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Presumption of turbulent kinetic energy in the Arctic Ocean: Evaluation of ice retreat and growing large-scale ocean circulation

Research Project

Project/Area Number 16K21700
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Meteorology/Physical oceanography/Hydrology
Environmental dynamic analysis
Research InstitutionThe University of Tokyo (2017-2018)
Japan Agency for Marine-Earth Science and Technology (2016)

Principal Investigator

Kawaguchi Yusuke  東京大学, 大気海洋研究所, 助教 (00554114)

Research Collaborator NISHINO Shigeto  
FUJIWARA Amane  
ITOH Motoyo  
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: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords北極海 / 慣性振動 / 内部重力波 / 海水 / 乱流混合 / エネルギー散逸 / ウェーブレット / 海氷 / 北極海・チャクチ海台 / 近慣性内部重力波 / エネルギーカスケード / 渦ー波ー乱流の相互作用効果 / 海氷減少 / 地球温暖化 / 海洋物理 / 海洋乱流 / 気候変動
Outline of Final Research Achievements

In this study, we performed mooring and shipboard observations to elucidate the variation of sea ice volume and ocean mixing in the Arctic Ocean. We closely analyzed the data records from the mooring system, that was situated in the Pacific section of the Arctic, where ice retreat has been observed in the most prominent way. The data demonstrated the remarkable elevation in internal wave and turbulent kinetic energy in the upper water. We interpret that the high energy level is due to the expansion in the momentum exchange between ice and air. The increased turbulent energy was observed particularly during early summer and early freezing period, when sea ice was rarely present. In the time, ice drift is relatively faster as response to the surface wind. Consequently, we concluded that the faster ice drift produced highly energetic internal waves in the upper part of ocean column, at the similar frequency.

Academic Significance and Societal Importance of the Research Achievements

上述のように、地球温暖化の影響で海氷が著しく減少し続ける北極海において、海洋が大気に接する時間が増加することは自明である。変化が著しい北極海において、海洋がこの変化にどのように応答しているのか?と言う問いに対して、係留系を用いた直接的な海氷や海洋流速の現場観測を執り行い、通年におよぶ貴重な実測データを取得した。その詳細なデータ解析から、北極海の海洋では、地球温暖化に端を発した海氷減少の影響がすでに中・深層にまでおよび始めていることを提示できた点は、学術コミュニティのみならず社会全体に与える影響力は決して小さくないと考える。

Report

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

    (34 results)

All 2018 2017 2016 Other

All Int'l Joint Research (3 results) Journal Article (9 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results,  Open Access: 5 results,  Acknowledgement Compliant: 3 results) Presentation (22 results) (of which Int'l Joint Research: 16 results,  Invited: 1 results)

  • [Int'l Joint Research] Alfred Wegener Institution(ドイツ)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] ワシントン大学(米国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] インハ大学/韓国極地研究所(KOPRI)(韓国)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Year-round observations of sea-ice drift and near-inertial internal waves in the Northwind Abyssal Plain, Arctic Ocean2018

    • Author(s)
      Kawaguchi, Y., M. Itoh, Y. Fukamachi, E. Moriya, J. Onodera, T. Kikuchi and N. Harada
    • Journal Title

      Polar Science

      Volume: in press Pages: 1-9

    • DOI

      10.1016/j.polar.2019.01.004

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Biogeochemical anatomy of a cyclonic warm-core eddy in the Arctic Ocean2018

    • Author(s)
      Nishino, S., Kawaguchi, Y., Fujiwara, A., Shiozaki, T., Aoyama, M., Harada, N., & Kikuchi, T.
    • Journal Title

      Geophysical Research Letters

      Volume: 45 Issue: 20 Pages: 1-9

    • DOI

      10.1029/2018gl079659

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Near-inertial internal waves and related mixing in the Arctic anticyclonic eddies2017

    • Author(s)
      Eun Yae Son, Yusuke Kawaguchi, Ho-Kyung Ha, Jae-hun Park
    • Journal Title

