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Blue carbon paradigm for contributing to environmental management in bays surrounded by big cities

Research Project

Project/Area Number 20H02250
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 22040:Hydroengineering-related
Research InstitutionThe University of Tokyo

Principal Investigator

Sasaki Jun  東京大学, 大学院新領域創成科学研究科, 教授 (50292884)

Co-Investigator(Kenkyū-buntansha) 遠藤 徹  大阪公立大学, 大学院工学研究科, 准教授 (00527773)
大谷 壮介  大阪公立大学工業高等専門学校, その他部局等, 准教授 (60554219)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2023: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2022: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
Keywordsブルーカーボン / 内湾 / 数値モデル / 現地観測 / 港湾 / 藻場 / 干潟 / 湿地 / 東京湾 / 大阪湾 / 二酸化炭素フラックス / 気候変動
Outline of Research at the Start

大都市内湾が有する高い二酸化炭素吸収機能(ブルーカーボン)に焦点を当て,河口から沖合に向かって連続する,ヨシ原,干潟・浅場,港湾,沖合等の多様な環境場を対象とし,現地調査と数値計算を融合した評価手法を開発し,CO2吸収量の算定と変動要因の考察を行う.また,各環境場の活動量(面積)を把握し,内湾全体のCO2吸収量を評価する.環境劣化が課題となっている都市内湾のかつての豊かな姿を評価し,生態系サービスとの相乗効果を含む,環境管理の理念構築と社会実装に資する都市内湾ブルーカーボン像の提示を試みる.

Outline of Final Research Achievements

This study aims to clarify blue carbon, defined as carbon sequestered and stored in marine ecosystems, in Tokyo Bay and Osaka Bay. We developed and applied a practical continuous observation method of carbon dioxide partial pressure and quantified and characterized the carbon removal and emission processes in various environmental sites in these urban bays, such as harbor areas, estuarine wetlands, seaweed beds, and tidal flats, and offshore areas, using the eddy correlation method and chamber method as well. We also developed a practical automated classification method for seagrass beds by combining a drone and deep learning and presented a carbon storage assessment method for seagrass beds, including seaweed racks washed up on a sandy beach.

Academic Significance and Societal Importance of the Research Achievements

下水道の整備された東京湾や大阪湾のような都市内湾は炭素吸収機能が高いことが一般に知られているが,夏季の底層に発生する貧酸素水塊(酸欠の底層海水)の湧昇現象(風による流れで底層水が表層に湧き上がる現象)である青潮時には大きな炭素排出となる等,都市内湾に存在する多様な環境場における炭素過程は時空間変動が大きいことを示した.ブルーカーボン政策を推進する上で,炭素の吸収・排出の動態を可視化することによってその評価の信頼性を高め,市民の理解や合意形成を図っていくために,廉価で実用的な観測手法の構築が重要であることを示唆した.

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (34 results)

All 2024 2023 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (13 results) (of which Peer Reviewed: 11 results,  Open Access: 3 results) Presentation (20 results) (of which Int'l Joint Research: 4 results,  Invited: 4 results)

  • [Int'l Joint Research] マサチューセッツ大学ダートマス校(米国)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] 東京湾における環境再生と気候変動の緩和に向けて2024

    • Author(s)
      佐々木淳
    • Journal Title

      HEDORO

      Volume: 144 Pages: 40-49

    • Related Report
      2023 Annual Research Report
  • [Journal Article] UAV-based seagrass wrack orthophotos classification for estimating blue carbon2023

    • Author(s)
      Chen Jundong、Sasaki Jun、Guo Zhiling、Endo Masanori
    • Journal Title

      Estuarine, Coastal and Shelf Science

      Volume: 293 Pages: 108476-108476

    • DOI

      10.1016/j.ecss.2023.108476

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] ブルーカーボン生態系の活用ーその特徴と温室効果ガス吸収源対策への貢献ー2023

    • Author(s)
      佐々木淳
    • Journal Title

      ベース設計資料

      Volume: 193 Pages: 47-50

    • Related Report
      2023 Annual Research Report
  • [Journal Article] FLUCTUATION CHARACTERISTICS OF ATMOSPHERIC AND WATER SURFACE CARBON DIOXIDE FLUXES BY CONTINUOUS OBSERVATIONS IN BRACKISH SALT MARSH2023

    • Author(s)
      大谷 壮介, 山里 輝
    • Journal Title

      Japanese Journal of JSCE

      Volume: 79 Issue: 17 Pages: n/a

    • DOI

      10.2208/jscejj.23-17147

    • ISSN
      2436-6021
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] STARTING IN 2023, JOURNAL OF JSCE WILL HAVE A NEW STRUCTURE2023

