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Detection of fine scale structure in the offshore surface environment using an autonomous underwater vehicle

Research Project

Project/Area Number 20K21841
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 63:Environmental analyses and evaluation and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Komatsu Kosei  東京大学, 大学院新領域創成科学研究科, 准教授 (30371834)

Project Period (FY) 2020-07-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2022: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2020: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Keywords海洋表層微細構造 / 自動観測 / 水中ドローン / 外洋域表層環境 / 微細スケール構造 / 無人潜水機
Outline of Research at the Start

本研究は、従来の手法では観測が困難であった外洋域表層環境の微細スケール構造の実態を現場での直接観測により解明することを目的とする。目的達成のため、調査船を中心とした従来の観測手法に加えて、最近進展が著しい水中ドローンや空中ドローンに各種センサを取付けたIoTの技術を駆使した手法を開発することで、外洋域表層環境における従来の現場観測手法にブレークスルーをもたらし、新しい海洋環境学の構築に貢献することを目指す。

Outline of Final Research Achievements

This study aims to develop an automated method for observing the fine-scale structure of the open ocean surface layer, which has been difficult to observe using conventional methods. A new observing system was developed to automatically measure the 3D structure of water temperature and salinity with a resolution of 5 m in the horizontal direction and 0.1 m in the vertical direction. The system consists of an underwater drone (SEASAM/Notilo Plus) with a memory-type CT meter (A7CT2-USB/JFE Advantech) attached and a GPS-equipped buoy (SEASAM-Navigator/Notilo Plus) moored at the sea surface. We can observe the target area at any resolution by pre-setting the underwater drone's movement path on the controller and transmitting commands to the drone via WiFi.

Academic Significance and Societal Importance of the Research Achievements

本研究で新たに開発した水中ドローンによる海洋表層微細構造の自動観測システムは、従来の観測手法ではアプローチが困難であった、潮目、海上風の吹送作用、波浪のストークスドリフトやラングミュア循環等に伴って海洋表層に生じた水塊の3次元微細構造を直接観測することが可能である。本システムは、水中ドローンに航行に支障のない範囲で多様な複数種のセンサ類を追加することが可能であり、沿岸域から外洋域まで、注目する環境因子の3次元微細分布構造を直接明らかにすることで海洋環境研究に革新的な進展をもたらすことが期待される。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (33 results)

All 2023 2022 2021 2020 Other

All Journal Article (7 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 7 results,  Open Access: 7 results) Presentation (23 results) (of which Int'l Joint Research: 7 results,  Invited: 2 results) Remarks (3 results)

  • [Journal Article] Dynamics of microplastic transport and accumulation in a rural coastal area: Insights from the Otsuchi Bay, a small ria in Sanriku, Japan2023

    • Author(s)
      Wang Yehao、Yamashita Rei、Matsumura Yoshimasa、Ito Shin-ichi、Komatsu Kosei
    • Journal Title

      Regional Studies in Marine Science

      Volume: 62 Pages: 102964-102964

    • DOI

      10.1016/j.rsma.2023.102964

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Contrasting life-history responses to climate variability in eastern and western North Pacific sardine populations2022

    • Author(s)
      Sakamoto, T., Takahashi, M., Chung, M.T., Rykaczewski, R.R., Komatsu, K., Shirai, K., Ishimura, T., Higuchi, T.
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 5298-5298

    • DOI

      10.1038/s41467-022-33019-z

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Overlap between suitable nursery grounds for Japanese anchovy (Engraulis japonicus) and Japanese sardine (Sardinops melanostictus) larvae2022

    • Author(s)
      Nishikawa Haruka、Itoh Sachihiko、Yasuda Ichiro、Komatsu Kosei
    • Journal Title

      Aquaculture, Fish and Fisheries

      Volume: - Issue: 3 Pages: 179-188

    • DOI

      10.1002/aff2.39

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ocean wave observation utilizing motion records of seabirds2021

    • Author(s)
      Uesaka, L., Goto, Y., Yonehara, Y., Komatsu, K., Naruoka, M., Weimerskirch, H., Sato, K., Sakamoto, K. Q.
    • Journal Title