      Proceedings of the 32nd International Symposium on Okhotsk Sea & Sea Ice

      Volume: 1

    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Journal Article] Quantification of the turbulent mixing and associated diapycnal heat transfer2017

    • Author(s)
      Hiroki Takeda, Yusuke Kawaguchi, Jun Inoue, Shigeto Nishino, Michael Steele, Katsuhisa Maeno, Kristina Colburn, Naoki Sato
    • Journal Title

      Proceedings of the 32nd International Symposium on Okhotsk Sea & Sea Ice

      Volume: -

    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Journal Article] Enhanced diapycnal mixing due to near-inertial internal waves propagating through an anticyclonic eddy in the ice-free Chukchi Plateau2016

    • Author(s)
      Yusuke Kawaguchi, Shigeto Nishino, Hiroki Takeda, Inoue Jun, Maeno Katsuhisa, Kazuhiro Oshima
    • Journal Title

      Journal of Physical Oceanography

      Volume: 46 Issue: 8 Pages: 2457-2481

    • DOI

      10.1175/jpo-d-15-0150.1

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Sea-ice melt onset associated with lead opening during the spring/summer transition near the North Pole2016

    • Author(s)
      Vivier Frederic, Hutchings Jennifer, Yusuke Kawaguchi, Kikuchi Takashi, James Morison,Noguchi Tomohide, Lourenco Antonio
    • Journal Title

      Journal of Geophysical Research Oceans

      Volume: 121 Issue: 4 Pages: 2499-2522

    • DOI

      10.1002/2015jc011588

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Coupled response of bacterial production to wind-induced fall phytoplankton bloom and sediment resuspension in the Chukchi sea shelf, western arctic ocean2016

    • Author(s)
      Mario Uchimiya, Chiaki Motegi, Shigeto Nishino, Yusuke Kawaguchi, Jun Inoue, Hiroshi Ogawa, Toshi Nagata
    • Journal Title

      Frontiers in Marine Science

      Volume: 3 Pages: 231-231

    • DOI

      10.3389/fmars.2016.00231

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Enhanced turbulent energy dissipation due to internal wave breaking within an anticyclonic Arctic eddy2016

    • Author(s)
      Yusuke Kawaguchi, Hiroki Takeda, Jun Inoue, Shigeto Nishino, Katsuhiro Maeno
    • Journal Title

      Proceedings of the 31st international symposium on Okhotsk Sea & Sea ice

      Volume: 1 Pages: 128-130

    • Related Report
      2016 Research-status Report
  • [Journal Article] Turbulent mixing within the mixed layer from direct microstructure measurements during Arctic cruise MR14-052016

    • Author(s)
      Hiroki Takeda, Yusuke Kawaguchi, Naoki Sato
    • Journal Title

      Proceedings of the 31st international symposium on Okhotsk Sea & Sea Ice

      Volume: 1 Pages: 138-141

    • Related Report
      2016 Research-status Report
  • [Presentation] Seasonal variability of near-inertial internal waves in the Northwind Abyssal Plain, Arctic Ocean2018

    • Author(s)
      川口悠介
    • Organizer
      Fifth International Symposium on Arctic Research (ISAR-5)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Role of anticyclonic eddies in vertical mixing in Canada Basin, Arctic2017

    • Author(s)
      Eun Yae Son, Yusuke Kawaguchi, Jae-hun Park, Ho-Kyung Ha
    • Organizer
      Port and Ocean Engineering under Arctic Conditions (POAC) '17
    • Place of Presentation
      韓国、釜山
    • Year and Date
      2017-06-11
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Seasonal variability of near-inertial internal waves and its kinetic energy in the ice-diminishing Arctic Ocean2017

    • Author(s)
      Yusuke Kawaguchi
    • Organizer
      JpGU-AGU Joint Meeting 2017
    • Place of Presentation
      千葉県千葉市、幕張メッセ
    • Year and Date
      2017-05-27
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Enhanced diapycnal mixing due to near-inertial internal waves propagating through an anticyclonic eddy in the ice-free Chukchi Plateau2017