    • Author(s)
      遠藤 徹, 上村 健太, 小倉 一輝
    • Journal Title

      Japanese Journal of JSCE

      Volume: 79 Issue: 1 Pages: n/a

    • DOI

      10.2208/jscejj.22-01000

    • ISSN
      2436-6021
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A practical pCO2 estimation and carbonate dynamics at an event of hypoxic water upwelling in Tokyo Bay2023

    • Author(s)
      Endo, M., Zhao, Y., Nakamura, W., Sasaki, J.
    • Journal Title

      Frontiers in Marine Science

      Volume: 9 Pages: 1016199-1016199

    • DOI

      10.3389/fmars.2022.1016199

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] CONTINUOUS OBSERVATION OF PARTIAL PRESSURE OF CARBON DIOXIDE IN WINTER AT A PORT IN THE HEAD OF TOKYO BAY2022

    • Author(s)
      遠藤 雅実, SUN Jing, 佐々木 淳
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

      Volume: 78 Issue: 2 Pages: I_799-I_804

    • DOI

      10.2208/kaigan.78.2_I_799

    • ISSN
      1883-8944, 1884-2399
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] ESTIMATED PRECISION OF pCO<sub>2</sub> BASED ON CARBONATE CHEMISTRY IN BRACKISH WATERS2022

    • Author(s)
      中村 航, 遠藤 雅実, 佐々木 淳, 遠藤 徹, 趙 悦, 上村 健太, 小倉 一輝
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

      Volume: 78 Issue: 2 Pages: I_805-I_810

    • DOI

      10.2208/kaigan.78.2_I_805

    • ISSN
      1883-8944, 1884-2399
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Numerical assessment of coastal multihazard vulnerability in Tokyo Bay2022

    • Author(s)
      Liu, F., Sasaki, J., Chen, J., Wang, Y.
    • Journal Title

      Natural Hazards

      Volume: 114 Issue: 3 Pages: 3597-3625

    • DOI

      10.1007/s11069-022-05533-2

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An effective process-based modeling approach for predicting hypoxia and blue tide in Tokyo Bay2022

    • Author(s)
      Wang K., Nakamura, Y., Sasaki, J., Inoue, T., Higa, H., Suzuki, T., Hafeez Muhammad Ali
    • Journal Title

      Coastal Engineering Journal

      Volume: 64 Issue: 3 Pages: 458-476

    • DOI

      10.1080/21664250.2022.2119011

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Mapping of Subtidal and Intertidal Seagrass Meadows via Application of the Feature Pyramid Network to Unmanned Aerial Vehicle Orthophotos2021

    • Author(s)
      Chen, J. and Sasaki, J.
    • Journal Title

      Remote Sensing

      Volume: 13 Issue: 23 Pages: 4880-4880

    • DOI

      10.3390/rs13234880

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] CLASSIFICATION OF SEA AREAS BASED ON THE CHARACTERISTICS OF LONG-TERM VARIATION OF SEAWATER pCO<sub>2</sub> IN OSAKA BAY2021

    • Author(s)
      遠藤徹・中谷健二・中道優
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

      Volume: 77 Issue: 2 Pages: I_835-I_840

    • DOI

      10.2208/kaigan.77.2_I_835

    • NAID

      130008113406

    • ISSN
      1883-8944, 1884-2399
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Assessing the Natural Recovery of Mangroves after Human Disturbance Using Neural Network Classification and Sentinel-2 Imagery in Wunbaik Mangrove Forest, Myanmar2021

    • Author(s)
      Maung Win Sithu、Sasaki Jun
    • Journal Title

      Remote Sensing

      Volume: 13 Issue: 1 Pages: 52-52

    • DOI

      10.3390/rs13010052

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Carbon removal and emission processes and the promotion of climate change mitigation in Tokyo Bay2023

    • Author(s)
      Sasaki, J., Endo, M., Wataru, N., Ishida, K., Chen, J.
    • Organizer
      14th International Conference on Coasts, Ports and Marine Structures
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 東京湾富津海岸におけるアマモの炭素固定量に関する現地実験2023

    • Author(s)
      遠藤雅実,王傑,佐々木淳
    • Organizer
      日本沿岸域学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Continuous observation of pCO2 in Autumn in the head of Tokyo Bay2023

