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Building the Foundation for Practical Utilization and International Cooperative Wide-Area Observation of Atmospheric and Oceanic Microparticles

Research Project

Project/Area Number 19KK0289
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research (A))

Allocation TypeMulti-year Fund
Review Section Basic Section 63010:Environmental dynamic analysis-related
Research InstitutionTokyo Metropolitan University (2023)
The University of Tokyo (2019-2022)

Principal Investigator

Moteki Nobuhiro  東京都立大学, 理学研究科, 准教授 (20507818)

Project Period (FY) 2019 – 2023
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
Keywordsエアロゾル / 海洋微粒子 / 光散乱 / 観測装置 / 黒色炭素 / 鉱物ダスト / 装置開発 / 微粒子測定 / 大気微粒子 / 海洋懸濁粒子
Outline of Research at the Start

本国際共同研究では、基課題研究にて発明した新たな微粒子測定法を、実際の大気微粒子や海洋微粒子の観測に実用化するための基礎固めをする。そのために、大気・海洋の観測研究で世界をリードしている米国海洋大気庁NOAAの地球システム研究所ESRLに1年間滞在し、地上や航空機において安定して連続観測できる装置の共同開発を行う。またNOAAなどが所有・開発してきている他の最先端の測定手法と組み合わせることにより、微粒子を多角的に測定する複合測定・データ解析手法の開発も行う。

Outline of Final Research Achievements

Working in collaboration with researchers and technicians from the destination research institution, we made two improvements to the "Complex Scattering Amplitude Sensing Method," a versatile analysis technique for dispersed particles in either liquid or gas phases. Firstly, we designed and developed an optical system and detector capable of detecting complex scattering amplitudes for two orthogonal polarization components. This enhancement allows for the retrieval of information on particle non-sphericity, leading to a significant improvement in the discrimination capability of particle types in environments such as mineral dust. Secondly, we developed a system to detect forward scattering waves while simultaneously detecting backward scattering waves using a low-coherence Michelson interferometer. With this technology, it became possible to measure the complex scattering amplitudes for each polarization with an error margin of ±5%.

Academic Significance and Societal Importance of the Research Achievements

本研究で開発した微粒子分析法は、試料の前処理が要らないため、大気や海水をそのまま導入して連続的に測定することができる。今後、地球環境問題に関わる大気・海洋中の多種多様な汚染微粒子の広域観測への応用が期待される。また、試料の汚染や破壊をすることがない分析法であるため、他の分析装置と組み合わせた複合分析や、血液など生体試料の計測にも利用できる。産業利用が急速に広まっている水中の微小気泡(ファインバブル)についても、他の不純物粒子と区別した正確な測定が初めて可能となる。本研究で開発した汎用粒子分析法は、今後、環境動態解析・産業技術・医療技術などに応用されていくことが期待される。

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

    (12 results)

All 2023 2022 2021

All Int'l Joint Research (1 results) Journal Article (8 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 7 results,  Open Access: 7 results) Presentation (2 results) (of which Int'l Joint Research: 2 results) Patent(Industrial Property Rights) (1 results)

  • [Int'l Joint Research] National Oceanic and Atmospheric Administration, Earth System Research Laboratory (NOAA ESRL)(米国)2022

    • Year and Date
      2022-08-30
    • Related Report
      2023 Annual Research Report
  • [Journal Article] Constraining the complex refractive index of black carbon particles using the complex forward-scattering amplitude2023

    • Author(s)
      Moteki Nobuhiro、Ohata Sho、Yoshida Atsushi、Adachi Kouji
    • Journal Title

      Aerosol Science and Technology

      Volume: 57 Issue: 7 Pages: 678-699

    • DOI

      10.1080/02786826.2023.2202243

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Unified theoretical framework for black carbon mixing state allows greater accuracy of climate effect estimation2023

    • Author(s)
      Wang Jiandong、Wang Jiaping、Cai Runlong、Liu Chao、Jiang Jingkun、Nie Wei、Wang Jinbo、Moteki Nobuhiro、Zaveri Rahul A.、et al.
    • Journal Title

      Nature Communications

      Volume: 14 Issue: 1

    • DOI

      10.1038/s41467-023-38330-x

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A signature of aged biogenic compounds detected from airborne VOC measurements in the high arctic atmosphere in March/April 20182023

    • Author(s)
      Holzinger Rupert、Eppers Oliver、Adachi Kouji、Bozem Heiko、Hartmann Markus、Herber Andreas、Koike Makoto、Millet Dylan B.、Moteki Nobuhiro、Ohata Sho、Stratmann Frank、Yoshida Atsushi
    • Journal Title

      Atmospheric Environment

      Volume: 309 Pages: 119919-119919

    • DOI

      10.1016/j.atmosenv.2023.119919

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evaluation of a method to quantify the number concentrations of submicron water-insoluble aerosol particles based on filter sampling and complex forward-scattering amplitude measurements2023

    • Author(s)
      Ohata Sho、Moteki Nobuhiro、Kawanago Hikaru、Tobo Yutaka、Adachi Kouji、Mochida Michihiro
    • Journal Title

      Aerosol Science and Technology

      Volume: 57 Issue: 10 Pages: 1013-1030

    • DOI

      10.1080/02786826.2023.2223387

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 気候に関わる成層圏エアロゾル研究の最前線2023

    • Author(s)
      茂木信宏
    • Journal Title

      Japan Geoscience Letters

      Volume: 19

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Climate-relevant properties of black carbon aerosols revealed by in situ measurements: a review2023

    • Author(s)
      Moteki Nobuhiro
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 10 Issue: 1 Pages: 1-1

    • DOI

      10.1186/s40645-023-00544-4

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Identification and particle sizing of submicron mineral dust by using complex forward-scattering amplitude data2022

    • Author(s)
      Yoshida Atsushi、Moteki Nobuhiro、Adachi Kouji
    • Journal Title

      Aerosol Science and Technology

      Volume: Online Issue: 7 Pages: 1-14

    • DOI

      10.1080/02786826.2022.2057839

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Measuring the complex forward-scattering amplitude of single particles by self-reference interferometry: CAS-v1 protocol2021

    • Author(s)
      Moteki Nobuhiro
    • Journal Title

      Optics Express

      Volume: 29 Issue: 13 Pages: 20688-20688

    • DOI

      10.1364/oe.423175

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] A polarization-resolved sensor of complex forward-scattering amplitude for inline measurements of mineral dust and other particles2023

    • Author(s)
      Moteki, N., Adachi, K.
    • Organizer
      AGU annual meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Constraining the complex refractive index of black carbon and light-absorbing iron oxides according to their complex forward-scattering amplitude at 633 nm wavelength2022

    • Author(s)
      N. Moteki, S. Ohata, A. Yoshida, K. Adachi
    • Organizer
      AGU fall meeting 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Patent(Industrial Property Rights)] 微粒子識別装置及び微粒子識別方法2021

    • Inventor(s)
      茂木信宏
    • Industrial Property Rights Holder
      茂木信宏
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2020 Research-status Report

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Published: 2020-02-06   Modified: 2025-01-30  

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