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Global estimates of heat and salt/freshwater flux associated with sea-ice freezing and melting

Research Project

Project/Area Number 17K00530
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Environmental dynamic analysis
Research InstitutionTomakomai National College of Technology

Principal Investigator

Nihashi Sohey  苫小牧工業高等専門学校, 創造工学科, 教授 (50396321)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords熱・塩・淡水フラックス / 海氷 / 海氷生産 / 海氷融解 / 高密度水生成 / 塩分フラックス / 淡水フラックス / 極域 / 沿岸ポリニヤ / 南極海 / 北極海
Outline of Final Research Achievements

The dataset is based on a heat budget analysis using ice concentration, thickness, and drift speed from satellite observations and the ERA-Interim data. The salt flux calculation considers both salt supplied to the ocean from sea-ice production and freshwater supplied when the ice melts. This dataset will be useful for the validation and boundary conditions of modeling studies. The spatial distribution of the annual fluxes shows a distinct contrast between south and north (higher and lower latitude regions): significant ocean cooling with salt supply is shown in the southern coastal polynya region, while ocean heating with freshwater supply is shown in the north region. This contrast suggests a transport of freshwater and negative heat by ice advection. The annual fluxes also show ocean cooling with freshwater supply in some coastal regions, suggesting the effect of warm water advection.

Academic Significance and Societal Importance of the Research Achievements

作成したデータセットから示される海氷による熱と塩/淡水の再分配と輸送は、気候システムや、物質循環や生物活動といった様々な観点からも重要である。例えば西南極や東南極の一部の岸近くの海域では、大気から海洋には熱の供給がないのに淡水供給すなわち海氷融解が示された。これは海洋下層や水平方向からの比較的温かい海水が移流し海氷が融解していることを示唆するものである。このことは海洋―氷床結合系を理解する上でも重要であり、作成したデータセットが、地球温暖化に伴う氷床の融解やこれによる海面上昇を理解する上で鍵となる情報を提供できるものであることを示している。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (27 results)

All 2019 2018 2017

All Journal Article (9 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 8 results,  Open Access: 4 results) Presentation (18 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Landfast ice controls on sea-ice production in the Cape Darnley Polynya: A case study2019

    • Author(s)
      Fraser A. D., Ohshima K. I., Nihashi S., Massom R. A., Tamura T., Nakata K., Williams G. D.
    • Journal Title

      Remote Sensing of Environment

      Volume: 233 Pages: 111315-111315

    • DOI

      10.1016/j.rse.2019.111315

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Evaluation of AMSR-E Thin Ice Thickness Algorithm from a Mooring-Based Observation: How Can the Satellite Observe a Sea Ice Field with Nonuniform Thickness Distribution?2019

    • Author(s)
      Kashiwase H., Ohshima K. I., Fukamachi Y., Nihashi S., Tamura T.
    • Journal Title

      Journal of Atmospheric and Oceanic Technology

      Volume: 36 Issue: 8 Pages: 1623-1641

    • DOI

      10.1175/jtech-d-18-0218.1

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The Relationship between phytoplankton bloom and sea ice melt in the Sea of Okhotsk, revealed from the profiling floats2019

    • Author(s)
      Kishi, S., K. I. Ohshima, N. Isshiki, S. Nihashi, and S. C. Riser
    • Journal Title

      Proceedings of the 34th International Symposium on the Okhotsk Sea & Polar Oceans 2019

      Volume: 34 Pages: 363-366

    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Journal Article] Estimation of Thin-Ice Thickness and Discrimination of Ice Type From AMSR-E Passive Microwave Data2019

    • Author(s)
      Nakata Kazuki、Ohshima Kay I.、Nihashi Sohey
    • Journal Title

      IEEE Transactions on Geoscience and Remote Sensing

      Volume: 57 Issue: 1 Pages: 263-276

    • DOI

      10.1109/tgrs.2018.2853590

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Estimation of sea-ice thickness and volume in the Sea of Okhotsk based on ICESat data2018

    • Author(s)
      Nihashi, S., N. T. Kurtz, T. Markus, K. I. Ohshima, K. Tateyama, T. Toyota
    • Journal Title

      Annals of Glaciology

      Volume: - Issue: 76pt2 Pages: 1-11

    • DOI

      10.1017/aog.2018.8

    • NAID

      120006528262

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Sea-ice production in the northern Japan Sea2017

