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惑星表層環境ー内部共進化変動モデルの研究開発

Research Project

Project/Area Number 16K05547
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Solid earth and planetary physics
Research InstitutionJapan Agency for Marine-Earth Science and Technology

Principal Investigator

中川 貴司  国立研究開発法人海洋研究開発機構, 数理科学・先端技術研究分野, 主任研究員 (50396941)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Discontinued (Fiscal Year 2018)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords表層環境 / 海洋進化 / プレートテクトニクス / マントル対流 / 気候変動 / 炭素循環 / 水循環 / 地球システム進化 / マントルダイナミクス / マントル脱ガス
Outline of Annual Research Achievements

惑星内部変動モデルから見積もられる火山活動が起因する脱ガスによる温室効果ガスの供給量を用いて、惑星表層環境がどのように反応するか定量的に計算できるモデル開発を行った.惑星表層環境については、太陽からの放射エネルギーと惑星自体からの反射エネルギーのバランスで、表面温度の計算ならびに大気ー海洋中に存在する温室効果ガス(二酸化炭素)の量を計算し、気候状態の変動とプレートテクトニクスの相関関係を明らかにした.その結果、気候状態の変動は、スノーボールから高温環境を頻繁に行き来し、その変動の時間スケールは約3000万年程度であることが判明した.この時間スケールと脱ガス変動(火成活動)で規定されるマントル対流の特徴的時間スケールを比較すると、気候変動と脱ガスの時間スケールにある一致と見いだすことに成功した.つまり、長時間(数十億年)スケールでの、惑星全体における気候変動は、惑星深部のダイナミクスとなんらかの因果関係があることが推定することができる.
また、表層環境維持における海洋の存在が惑星表面のテクトニックな活動にどのような影響を受けるかを、マントル対流モデリングを用いて調べた結果、惑星全体に現在の地球海洋の10倍程度の水が存在することが、現在の地球表層の海洋の量を説明するためには、必要であろうと考えられる結果が得られた.しかし、この結果は、地球深部の水の飽和状態に依存するために、最大値の見積もりであると結論づけられる.しかし、沈み込みに伴って、地球深部(遷移層)に持ち込む水フラックスの実験的な見積もりとモデルによって計算された水フラックスを比べると、同程度のオーダーであり、得られた結果でも十分に地球海洋の進化史を説明できる可能性を示唆している.

Report

(3 results)
  • 2018 Annual Research Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (18 results)

All 2018 2017 2016

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (13 results) (of which Int'l Joint Research: 11 results,  Invited: 4 results) Funded Workshop (1 results)

  • [Journal Article] On the evolution of the water ocean in the plate-mantle system2018

    • Author(s)
      Nakagawa Takashi、Iwamori Hikaru、Yanagi Ryunosuke、Nakao Atsushi
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 5 Issue: 1 Pages: 1-16

    • DOI

      10.1186/s40645-018-0209-2

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] On the numerical modeling of the deep mantle water cycle in global-scale mantle dynamics: The effects of the water solubility limit of lower mantle minerals2017

    • Author(s)
      Nakagawa Takashi
    • Journal Title

      Journal of Earth Science

      Volume: 28 Issue: 4 Pages: 563-577

    • DOI

      10.1007/s12583-017-0755-3

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Long-Term Stability of Plate-Like Behavior Caused by Hydrous Mantle Convection and Water Absorption in the Deep Mantle2017

    • Author(s)
      Nakagawa Takashi; Iwamori Hikaru
    • Journal Title

      Journal of Geophysical Research-Solid Earth

      Volume: 122 Issue: 10 Pages: 8431-8445

    • DOI

      10.1002/2017jb014052

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Global-scale water circulation in the Earth's mantle: Implications for the mantle water budget in the early Earth2017

    • Author(s)
      Nakagawa, T., and M. W. Spigelman
    • Journal Title

      Earth and Planetary Science Letters

      Volume: 464 Pages: 188-199

    • DOI

      10.1016/j.epsl.2017.02.010

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] On the climate and magnetic evolution of Earth-like planets2018