      Progress in Oceanography

      Volume: 200 Pages: 102713-102713

    • DOI

      10.1016/j.pocean.2021.102713

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Elevated turbulent and double-diffusive nutrient flux in the Kuroshio over the Izu Ridge and in the Kuroshio Extension2021

    • Author(s)
      T. Nagai, G. M. Rosales Quintana, G. S. Duran Gomez, F. Hashihama, K. Komatsu
    • Journal Title

      J. Oceanogr

      Volume: 77 Issue: 1 Pages: 55-74

    • DOI

      10.1007/s10872-020-00582-2

    • NAID

      40022471976

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Simplification, not “tropicalization”, of temperate marine ecosystems under ocean warming and acidification2021

    • Author(s)
      Agostini Sylvain、Harvey Ben P.、Milazzo Marco、Wada Shigeki、Kon Koetsu、Floc’h Nicolas、Komatsu Kosei、Kuroyama Mayumi、Hall‐Spencer Jason M.
    • Journal Title

      Global Change Biology

      Volume: 27 Issue: 19 Pages: 4771-4784

    • DOI

      10.1111/gcb.15749

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Otolith δ18O and microstructure analyses provide further evidence of population structure in sardine Sardinops sagax around South Africa2020

    • Author(s)
      Sakamoto Tatsuya、van der Lingen Carl D、Shirai Kotaro、Ishimura Toyoho、Geja Yonela、Peterson James、Komatsu Kosei
    • Journal Title

      ICES Journal of Marine Science

      Volume: 77 Issue: 7-8 Pages: 2669-2680

    • DOI

      10.1093/icesjms/fsaa130

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 黒潮流路上における水蒸気フラックスの実態解明2022

    • Author(s)
      富田博隆・近藤文義・小松幸生
    • Organizer
      2022年度日本海洋学会秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 大槌湾内の波浪に対する四波共鳴相互作用の検証2022

    • Author(s)
      小松幸生・田中潔
    • Organizer
      2022年度日本海洋学会秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Detection of fine-scale internal disturbances generated at the Kuroshio front during the recent large-meander period2022

    • Author(s)
      Kosei Komatsu・Akira Kuwano-Yoshida・Keisuke Ariyoshi
    • Organizer
      日本地球惑星科学連合 (JPGU) 2022年度大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Swell waves directionally selected at the bay mouth of rias facing the western North Pacific2022

    • Author(s)
      Kosei Komatsu・Takaki Fujii・Kiyoshi Tanaka
    • Organizer
      JPGU Meeting 2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] Dependency of microplastic horizontal distribution on the size and density of particles accumulated on the seafloor in Otsuchi Bay, Japan2022

    • Author(s)
      Yehao Wang・Rei Yamashita・Yoshimasa Matsumura・Shin-ichi Ito・Kosei Komatsu
    • Organizer
      American Geophysical Union 2022 Fall Meeting
    • Related Report
      2022 Annual Research Report
  • [Presentation] Spatiotemporal variation of microplastics in water columns of Otsuchi Bay2022

    • Author(s)
      Yehao Wang・Rei Yamashita・Kosei Komatsu
    • Organizer
      International Online Workshop on Microplastics Issues “Plastic Pollution in Asian Waters - from Land to Ocean”
    • Related Report
      2022 Annual Research Report
  • [Presentation] 半閉鎖性内湾域の海底に堆積したマイクロプラスチックの水平分布における粒子サイズと密度に対する依存性2022

    • Author(s)
      Yehao Wang・Rei Yamashita・Shin-ichi Ito・Kosei Komatsu
    • Organizer
      日本海洋学会2022年度秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Spatiotemporal distribution of microplastics in sediments of Otsuchi Bay, Japan2022

    • Author(s)
      Yehao Wang・Rei Yamashita・Shin-ichi Ito・Kosei Komatsu
    • Organizer
      日本地球惑星科学連合 (JPGU) 2022年度大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Spatiotemporal variation of microplastic in water columns of Otsuchi Bay2022

    • Author(s)
      Yehao Wang・Rei Yamashita・Shin-ichi Ito・Kosei Komatsu
    • Organizer
      2022年度海洋若手研究集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 大槌湾内で観測された波浪の4波共鳴相互作用について2022