    • Author(s)
      Endo, M., Sasaki, J.
    • Organizer
      11th International Conference on Asian and Pacific Coasts
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 流動モデルを用いた東京湾のノリ漁場における栄養塩の起源解析2023

    • Author(s)
      石田紘大,佐々木淳,Chen Jundong
    • Organizer
      土木学会海岸工学講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 淀川汽水域の干潟および湿地帯における堆積物の有機炭素貯留量の試算2023

    • Author(s)
      古木健太郎,大谷壮介,東和之,遠藤徹
    • Organizer
      2023年度関西土木工学交流発表会
    • Related Report
      2023 Annual Research Report
  • [Presentation] ブルーカーボンのこれまでとこれから2023

    • Author(s)
      佐々木 淳
    • Organizer
      第17回海の再生全国会議 in 東京湾
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Towards a resilient and abundant urban bay under climate change through adaptation and mitigation measures linked with ecosystem services2022

    • Author(s)
      Sasaki, J.
    • Organizer
      The 17th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-17)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 東京湾奥部港湾域における冬季の二酸化炭素分圧の連続観測2022

    • Author(s)
      〇遠藤雅実,Sun Jing,佐々木淳
    • Organizer
      第69回土木学会海岸工学講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 炭酸化学理論に基づく汽水域における水中CO2分圧の推定精度2022

    • Author(s)
      〇中村航, 遠藤雅実, 佐々木淳, 遠藤徹, 趙悦, 上村健太, 小倉一輝
    • Organizer
      第69回土木学会海岸工学講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 東京湾奥部港湾環境における二酸化炭素分圧測定に関する検討2022

    • Author(s)
      〇遠藤雅実,趙悦,佐々木淳
    • Organizer
      第34回日本沿岸域学会研究討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Mapping of Seagrass Meadows via Application of the Feature Pyramid Network to Unmanned Aerial Vehicle Orthophotos2022

    • Author(s)
      〇 Chen, J. and Sasaki, J.
    • Organizer
      第69回土木学会海岸工学講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 河口湿地帯の大気および水面における二酸化炭素フラックスの観測2022

    • Author(s)
      〇山里輝,大谷壮介
    • Organizer
      第29回瀬戸内海研究フォーラムin和歌山
    • Related Report
      2022 Annual Research Report
  • [Presentation] 大阪湾沿岸部における二酸化炭素分圧の空間分布2022

    • Author(s)
      〇大谷壮介,遠藤徹
    • Organizer
      第29回瀬戸内海研究フォーラムin和歌山
    • Related Report
      2022 Annual Research Report
  • [Presentation] 水質連続モニタリングによる港湾、干潟およびダム貯水池のCO2変動特性の把握2022

    • Author(s)
      〇小倉一輝,遠藤徹,上村健太,酒井大樹
    • Organizer
      2022年度土木学会関西支部年次学術講演会@関西大学
    • Related Report
      2022 Annual Research Report
  • [Presentation] 環境統計データによる大阪湾と播磨灘における二酸化炭素吸収量の推定2022

    • Author(s)
      〇細木拓志,遠藤徹
    • Organizer
      2022年度土木学会関西支部年次学術講演会@関西大学
    • Related Report
      2022 Annual Research Report
  • [Presentation] 3-dimensional process-based ecosystem model for hypoxia and blue tide and its application to Tokyo Bay2021

    • Author(s)
      Wang, K., Nakamura, Y., Sasaki,J., Inoue, T., Higa, H., Suzuki, T.
    • Organizer
      第68回海岸工学講演会(土木学会)
    • Related Report
      2021 Annual Research Report
  • [Presentation] Estuarine environmental processes and management from the past toward future2021

    • Author(s)
      Sasaki, J.
    • Organizer
      3rd JSCE-CCES Joint Symposium of Civil Engineering
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 大阪湾におけるCO2分圧の長期変動特性に着目した海域分類に関する研究2021

    • Author(s)
      遠藤 徹・中谷健二・中道 優
    • Organizer
      第68回海岸工学講演会,オンライン
    • Related Report
      2021 Annual Research Report
  • [Presentation] 大阪湾における40年間の表層CO2分圧の時空間変動と海域分布特性に関する研究2021

    • Author(s)
      中道優・遠藤徹
    • Organizer
      2021年度土木学会関西支部年次学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 大和川におけるCO2濃度の日内変動とその変動要因に関する研究2020

    • Author(s)
      済木智貴・遠藤徹・原田範子
    • Organizer
      2020年度土木学会関西支部年次学術講演会
    • Related Report
      2020 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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