    • Author(s)
      Takashi Nakagawa, Shintaro Kadoya, and Eiichi Tajika
    • Organizer
      Japan Geoscience Union 2018 Meeting
    • Related Report
      2018 Annual Research Report
  • [Presentation] Climate evolution of the Earth-like planets with surface plate motion in a whole Earth system evolution model2018

    • Author(s)
      Takashi Nakagawa, Shintaro Kadoya, and Eiichi Tajika
    • Organizer
      American Geophysical Union 2018 Fall Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Global-scale water-carbon cycle in mantle dynamics and its implication to climate evolution2018

    • Author(s)
      Takashi Nakagawa, Shintaro Kadoya, and Eiichi Tajika
    • Organizer
      International symposium on Study of Earth's deep interior
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Global-scale water-carbon cycle in mantle dynamics and its implication to climate evolution2018

    • Author(s)
      Takashi Nakagawa, Shintaro Kadoya, and Eiichi Tajika
    • Organizer
      Gordon Research Conference on Deep Carbon Sciences
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Global-scale mantle dynamics: Core-mantle thermo-chemical coupling and volatile cycle2017

    • Author(s)
      Nakagawa Takashi; Iwamori Hikaru
    • Organizer
      High Pressure Mineral Physics Seminar 9
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Numerical modeling on water cycle in plate-mantle dynamics system2017

    • Author(s)
      Nakagawa Takashi
    • Organizer
      Chinese Geoscience Union
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] On evolutionary climate tracks in deep mantle volatile cycle computed from numerical mantle convection simulations and its impact on the habitability of Earth-like planets2017

    • Author(s)
      Nakagawa Takashi; Tajika Eiichi; Kadoya Shintaro
    • Organizer
      American Geophysical Union Fall Meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 極限環境物質科学が固体地球システム進化に果たす役割2017

    • Author(s)
      中川貴司
    • Organizer
      第1回ポスト「京」萌芽的課題「基礎科学の挑戦」・「極限マテリアル」合同公開シンポジウム
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Insights from numerical modeling on the global-scale mantle water cycle: evolution of the surface water ocean as a constraint on the plate-mantle-core system2016

    • Author(s)
      Nakagawa, T., and M. W. Spiegelman
    • Organizer
      American Geophysical Union 2016 Fall Meeting
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      2016-12-14
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Numerical modeling of global-scale water cycle in Earth's mantle and its influence to evolution of surface water ocean2016

    • Author(s)
      Nakagawa, T.
    • Organizer
      2016 Internation Conference on the Earth's Deep Interior
    • Place of Presentation
      Wuhan, China
    • Year and Date
      2016-11-06
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] On the mantle water cycle in global-scale plate-mantle dynamics system2016

    • Author(s)
      Nakagawa, T.
    • Organizer
      1st Asia-Pacific workshop on lithosphere and mantle dynamics
    • Place of Presentation
      Taipei, Taiwan
    • Year and Date
      2016-09-23
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Effects on a stability of plate-like behavior in the global mantle water cycle2016

    • Author(s)
      Nakagawa, T., and M. W. Spiegelman
    • Organizer
      15th international symposium on Study of Earth's Deep Interior
    • Place of Presentation
      Nantes, France
    • Year and Date
      2016-07-25
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effects on a stability of plate-like behavior in the global mantle water cycle2016

    • Author(s)
      Nakagawa, T., and M. W. Spiegelman
    • Organizer
      Workshop on the origin and evolution of plate tectonics
    • Place of Presentation
      Ascona, Switzerland
    • Year and Date
      2016-07-18
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Funded Workshop] 2nd Asia-Oceania Workshop on Lithosphere and Mantle Dynamics2018

    • Related Report
      2018 Annual Research Report

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Published: 2016-04-21   Modified: 2019-12-27  

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