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Mechanistical understanding of chemical feedback process for sulfate aerosols based on triple oxygen isotopes of sulfate in ice cores

Research Project

Project/Area Number 20H04305
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 63010:Environmental dynamic analysis-related
Research InstitutionThe University of Tokyo (2022)
Tokyo Institute of Technology (2020-2021)

Principal Investigator

Hattori Shohei  東京大学, 大学院理学系研究科(理学部), 客員共同研究員 (70700152)

Co-Investigator(Kenkyū-buntansha) 竹内 望  千葉大学, 大学院理学研究院, 教授 (30353452)
石野 咲子  金沢大学, 環日本海域環境研究センター, 助教 (70867431)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2022: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2020: ¥11,700,000 (Direct Cost: ¥9,000,000、Indirect Cost: ¥2,700,000)
Keywords硫酸エアロゾル / 三酸素同位体組成 / アイスコア / 硫酸 / GEOS-Chem / エアロゾル / 大気化学輸送モデル / ケミカルフィードバック
Outline of Research at the Start

1970年代以降のSO2の排出規制にも関わらず、大気エアロゾル及びその主要無機成分である硫酸濃度の減少が鈍化する“ケミカルフィードバック機構”により、効率的な大気汚染の緩和が実施できていないことが指摘されている。しかし、エアロゾル生成に関わる大気化学反応過程の観測的証拠が欠如していることが要因となり、大気中硫酸生成効率の上昇の具体的なメカニズムの特定に至っていない。本研究では、このケミカルフィードバック機構の実態を明らかにするため、アイスコア中の硫酸の三酸素同位体組成から大気硫酸生成過程の変遷を復元する。

Outline of Final Research Achievements

Sulfate aerosols in the atmosphere play a significant role in air pollution and climate change. Sulfate generated through the oxidation of sulfur dioxide in both the gas and liquid phases, and the sulfate formation process can be influenced by environmental conditions. In this study, we focused on investigating the historical changes in sulfate formation processes by applying triple oxygen isotope compositions to ice core samples. Specifically, we reconstructed the sulfate formation processes over the past 60 years from the Greenland
SE-Dome ice core. Our findings revealed that the decrease in atmospheric acidity since the 1970s has promote S(IV) + O3 pathway, which increase conversion efficiency from SO2 to sulfate.

Academic Significance and Societal Importance of the Research Achievements

1970年代以降のSO2の排出規制にも関わらず、大気エアロゾル及びその主要無機成分である硫酸濃度の減少が鈍化する“ケミカルフィードバック機構”により、効率的な大気汚染の緩和が実施できていないことが指摘されている。しかし、エアロゾル生成に関わる大気化学反応過程の観測的証拠が欠如していることが要因となり、大気中硫酸生成効率の上昇の具体的なメカニズムの特定に至っていない。本研究ではアイスコア中の硫酸の三酸素同位体組成から大気硫酸生成過程の変遷を復元することで、過去の硫酸生成過程が変化しているメカニズムを解明した。

Report

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

    (22 results)

All 2022 2021 2020 Other

All Int'l Joint Research (4 results) Journal Article (8 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 8 results,  Open Access: 7 results) Presentation (8 results) (of which Int'l Joint Research: 6 results,  Invited: 4 results) Remarks (2 results)

  • [Int'l Joint Research] グルノーブルアルプス大学(フランス)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] ワシントン大学(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] 中国科学院(中国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] ワシントン大学(米国)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Role of dust and iron solubility in sulfate formation during the long-range transport in East Asia evidenced by 17O-excess signatures2022

    • Author(s)
      S. Itahashi, S. Hattori, A. Ito, Y. Sadanaga, N. Yoshida, A. Matsuki
    • Journal Title

      Environmental Science and Technology

      Volume: 56 Issue: 19 Pages: 13634-13643

    • DOI

      10.1021/acs.est.2c03574

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] High Flux of Small Sulfate Aerosols During the 1970s Reconstructed From the SE‐Dome Ice Core in Greenland2022