    • Author(s)
      Nihashi Sohey、Ohshima Kay I.、Saitoh Sei-Ichi
    • Journal Title

      Deep Sea Research Part I

      Volume: 127 Pages: 65-76

    • DOI

      10.1016/j.dsr.2017.08.003

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Sea-Ice Production in Antarctic Coastal Polynyas Estimated From AMSR2 Data and Its Validation Using AMSR-E and SSM/I-SSMIS Data2017

    • Author(s)
      Nihashi Sohey、Ohshima Kay I.、Tamura Takeshi
    • Journal Title

      IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing

      Volume: 10(9) Issue: 9 Pages: 3912-3922

    • DOI

      10.1109/jstars.2017.2731995

    • NAID

      120006367987

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Sea-ice thickness in the coastal northeastern Chukchi Sea from moored ice-profiling sonar2017

    • Author(s)
      FUKAMACHI YASUSHI、SIMIZU DAISUKE、OHSHIMA KAY I.、EICKEN HAJO、MAHONEY ANDREW R.、IWAMOTO KATSUSHI、MORIYA ERIKA、NIHASHI SOHEY
    • Journal Title

      Journal of Glaciology

      Volume: 63 Issue: 241 Pages: 888-898

    • DOI

      10.1017/jog.2017.56

    • NAID

      120006382308

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone2017

    • Author(s)
      Kashiwase Haruhiko、Ohshima Kay I.、Nihashi Sohey、Eicken Hajo
    • Journal Title

      Scientific Reports

      Volume: 7 Issue: 1 Pages: 1-10

    • DOI

      10.1038/s41598-017-08467-z

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] サハリン沖係留観測に基づく高精度なAMSR-E薄氷厚アルゴリズムの開発2019

    • Author(s)
      柏瀬陽彦, 大島慶一郎, 深町康, 二橋創平, 田村岳史
    • Organizer
      日本海洋学会2019年度秋季大会,富山市 2019年9月28日
    • Related Report
      2019 Annual Research Report
  • [Presentation] 酸素センサー付フロートからわかるオホーツク海での海氷融解と春季ブルームの関係2019

    • Author(s)
      岸紗智子, 大島慶一郎, 一色倫聡, 二橋創平, Stephen C. Riser
    • Organizer
      日本海洋学会2019年度秋季大会,富山市 2019年9月28日
    • Related Report
      2019 Annual Research Report
  • [Presentation] ベーリング海における海氷生産量の見積もり:アナディールポリニヤに着目して2019

    • Author(s)
      大島慶一郎, 田丸直也, 柏瀬陽彦, 二橋創平, 中田和輝, 岩本勉之
    • Organizer
      日本海洋学会2019年度秋季大会,富山市 2019年9月28日
    • Related Report
      2019 Annual Research Report
  • [Presentation] Estimation of sea-ice production in the Bering Sea from AMSR-E and AMSR2 data, with special emphasis on the Anadyr polynya2019

    • Author(s)
      Kay I. Ohshima, Naoya Tamaru, Sohey Nihashi, Kazuki Nakata, Katsushi Iwamoto
    • Organizer
      IGS 2019 sea ice symposium, Winnipeg, Canada 2019年8月22日
    • Related Report
      2019 Annual Research Report
  • [Presentation] Sea-ice thickness and volume in the Sea of Okhotsk estimated on the basis of ICESat and CryoSat-2 data2019

    • Author(s)
      Sohey Nihashi, Nathan Kurtz, Takenobu Toyota
    • Organizer
      IGS 2019 sea ice symposium, Winnipeg, Canada 2019年8月19日
    • Related Report
      2019 Annual Research Report
  • [Presentation] Ice thickness and volume in the Sea of Okhotsk estimated using ICESat and CryoSat-2 data2019

    • Author(s)
      Sohey Nihashi, Nathan T. Kurtz, Takenobu Toyota
    • Organizer
      27th IUGG General Assembly, Montreal, Canada 2019年7月12日
    • Related Report
      2019 Annual Research Report
  • [Presentation] Estimation of ice thickness and volume in the Sea of Okhotsk using ICESat and CryoSat-2 data2019

    • Author(s)
      Sohey Nihashi, Nathan Kurtz, Takenobu Toyota
    • Organizer
      JpGU Meeting 2019, Chiba, Japan 2019年5月30日
    • Related Report
      2019 Annual Research Report
  • [Presentation] Estimation of thin ice thickness and discrimination of ice type from AMSR2 passive microwave data2019

