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Disosolved iron transport process and its mechanism driven by sea ice formation and melting in polar oceans

Research Project

Project/Area Number 16K21586
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Environmental impact assessment
Environmental dynamic analysis
Research InstitutionFisheries Research and Education Agency (2018)
National Institute of Polar Research (2016-2017)

Principal Investigator

Nakanowatari Takuya  国立研究開発法人水産研究・教育機構, 北海道区水産研究所, 主任研究員 (20400012)

Research Collaborator Mitsudera Humio  
Nakamura Tomoyuki  
Uchimoto Keisuke  
Nishioka Jun  
Watanabe Eiji  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords物質循環モデル / 海氷・海洋結合モデル / 季節・経年変動 / 風成循環 / リン酸塩 / 沿岸親潮 / 潮汐混合 / オホーツク海 / 北太平洋亜寒帯 / 低次生態系モデル / 鉄サイクル / 18.6年周期変動 / 基礎生産量 / 長期変化 / 経年変動 / 沿岸捕捉流 / 海氷 / 親潮 / 生態系モデル / 季節変動 / エクマン輸送 / 混合層 / 物質循環 / モデルシミュレーション / 極域 / 海洋生態系 / 気候変動
Outline of Final Research Achievements

By using an ice-ocean coupled model with an biogeochemical model, the transport process of dissolved iron and its variability in the subarctic North Pacific including the Sea of Okhotsk were investigated. Seasonal to interannual variability of dissolved iron and macro nutrient concentration in the Oyashio and northwestern subarctic North Pacific is controlled by the wind-driven transport from the Okhotsk Sea and the Bering Sea as well as the local transport from the subsurface layer due to winter convection. Such lateral transport process has an essential role on the determination of primary production in the subarctic North Pacific. On the other hand, the impact of sea ice formation and melting process on the primary production is limited to the Sea of Okhotsk.

Academic Significance and Societal Importance of the Research Achievements

これまで、北太平洋亜寒帯域における表層の鉄や栄養塩濃度の変化は、主に冬季の海面冷却による密度不安定による混合によって、下層から輸送されるいわゆる1次元的な枠組みで理解されてきた。本研究では、オホーツク海と北太平洋亜寒帯域の風成循環、及び海氷形成プロセスを考慮した3次元モデルを用いることによって、新たに水平的な栄養塩供給プロセスの重要性を明らかになった。特に、我が国周辺の親潮海域における栄養塩や鉄の輸送において、オホーツク海を起源とした風成循環場やクリル海峡周辺で卓越する潮汐混合による下層から栄養塩供給は、これらの水平的な物質輸送において本質的な役割を担うことが明らかになった。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (21 results)

All 2019 2018 2017 2016 Other

All Int'l Joint Research (1 results) Journal Article (6 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (13 results) (of which Int'l Joint Research: 8 results) Remarks (1 results)

  • [Int'l Joint Research] ナンセン環境リモートセンシング研究センター(ノルウェー)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Seasonal changes of water mass, circulation and dynamic response in the Kuril Basin of the Sea of Okhotsk.2019

    • Author(s)
      Mensah, V., K. I. Ohshima, T, Nakanowatari, S. Riser
    • Journal Title

      Deep-Sea Research Part I

      Volume: 144 Pages: 115-131

    • DOI

      10.1016/j.dsr.2019.01.012

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Medium-range predictability of early summer sea ice thickness distribution in the East Siberian Sea based on the TOPAZ4 ice?ocean data assimilation system2018

    • Author(s)
      Nakanowatari Takuya、Inoue Jun、Sato Kazutoshi、Bertino Laurent、Xie Jiping、Matsueda Mio、Yamagami Akio、Sugimura Takeshi、Yabuki Hironori、Otsuka Natsuhiko
    • Journal Title

      The Cryosphere

      Volume: 12 Issue: 6 Pages: 2005-2020

    • DOI

      10.5194/tc-12-2005-2018

    • NAID

      120006489813

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Low ocean-floor rises regulate subpolar sea surface temperature by forming baroclinic jets2018

    • Author(s)
      Mitsudera H.、Miyama T.、Nishigaki H.、Nakanowatari T.、Nishikawa H.、Nakamura T.、Wagawa T.、Furue R.、Fujii Y.、Ito S.
    • Journal Title

      Nature Communications

      Volume: 9 Issue: 1 Pages: 1-11

    • DOI

      10.1038/s41467-018-03526-z

    • NAID

      120006470992

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Importance of Ekman transport and gyre circulation change on seasonal variation of surface dissolved iron in the western subarctic North Pacific2017

    • Author(s)
      Nakanowatari Takuya、Nakamura Tomohiro、Uchimoto Keisuke、Nishioka Jun、Mitsudera Humio、Wakatsuchi Masaaki
    • Journal Title

      Journal of Geophysical Research

      Volume: 122 Issue: 5 Pages: 4364-4391

    • DOI

      10.1002/2016jc012354

    • NAID

      120006559266

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hydrographic observations by instrumented marine mammals in the Sea of Okhotsk2017