    • Author(s)
      Yusuke Kawaguchi
    • Organizer
      European Geosciences Union (EGU) 2017 general assembly
    • Place of Presentation
      オーストリア、ウィーン
    • Year and Date
      2017-04-27
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Mixing and Vertical Heat Transfer in the Surface Mixed Layer of the Arctic Ocean: Implication of a Cross-Pycnocline High-Temperature Anomaly2017

    • Author(s)
      Yusuke Kawaguchi and Hiroki Takeda
    • Organizer
      European Geosciences Union (EGU) 2017 general assembly
    • Place of Presentation
      オーストリア、ウィーン
    • Year and Date
      2017-04-27
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Double-diffusion and energetic internal waves observed in Arctic Ocean vortices2017

    • Author(s)
      Yusuke Kawaguchi
    • Organizer
      OMIX国際シンポジウム
    • Place of Presentation
      東京都文京区、東京大学
    • Year and Date
      2017-03-17
    • Related Report
      2016 Research-status Report
  • [Presentation] 北極海の海氷消失が及ぼす北極海の乱流化現象について2017

    • Author(s)
      川口悠介、伊東素代、菊地隆、小野寺丈直太朗, 原田直美
    • Organizer
      ブルーアース2017
    • Place of Presentation
      東京都千代田区、日本大学理工学部 駿河台キャンパス
    • Year and Date
      2017-03-02
    • Related Report
      2016 Research-status Report
  • [Presentation] 北極海バロー沖の低気圧性渦における二重拡散多重貫入構造2017

    • Author(s)
      川口悠介,西野茂人、藤原周、竹田大樹
    • Organizer
      ブルーアース2017
    • Place of Presentation
      東京都千代田区、日本大学理工学部 駿河台キャンパス
    • Year and Date
      2017-03-02
    • Related Report
      2016 Research-status Report
  • [Presentation] 西部北極海における高気圧渦・乱流混合の相互作用についての研究2017

    • Author(s)
      Eun Yae Son, Yusuke Kawaguchi, Jae Hun Park, Ho Kyung Ha
    • Organizer
      The 32nd International symposium on Sea of Okhotsk and Sea Ice
    • Place of Presentation
      北海道紋別市、紋別市文化会館
    • Year and Date
      2017-02-20
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 太平洋側北極海における海洋混合層の乱流混合と鉛直熱輸送の定量的評価2017

    • Author(s)
      Hiroki Takeda、 Yusuke Kawaguchi、 Jun Inoue、 Shigeto Nishino、 Sato Naoki、 Katsuhisa Maeno, Michael Steel,Kristina Colburn
    • Organizer
      The 32nd international symposium on Sea of Okhotsk & Sea Ice
    • Place of Presentation
      北海道紋別市、紋別市文化会館
    • Year and Date
      2017-02-20
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Observational Study of the eddy-wave-turbulence interaction in the Arctic Ocean2017

    • Author(s)
      川口悠介
    • Organizer
      インハ大学極域海洋研究集会
    • Place of Presentation
      韓国、仁川
    • Year and Date
      2017-02-05
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Enhanced diapycnal mixing due to near-inertial internal waves propagating through an anticyclonic eddy in the ice-free Chukchi Plateau2016

    • Author(s)
      Yusuke Kawaguchi, Shigeto Nishino, Jun Inoue, Hiroki Takeda, Katsuhisa Maeno, Kazuhiro Oshima
    • Organizer
      American Geophysical Union (AGU) fall meeting 2016
    • Place of Presentation
      アメリカ、サンフランシスコ
    • Year and Date
      2016-12-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Enhanced diapycnal mixing due to near-inertial internal waves propagating through an Anticyclonic eddy in the ice-free Chukchi Plateau2016

    • Author(s)
      Yusuke Kawaguchi, Jun Inoue, Shigeto Nishino, Katsuhisa Maeno, Hiroki Takeda, Kazuhiro Oshima
    • Organizer
      The seventh symposium on polar science
    • Place of Presentation
      東京都立川市、国立極地研究所
    • Year and Date
      2016-12-01
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Physical oceanography in polar oceans: sea ice dynamics, turbulent mixing, internal waves, and double-diffusion2016

