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"Martin curve" in the western Pacific: Quantification of vertical change of settling particles by optical method

Research Project

Project/Area Number 18H04144
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 63:Environmental analyses and evaluation and related fields
Research InstitutionJapan Agency for Marine-Earth Science and Technology

Principal Investigator

Honda Makio  国立研究開発法人海洋研究開発機構, 地球環境部門(地球表層システム研究センター), 上席研究員(シニア) (20359160)

Co-Investigator(Kenkyū-buntansha) 笹井 義一  国立研究開発法人海洋研究開発機構, 地球環境部門(地球表層システム研究センター), 主任研究員 (40419130)
松本 和彦  国立研究開発法人海洋研究開発機構, 地球環境部門(地球表層システム研究センター), 准研究主任 (50359155)
Eko Siswanto  国立研究開発法人海洋研究開発機構, 地球環境部門(地球表層システム研究センター), 副主任研究員 (90726762)
小栗 一将  国立研究開発法人海洋研究開発機構, 地球環境部門(海洋生物環境影響研究センター), 招聘主任研究員 (10359177)
Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥44,980,000 (Direct Cost: ¥34,600,000、Indirect Cost: ¥10,380,000)
Fiscal Year 2022: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2021: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2020: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2019: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥25,350,000 (Direct Cost: ¥19,500,000、Indirect Cost: ¥5,850,000)
Keywords生物炭素ポンプ / 沈降粒子 / セジメントトラップ / 光学的観測 / 鉛直変化率(マーチンカーブ) / 小粒子 / 後方散乱 / 粒状有機炭素(POC) / 大粒子 / KEO / K2 / 沈降粒子の鉛直変化 / マーチンカーブ / POC光学的観測 / POC / 時系列変化 / 鉛直変化 / バックトラジェクトリー / 後方散乱計 / 時空間変動 / 北西部北太平洋 / 光学観測 / 生物ポンプ / 水中ビデオカメラ / 係留系 / 長期時系列観測 / 鉛直変化の数式化:マーチンカーブ / 西部北太平洋 / 粒子の光学観測 / 観測点K2, S1
Outline of Final Research Achievements

In order to verify the magnitude of biological carbon pump quantitatively, marine particulate materials were optically observed. Backscatter (BS) meter was installed on the sediment trap (ST) mooring system at subarctic time-series station K2 and BS-based particulate organic carbon (POC) were compared with POC observed by ST. Although both seasonal variability were similar, estimated BS-based POC concentration were significantly larger than ST-based POC concentration. BS data from the biogeochemical drifting buoy with biogeochemical sensors (BGC-Argo float) deployed and drifted in the northwestern North Pacific subarctic gyre was also analyzed and BS-based POC flux was compared with ST-based POC flux. Estimated BS-based POC flux was also smaller than that observed by ST. As a result, BS data likely represents slow sinking and small POC while ST observes fast sinking and large POC.

Academic Significance and Societal Importance of the Research Achievements

海洋の二酸化炭素(CO2)吸収メカニズムの一つが、CO2が沈降粒子有機炭素(POC)として海洋内部へ輸送される過程(生物炭素ポンプ:BCP)である。従来、BCP過程はセジメントトラップを海中に係留し沈降粒子を捕集し、化学分析をすることで観測研究されてきたが、係留系維持の経済的困難さゆえデータ数が時空間的に限定されている。そのような中、近年、海中粒子を光学的に観測する手法が普及してきた。世界中に投入されている漂流ブイ(BGC-Argoフロート)に搭載した後方散乱計等で海中粒子中のPOCを時空間的に高密度で測定できれば、BCP研究が飛躍的に推進するものと考えられ、本研究はその先駆的研究である。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (11 results)

All 2022 2021 2020 2019 Other

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

  • [Int'l Joint Research] NOAA/Pacific Marine Environmental Laboratory(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] NOAA/Pacific Marine Environmental Laboratory(米国)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Winter-Spring Phytoplankton Phenology Associated with the Kuroshio Extension Instability2022

    • Author(s)
      Siswanto Eko、Sasai Yoshikazu、Matsumoto Kazuhiko、Honda Makio C.
    • Journal Title

      Remote Sensing

      Volume: 14 Issue: 5 Pages: 1186-1186

    • DOI

      10.3390/rs14051186

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Formation of Subtropical Phytoplankton Blooms Is Dictated by Water Column Stability During Winter and Spring in the Oligotrophic Northwestern North Pacific2021

    • Author(s)
      Matsumoto K.、Sasai Y.、Sasaoka K.、Siswanto E.、Honda M. C.
    • Journal Title

      Journal of Geophysical Research: Oceans

      Volume: 126 Issue: 4

    • DOI

      10.1029/2020jc016864

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Open ocean particle flux variability from surface to seafloor2021

    • Author(s)
      Cael, B. B., L. Bisson, M. Conte, M. T. Duret, C. L. Follett, S. A. Henson, M. C. Honda, M. H. Iversen, D. M. Karl, R. S. Lampitt, C. B. Mouw, F Muller-Karger, C. A. Pebody, K. L. SmitH Jr, and D Talmy
    • Journal Title

      Geophysical Research Letters

      Volume: 48 Issue: 9

    • DOI

      10.1029/2021gl092895

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 海中後方散乱データ解析による生物炭素ポンプ研究2022

    • Author(s)
      本多牧生、細田滋穀、藤木轍一、原田尚美
    • Organizer
      日本地球惑星合同学会(JPGU)
    • Related Report
      2022 Annual Research Report
  • [Presentation] Estimation of POC flux with BGC Argo backscatter data from the western North Pacific2022

    • Author(s)
      Makio Honda, Tetsuichi Fujiki, Shigeki Hosoda, Yoshihisa Mino, Naomi Harada
    • Organizer
      ARGO Science workshop 7
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Comparison of POC flux vertical attenuation between the subarctic and subtropical regions in the western North Pacific2020

    • Author(s)
      本多牧生
    • Organizer
      2020 AGU Ocean Science Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Importance of biogenic opal in the biological pump2019

    • Author(s)
      本多牧生
    • Organizer
      2019 Goldschmidt conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] 西部北太平洋のマーチンカーブ=光学的手法による沈降粒子鉛直変化率の数値化=

    • URL

      https://www.jamstec.go.jp/egcr/j/rr/martincurve/index.html

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report 2020 Annual Research Report
  • [Remarks] 西部北太平洋のマーチンカーブ=光学的手法による沈降粒子鉛直変化率の数値化=

    • URL

      https://ebcrpa.jamstec.go.jp/egcr/j/rr/martincurve/index.html

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report

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Published: 2018-04-23   Modified: 2024-01-30  

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