    • Author(s)
      小松幸生
    • Organizer
      名古屋大学宇宙地球環境研究所の共同利用研究集会「海洋波および大気海洋相互作用に関するワークショップ」
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Spatiotemporal variation of microplastics inwater columns of Otsuchi Bay2022

    • Author(s)
      Wang, Y., Yamashita, R., and Komatsu, K.
    • Organizer
      International OnlineWorkshop on Microplastics Issues, Plastic pollution in Asian waters - from Land to Ocean
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Unidirectional Swell Waves Selected at the Bay Mouth of Rias Facing the Western North Pacific2022

    • Author(s)
      Komatsu, K., Fujii, T., and Tanaka, K.
    • Organizer
      Ocean Science Meeting 2022
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Horizontal distribution of concentration and composition of microplastics in sediments of Otsuchi Bay, Japan2021

    • Author(s)
      Wang, Y., Yamashita, R., and Komatsu, K.
    • Organizer
      The 18th Japanese-French Oceanography Mini-Symposium
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Ocean wave characters obtained from logger-mounted floating seabirds2021

    • Author(s)
      Uesaka, L., Goto, Y., Yonehara, Y., Komatsu, K., Naruoka, M., Weimerskirch, H., Sato, K., Sakamoto, K. Q.
    • Organizer
      The 7th International bio-logging science symposium
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 黒潮域における 水平拡散係数のスケール依存性2021

    • Author(s)
      小松幸生,廣江 豊
    • Organizer
      水産海洋学会2021年度研究発表大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 海底圧力計による黒潮域の海洋内部擾乱の伝播特性について2021

    • Author(s)
      小松幸生,吉田 聡,有吉慶介
    • Organizer
      2021年度日本海洋学会秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 三陸リアス海岸のうねり性波浪の起源について2021

    • Author(s)
      小松幸生,藤井孝樹,田中 潔
    • Organizer
      日本地球惑星科学連合2021年度大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 大槌湾のうねりの特性と風波との関係2021

    • Author(s)
      小松幸生
    • Organizer
      名古屋大学宇宙地球環境研究所共同利用研究集会「海洋波および大気海洋相互作用に関するワークショップ」
    • Related Report
      2020 Research-status Report
  • [Presentation] An integrated observation system from the ocean bottom to the atmosphere to study air-sea interaction in the Kuroshio region south of Shionomisaki2020

    • Author(s)
      Kosei Komatsu, Akira Kuwano-Yoshida, Keisuke Ariyoshi
    • Organizer
      JPGU-AGU Joint Meeting 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Effect of swells on the development of wind waves in the real ocean2020

    • Author(s)
      Kosei Komatsu, Hirotaka Omatsu, Kiyoshi Tanaka
    • Organizer
      JPGU-AGU Joint Meeting 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Detection of fine-scale internal disturbances generated at the Kuroshio front2020

    • Author(s)
      Kosei Komatsu, Akira Kuwano-Yoshida, Keisuke Ariyoshi
    • Organizer
      PICES 2020 Annual meeting
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 大槌湾内においてうねりが風波の発達に与える影響の実態について2020

    • Author(s)
      小松幸生, 尾松弘嵩, 田中潔
    • Organizer
      日本海洋学会2020年度秋季大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 大槌湾内の波浪・風モニタリングの総括2020

    • Author(s)
      小松幸生
    • Organizer
      九州大学応用力学研究所「日本周辺海域の海況モニタリングと波浪計測に関する研究集会」
    • Related Report
      2020 Research-status Report
  • [Remarks] 水中ドローンの試験運用

    • URL

      http://lmr.aori.u-tokyo.ac.jp/feog/kosei/photo.html

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
  • [Remarks] 新青丸KS-21-11航海

    • URL

      http://lmr.aori.u-tokyo.ac.jp/feog/kosei/photo.html

    • Related Report
      2021 Research-status Report
  • [Remarks] 研究Topics

    • URL

      http://lmr.aori.u-tokyo.ac.jp/feog/kosei/

    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-08-03   Modified: 2024-01-30  

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