    • Author(s)
      Kazuki Nakata, Naoya Tamaru, Sohey Nihashi, Kay I. Ohshima
    • Organizer
      JpGU Meeting 2019, Chiba, Japan 2019年5月27日
    • Related Report
      2019 Annual Research Report
  • [Presentation] Mechanism of sea-ice production variation in Amundsen Sea Polynya2019

    • Author(s)
      Sohey Nihashi, Kohta Mine, Kazuki Nakata
    • Organizer
      JpGU Meeting 2019, Chiba, Japan 2019年5月27日
    • Related Report
      2019 Annual Research Report
  • [Presentation] The relationship between phytoplankton bloom and sea ice melt in the Sea of Okhotsk, revealed from the profiling floats2019

    • Author(s)
      Kishi, S., K. I. Ohshima, N. Isshiki, S. Nihashi, and S. Riser
    • Organizer
      The 34th International Symposium on the Okhotsk Sea & Polar Oceans, Mombetsu, Japan
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Sea-ice production in Antarctic coastal polynyas estimated using AMSR-E and AMSR2 data2018

    • Author(s)
      Nihashi, S., K. I. Ohshima, and T. Tamura
    • Organizer
      AOGS 15th Annual Meeting 2018, Hawaii, USA
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Sea-Ice Thickness and Volume in the Sea of Okhotsk Revealed from ICESat Data2018

    • Author(s)
      Nihashi, S., N. Kurtz, T. Markus, K. I. Ohshima, K. Tateyama, and T. Toyota
    • Organizer
      AOGS 15th Annual Meeting 2018, Hawaii, USA
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Variability of sea-ice thickness in the northeastern coastal Chukchi Sea revealed by a moored ice-profiling sonar2017

    • Author(s)
      Y. Fukamachi, D. Simizu, K.I Ohshima, H. Eicken, A. Mahoney, K. Iwamoto, E. Moriya, and S. Nihashi
    • Organizer
      JpGU-AGU Joint Meeting 2017
    • Related Report
      2017 Research-status Report
  • [Presentation] Variability of Antarctic coastal polynyas and their linkage with fast ice revealed from AMSR-E and AMSR2 data2017

    • Author(s)
      S. Nihashi, K.I. Ohshima, and T. Tamura
    • Organizer
      JpGU-AGU Joint Meeting 2017
    • Related Report
      2017 Research-status Report
  • [Presentation] Circumpolar mapping of the Antarctic coastal polynyas with discrimination of ice type2017

    • Author(s)
      K. Nakata, K.I. Ohshima, and S. Nihashi
    • Organizer
      JpGU-AGU Joint Meeting 2017
    • Related Report
      2017 Research-status Report
  • [Presentation] Sea-ice thickness and volume in the Sea of Okhotsk estimated from ICESat data2017

    • Author(s)
      Sohey Nihashi, Nathan T. Kurtz, Thorsten Markus, Kay I. Ohshima, Kazutaka Tateyama, Takenobu Toyota
    • Organizer
      IGS International Symposium on Polar Ice, Polar Climate, Polar Change: Remote sensing advances in understanding the cryosphere, University of Colorado in Boulder, Colorado, USA
    • Related Report
      2017 Research-status Report
  • [Presentation] The Cape Darnley polynya: a case study in landfast sea-ice-coastal polynya interaction2017

    • Author(s)
      Alexander Fraser, Kay Ohshima, Sohey Nihashi, Takeshi Tamura, Kazuki Nakata, Guy Williams, Rob Massom, Scott Carpentier, Sascha Willmes
    • Organizer
      IGS International Symposium on Polar Ice, Polar Climate, Polar Change: Remote sensing advances in understanding the cryosphere, University of Colorado in Boulder, Colorado, USA
    • Related Report
      2017 Research-status Report
  • [Presentation] Sea-ice production in Antarctic coastal polynyas estimated from AMSR2 data and its comparison with AMSR-E and SSM/I-SSMIS data2017

    • Author(s)
      Sohey Nihashi, Kay I. Ohshima, Takeshi Tamura
    • Organizer
      IGS International Symposium on Polar Ice, Polar Climate, Polar Change: Remote sensing advances in understanding the cryosphere, University of Colorado in Boulder, Colorado, USA
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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