3.
• [Journal Article] multiple-tracer characterisation andmodel intercomparison for NEEM, (2012)
  • Author(s): C.Buizert, P. Martinerie,V.V. Petrenko, J. P. Severinghaus,C.M. Trudinger, E. Witrant, J. L. Rosen,A.J. Orsi, M. Rubino, D. M. Etheridge,L.P. Steele, C. Hogan, J. C. Laube,W.T. Sturges, V. A. Levchenko,A.M. Smith, 1. Levin, T. J. Conway,E.J. Dlugokencky, P. M. Lang,K.Kawamura, T. M. Jenk, J. W. C. White,T.Sowers, J. Schwander, T. Blunier,Gas transport in firn:
  • Journal Title: Northern Greenland, Atmos Chem Phys, Volume: 12 Pages: 4259-4277
  • DOI: DOI10.5194/Acp-12-4259-2012
• [Presentation] The 6 MV tandemacceleratorproject for nuclear physics and ionbeamapPlications at the University ofTsukuba (2012)
  • Author(s): K.Sasa
  • Organizer: The 8th China-Japan Joint NuclearPhysics Symposium (lnvited),
  • Place of Presentation: Beijing, China
  • Year and Date: 20121015-1019
• [Presentation] CIimaticand atmospherichistories over the past 700,000 yearsfromthe Dome Fuji deep ice core,Antarctica (2012)
  • Author(s): K.Kawamura
  • Organizer: G- COE 2012 Symposium
  • Place of Presentation: Sendai, Miyagi,Japan
  • Year and Date: 20120925-0928
• [Presentation] Long-termvariations ofcosmogenic radionuclides recorded in icecores, sediments and tree rings (2012)
  • Author(s): K.Horiuchi
  • Organizer: H24 MALTprogress symposium (lnvited),
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 20120920-0921
• [Presentation] Current status of MALTand future plan for technical developments, (2012)
  • Author(s): H.Matsuzaki
  • Organizer: H24 MALT progress symposium
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 20120920-0921
• [Presentation] Beryllium10 analysisforthe Dome Fuji ice cores and cosmic- raystratigraphy (2012)
  • Author(s): K.Horiuchi
  • Organizer: The lgLh International MassSpectrometry Conference
  • Place of Presentation: Kyoto
  • Year and Date: 20120915-0920
• [Presentation] Accurate age scaleof theDome Fuji ice core (2012)
  • Author(s): K.Kawamura
  • Organizer: Antarctica fromO2/N2ratio of trapPed air, EGU 2012 GeneralAssembly
  • Place of Presentation: Vienna, Austria
  • Year and Date: 20120422-0427
• [Presentation] Accurately dated700,000-year clima2 tic record fromthe DomeFuji ice core (2012)
  • Author(s): K.Kawamura
  • Organizer: Antarctica, InternationalPartnerships in Ice Core Sciences FirstOpen Science Conference
  • Place of Presentation: Presque le de Giens, Cote d'Azur, France
  • Year and Date: 2012-10-15
• [Presentation] Timing of interglacialswith respect to precession and obliquity, (2012)
  • Author(s): K.Kawamura
  • Organizer: 4th PIGS WorkshoP (invited)
  • Place of Presentation: Cambridge, UK
  • Year and Date: 2012-07-25
• [Presentation] 多核種AMSの研究展望(招待講演) (2012)
  • Author(s): 松崎浩之
  • Organizer: 「筑波大学複合タンデム加速器施設の新展開一タンデム加速器更新計画と今後の研究展望一」プレ戦略研究成果報告会,
  • Place of Presentation: 筑波大学
  • Year and Date: 2012-03-29
• [Presentation] Status report of MALTAccelerator Facility, The University ofTokyo (2011)
  • Author(s): H.Matsuzaki
  • Organizer: The 4th East Asia Accelerator MassSPectrometry Symposium
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 20111216-1217
• [Presentation] New AMS project at theUniversity of Tsukuba (2011)
  • Author(s): K.Sasa
  • Organizer: The 4th East AsiaAccelerator Mass Spectrometry Symposium,
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 20111216-1217
• [Presentation] Cosmogenic Be-10 analysisduring the Laschamp geomagnetic excursionin the Dome Fuji ice core3Antarctica (2011)
  • Author(s): T.Aze
  • Organizer: The4th East AsiaAccelerator Mass SpectrometrySymposium
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 20111216-1217
• [Presentation] Blake geomagneticexcursion recorded as loBe and 26Al fluxanomaly in the Dome Fuji ice core (2011)
  • Author(s): Y.Yokoyama
  • Organizer: The 4th East Asia Accelerator Mass SpectrometrySymposium
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 20111216-1217
• [Presentation] A 300-kyr loBe record fromDome Fuji (Antarctica) and cosmic-raystratigraphy (2011)
  • Author(s): K.Horiuchi
  • Organizer: The 4Lh East AsiaAcceleratorMass Spectrometry Symposium,
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 20111216-1217
• [Presentation] Summary of current AMSsystem and research projects at MALT (2011)
  • Author(s): H.Matsuzaki
  • Organizer: TheUniversity of Tokyo, The 12th International Conference on Accelerator MassSpectrometry, 2
  • Place of Presentation: Wellington,New Zealand.
  • Year and Date: 20110320-0325
• [Presentation] 36Cl profiles in the Dome Fujiice core during the last deglaciation, (2011)
  • Author(s): K.Sasa
  • Place of Presentation: Wellington, New Zealand.
  • Year and Date: 20110320-0325
• [Presentation] loBe analysis at the 8.2kaevent from dome Fuji ice core (2011)
  • Author(s): 河原圭佑
  • Organizer: 第13回AMSシンポジウム
  • Place of Presentation: 山形県山形市
  • Year and Date: 2011-01-29
• [Presentation] ドームふじアイスコア第三期AMS研究計画 (2010)
  • Author(s): 堀内一穂
  • Organizer: 第12回AMSシンポジウム,
  • Place of Presentation: 群馬県桐生市
  • Year and Date: 2010-05-24