    • Author(s)
      Yusuke Kawaguchi, Hiroyasu Hasumi
    • Organizer
      日本・ノルウェイ共同研究集会 in Bergen
    • Place of Presentation
      ノルウェイ、ベルゲン
    • Year and Date
      2016-12-01
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Enhanced diapycnal mixing due to near-inertial internal waves propagating through an anticlyclonic eddy in the ice-free Chukchi Plateau2016

    • Author(s)
      Yusuke Kawaguchi
    • Organizer
      The Forum for Arctic Ocean Modeling & Observational Synthesis (FAMOS) meeting 2016
    • Place of Presentation
      アメリカウッズホール、ウッズホール海洋研究所
    • Year and Date
      2016-11-03
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Turbulent mixing and heat balance within the surface mixed layer in the Pacific-side Arctic Ocean2016

    • Author(s)
      Hiroki Takeda、 Yusuke Kawaguchi、 Jun Inoue、 Shigeto Nishino、 Sato Naoki、 Katsuhisa Maeno, Michael Steel,Kristina Colburn
    • Organizer
      The Forum for Arctic Ocean Modeling & Observational Synthesis (FAMOS) meeting 2016
    • Place of Presentation
      アメリカウッズホール、ウッズホール海洋研究所
    • Year and Date
      2016-11-03
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Monitoring of in situ phytoplankton community structure using multi-excitation chlorophyll fluorometer2016

    • Author(s)
      Amane Fujiwara, Shigeto Nishino, Kohei Matsuno, Jonaotaro Onodera, Yusuke Kawaguchi, Toru Hirawake, Koji Suzuki, Jun Inoue, Takashi Kikuchi
    • Organizer
      Ocean Optics Conference 2016
    • Place of Presentation
      カナダ、ビクトリア
    • Year and Date
      2016-10-27
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 北極海バロー沖の低気圧性暖水渦における二重拡散型多重貫入層2016

    • Author(s)
      川口悠介、西野茂人、藤原周、竹田大樹、伊東素代、奥村慎也、徳長航
    • Organizer
      2016年度日本海洋学会秋季大会
    • Place of Presentation
      鹿児島県鹿児島市、鹿児島大学
    • Year and Date
      2016-09-11
    • Related Report
      2016 Research-status Report
  • [Presentation] 西部北極海の高気圧渦に補足された近慣性内部重力波の破砕II2016

    • Author(s)
      川口悠介、西野茂人、猪上淳、竹田大樹、前野克尚、大島和裕
    • Organizer
      2016年度日本海洋学会秋季大会
    • Place of Presentation
      鹿児島県鹿児島市、鹿児島大学
    • Year and Date
      2016-09-11
    • Related Report
      2016 Research-status Report
  • [Presentation] 北極海の表層混合層における乱流混合の定量化 ―鉛直熱輸送により形成された混合層直下の水温極大2016

    • Author(s)
      竹田大樹、川口悠介、猪上淳、西野茂人、前野克尚、佐藤尚毅
    • Organizer
      2016年度日本海洋学会秋季大会
    • Place of Presentation
      鹿児島県鹿児島市、鹿児島大学
    • Year and Date
      2016-09-11
    • Related Report
      2016 Research-status Report
  • [Presentation] Turbulence and internal waves in the Arctic Ocean2016

    • Author(s)
      Yusuke Kawaguchi
    • Organizer
      日露共同研究集会 in P.P. Shirshov
    • Place of Presentation
      ロシア、モスクワ
    • Year and Date
      2016-08-01
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Enhanced diapycnal mixing due to near-inertial internal waves propagating through an anticlyclonic eddy in the ice-free Chukchi Plateau2016

    • Author(s)
      Yusuke Kawaguchi
    • Organizer
      The 22nd international Symposium on Polar Sciences
    • Place of Presentation
      韓国、仁川 Korea Polar Research Institute
    • Year and Date
      2016-05-10
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2022-02-21  

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