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Basic research for the tsunami prediction system based on sea-surface height observation using ship-mounted GPS

Research Project

Project/Area Number 19K03965
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 17020:Atmospheric and hydrospheric sciences-related
Research InstitutionNational Institute of Polar Research (2022-2023)
The University of Tokyo (2019-2021)

Principal Investigator

Niwa Yoshihiro  国立極地研究所, 国際極域・地球環境研究推進センター, 特任研究員 (40345260)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords津波 / GPS / 船舶観測 / 航空機観測 / 海面高度観測 / 気象津波 / GNSS / 船舶GPS
Outline of Research at the Start

本研究では、新たな津波の観測方法として、船舶設置GPSによって津波に伴う海面高度の変動を捉えることを試みる。特に、発生頻度が低い地震津波の代わりに、九州西岸で冬季から春季に毎年発生する気圧変動に起因する気象津波(あびき)に着目し、九州西岸沖合を航行する民間定期フェリーに高精度GPSを設置して長期連続観測を行う。さらに数値実験を行い、世界各地の津波常襲国の沖合を航行する多数の民間船舶で津波が観測できた場合、地震津波の予測精度がどの程度向上しうるのか調べる。

Outline of Final Research Achievements

In this study, to test offshore ships as a platform for tsunami wave observation, we attempted the sea surface elevation measurement using high-precision GPS installed on board a research ship in Otsuchi Bay, Iwate Prefecture. The results show that sea surface elevation can be measured with an error less than ten centimeters. Next, we planned the GPS observation using a commercial ferry ship, but it failed to accomplish due to the COVID-19 pandemic. Subsequently, we conducted numerical experiments to assess airplanes as a tsunami observation platform. As a result, it is confirmed that if sufficient data were obtained from multiple commercial airplanes flying over the Nankai Trough, tsunami prediction could be achieved in a shorter observation time and with higher accuracy than with existing ocean bottom pressure gauge observations.

Academic Significance and Societal Importance of the Research Achievements

高精度な津波の即時予測を行うには、地震発生直後に震源に近い沖合で津波を直接観測することが必要不可欠である。本研究では、新たな津波の観測方法として、沖合を航行する船舶に搭載したGPSによって、津波検知に十分な精度で海面変位の測定ができることを示した。さらに、沖合を航行する複数の航空機を使っても、津波を高い精度で予測できる可能性があることを示した。本研究の成果は、将来、船舶や航空機を活用した比較的低コストで全海洋をカバーできる津波予測システムを構築するための基礎となり、津波による人的被害を大幅に軽減させるのに重要な貢献をするものと期待できる。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (15 results)

All 2024 2023 2020 2019

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (8 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Book (2 results)

  • [Journal Article] 小・中学校における流体実験を活用した海洋教育2024

    • Author(s)
      丹羽淑博
    • Journal Title

      日本海洋教育学会誌

      Volume: 1 Pages: 38-52

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 海洋教育における教材開発とその意義2020

    • Author(s)
      日置光久、丹羽淑博
    • Journal Title

      学術の動向

      Volume: 25

    • NAID

      130007945046

    • Related Report
      2020 Research-status Report
    • Open Access
  • [Journal Article] Advanced tsunami detection and forecasting by radar on unconventional airborne observing platforms2020

    • Author(s)
      Iyan E. Mulia, Tomoyuki Hirobe, Daisuke Inazu, Takahiro Endoh, Yoshihiro Niwa, Aditya Riadi Gusman, Hidee Tatehata, Takuji Waseda and Toshiyuki Hibiya
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 2412-2412

    • DOI

      10.1038/s41598-020-59239-1

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Observation of sea surface height using airborne radar altimetry: a new approach for large offshore tsunami detection2019

    • Author(s)
      Tomoyuki Hirobe, Yoshihiro Niwa, Takahiro Endoh, Iyan E. Mulia, Daisuke Inazu, Takero Yoshida, Hidee Tatehata, Akitsugu Nadai, Takuji Waseda and Toshiyuki Hibiya
    • Journal Title

      Journal of Oceanography

      Volume: 75 Issue: 6 Pages: 541-558

    • DOI

      10.1007/s10872-019-00521-w

    • NAID

      40022068161

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Effects of disturbance of seawater excited by internal wave on GNSS-acoustic positioning2019

    • Author(s)
      R. Matsui, M. Kido, Y. Niwa and C. Honsho
    • Journal Title

      Marine Geophysical Research

      Volume: 40 Issue: 4 Pages: 541-555

    • DOI

      10.1007/s11001-019-09394-6

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 地球温暖化に挑む海洋教育2024

    • Author(s)
      嵩倉美帆、淺野亮、安田昌則、高田浩二、丹羽淑博、茅根創
    • Organizer
      日本海洋教育学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 実験と観測データにもとづく海洋教育の教材開発-気仙沼市立鹿折小学校における水産と地球温暖化の授業の事例2023

    • Author(s)
      丹羽淑博
    • Organizer
      日本学術会議学術フォーラム
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] ADS(北極域データアーカイブシステム)の開票データを利用した海洋教育2023

    • Author(s)
      丹羽淑博、毛利亮子、矢吹裕伯
    • Organizer
      日本海洋学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 高解像度海氷・海洋モデルによる海氷数値予測2023

    • Author(s)
      丹羽淑博、大山元夢、山口一郎
    • Organizer
      ArCS II 北極海氷情報室2023年度フォーラム
    • Related Report
      2023 Annual Research Report
  • [Presentation] Arctic Education using Polar Sea Ice Data from ADS (Arctic Data archive System)2023

    • Author(s)
      Yoshihiro Niwa, Akiko Mohri, Hironori Yabuk
    • Organizer
      The 14th Symposium on Polar Science
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Educational Practices using Polar Sea Ice Data for High School Science and Mathematics Classes2023

    • Author(s)
      Yoshihiro Niwa, Takashi Ishibasi, Akiko Mohri, Hironori Yabuki
    • Organizer
      International Symposium on Data Science (DSWS-2023)
    • Related Report
      2023 Annual Research Report
  • [Presentation] 現実の航空機位置データに基づく津波波形インバージョン2019

    • Author(s)
      丹羽淑博、広部智之、早稲田卓爾、日比谷紀之
    • Organizer
      日本海洋学会
    • Related Report
      2019 Research-status Report
  • [Presentation] 「三陸の海の豊かさのひみつを探る」宮城県気仙沼市の小学校における海洋教育の実践2019

    • Author(s)
      丹羽淑博、田口康大
    • Organizer
      日本海洋学会
    • Related Report
      2019 Research-status Report
  • [Book] 東京大学の先生が教える海洋のはなし2023

    • Author(s)
      茅根創・丹羽淑博(編著)
    • Total Pages
      210
    • Publisher
      成山堂書店
    • ISBN
      9784425531912
    • Related Report
      2023 Annual Research Report
  • [Book] 温暖化に挑む海洋教育-呼応的かつ活動的にー2020

    • Author(s)
      丹羽淑博(共著)
    • Total Pages
      258
    • Publisher
      東信堂
    • ISBN
      9784798916262
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2025-01-30  

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