    • Author(s)
      3.Nakanowatari, T., K. I. Ohshima, V. Mensah, Y. Mitani, K. Hattori, M. Kobayashi, F. Roquet, Y. Sakurai, H. Mitsudera, and M. Wakatsuchi
    • Journal Title

      Polar Science

      Volume: 13 Pages: 56-65

    • DOI

      10.1016/j.polar.2017.06.001

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 環オホーツク圏の海洋シミュレーション2017

    • Author(s)
      中村 知裕・三寺 史夫・内本 圭亮・中野渡 拓也
    • Journal Title

      化学工学

      Volume: 81 Pages: 1-5

    • Related Report
      2016 Research-status Report
  • [Presentation] Influence of autumn ocean heat flux on sea ice advance in the Chukchi Sea2019

    • Author(s)
      Nakanowatari Takuya, Inoue Jun, Jinlun Zhang
    • Organizer
      第34回北方圏国際シンポジウム
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Far-reaching effects of sea ice extent in the Sea of Okhotsk on sea-surface turbulent heat flux and their possible influence2019

    • Author(s)
      Nakamura Tomohiro, Takahashi Yusuke, Nakanowatari Takuya
    • Organizer
      第34回北方圏国際シンポジウム
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Seasonal to interannual variations in surface phosphate concentration in Oyashio region: Role of wind-induced coastally trapped currents2018

    • Author(s)
      Nakanowatari Takuya, Nakamura Tomohiro, Mitsudera Humio, Nishioka Jun
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Seasonal variability of water masses transport and its link with the anticyclonic circulation in the Kuril Basin2018

    • Author(s)
      Vigan Mensah, Ohshima I. Kay, Nakanowatari Takuya, Riser Stephen
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] High resolution biogeochemical modelling in the North Pacific2018

    • Author(s)
      Nishikawa Hatsumi, Mitsudera Humio, Yoshinari Hiroshi, Nakanowatari Takuya, Nakamura Tomohiro, Uchimoto Keisuke, Hasumi Hiroyasu
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Seasonal variability of hydrographic properties and of the circulation in the Kuril Basin2018

    • Author(s)
      Vigan MENSAH, Kay. I. OHSHIMA, Takuya NAKANOWATARI, Stephen RISER
    • Organizer
      The 33rd International Symposium on the Okhotsk Sea & Polar Oceans 2018
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Impact of interannual variations of sea ice area in the Sea of Okhotsk on the atmosphere and ocean2018

    • Author(s)
      Yusuke Takahashi, Tomohiro Nakamura, and Takuya Nakanowatari
    • Organizer
      The 33rd International Symposium on the Okhotsk Sea & Polar Oceans 2018
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effects of sedimentary supply on iron distribution in the North Pacific: Sensitivity experiments with a high-resolution model2018

    • Author(s)
      Tomohiro Nakamura, Humio Mitsudera, Hiroshi Yoshinari, Takuya Nakanowatari, Hatsumi Nishikawa, and Keisuke Uchimoto
    • Organizer
      2018 Ocean sciences meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Modeling of iron circulation in the western North Pacific2017

    • Author(s)
      Mitsudera, H., T. Nakanowatari, H. Nishikawa, and T. Nakamura
    • Organizer
      OMIX国際シンポジウム
    • Place of Presentation
      東京大学
    • Year and Date
      2017-03-16
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 北太平洋亜寒帯域における物質循環の高解像度シミュレーション2017

    • Author(s)
      西川はつみ, 三寺史夫, 吉成浩志, 中野渡拓也, 中村知裕, 内本圭亮, 羽角博康
    • Organizer
      2017年度日本海洋学会
    • Related Report
      2017 Research-status Report
  • [Presentation] Decadal variations in quasi-steady jet strength in the subarctic North Pacific2017

    • Author(s)
      Nakanowatari, T., H. Mitsudera, B. Taguchi, and S. Minobe
    • Organizer
      第32回北方圏国際シンポジウム
    • Place of Presentation
      紋別市民会館
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effects of sedimentary supply on iron circulation in the North Pacific based on a high-resolution model2017

    • Author(s)
      Nakamura, T., H. Mitsudera, H. Yoshinari, T. Nakanowatari, H. Nishikawa, and K. Uchimoto
    • Organizer
      第32回北方圏国際シンポジウム
    • Place of Presentation
      紋別市民会館
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 北太平洋亜寒帯フロントに見られる準定常ジェットの10年規模変動2016

    • Author(s)
      中野渡拓也, 三寺史夫, 田口文明, 見延庄士郎
    • Organizer
      日本海洋学会
    • Place of Presentation
      鹿児島大学
    • Related Report
      2016 Research-status Report
  • [Remarks] 海氷・海洋結合データ同化システムを用いた極域海洋における基礎生産の予測可能性研究

    • Related Report
      2018 Annual Research Report

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Published: 2016-04-21   Modified: 2020-03-30  

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