    • Author(s)
      Iizuka Y.、Uemura R.、Matsui H.、Oshima N.、Kawakami K.、Hattori S.、Ohno H.、Matoba S.
    • Journal Title

      Journal of Geophysical Research: Atmospheres

      Volume: 127 Issue: 17

    • DOI

      10.1029/2022jd036880

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Gypsum formation from calcite in the atmosphere recorded in aerosol particles transported and trapped in Greenland ice core sample is a signature of secular change of SO2 emission in East Asia2022

    • Author(s)
      Miyamoto Chihiro、Iizuka Yoshinori、Matoba Sumito、Hattori Shohei、Takahashi Yoshio
    • Journal Title

      Atmospheric Environment

      Volume: 278 Pages: 119061-119061

    • DOI

      10.1016/j.atmosenv.2022.119061

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Isotopic evidence for acidity-driven enhancement of sulfate formation after SO2 emission control2021

    • Author(s)
      Hattori Shohei、Iizuka Yoshinori、Alexander Becky、Ishino Sakiko、Fujita Koji、Zhai Shuting、Sherwen Tomas、Oshima Naga、Uemura Ryu、Yamada Akinori、Suzuki Nozomi、Matoba Sumito、Tsuruta Asuka、Savarino Joel、Yoshida Naohiro
    • Journal Title

      Science Advances

      Volume: 7 Issue: 19

    • DOI

      10.1126/sciadv.abd4610

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Isotopic constraints on atmospheric sulfate formation pathways in the Mt. Everest region, southern Tibetan Plateau2021

    • Author(s)
      Wang Kun、Hattori Shohei、Lin Mang、Ishino Sakiko、Alexander Becky、Kamezaki Kazuki、Yoshida Naohiro、Kang Shichang
    • Journal Title

      Atmospheric Chemistry and Physics

      Volume: 21 Issue: 10 Pages: 8357-8376

    • DOI

      10.5194/acp-21-8357-2021

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Regional Characteristics of Atmospheric Sulfate Formation in East Antarctica Imprinted on 17O‐Excess Signature2021

    • Author(s)
      Ishino S.、Hattori S.、Legrand M.、Chen Q.、Alexander B.、Shao J.、Huang J.、Jaegle L.、Jourdain B.、Preunkert S.、Yamada A.、Yoshida N.、Savarino J.
    • Journal Title

      Journal of Geophysical Research: Atmospheres

      Volume: 126 Issue: 6

    • DOI

      10.1029/2020jd033583

    • NAID

      130007977177

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Complete Isotope (δ 15 N, δ 18 O, Δ 17 O) Investigation of Atmospherically Deposited Nitrate in Glacial‐Hydrologic Systems Across the Third Pole Region2020

    • Author(s)
      Lin Mang、Hattori Shohei、Wang Kun、Kang Shichang、Thiemens Mark H.、Yoshida Naohiro
    • Journal Title

      Journal of Geophysical Research: Atmospheres

      Volume: 125 Issue: 19

    • DOI

      10.1029/2019jd031878

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Isotopic constraints on the formation pathways and sources of atmospheric nitrate in the Mt. Everest region2020

    • Author(s)
      Wang Kun、Hattori Shohei、Kang Shichang、Lin Mang、Yoshida Naohiro
    • Journal Title

      Environmental Pollution

      Volume: 267 Pages: 115274-115274

    • DOI

      10.1016/j.envpol.2020.115274

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Application of isotopologues for studies on the atmospheric sulfur cycle2022

    • Author(s)
      Shohei Hattori
    • Organizer
      Japan Geoscience Union (JpGU) Meeting
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Acidity-driven enhancement of sulfate formation after SO2 emission control evidenced by 17O-excess of ice core sulfate2022

    • Author(s)
      Shohei Hattori
    • Organizer
      PAST GLOBAL CHANGES (PAGES) ICYS seminar series
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Atmospheric sulfate formation pathways from its 17O-excess signature: theory and cryospheric applications,2022

    • Author(s)
      Shohei Hattori and Sakiko Ishino
    • Organizer
      CATCH Seminar Series
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 硫酸の三酸素同位体組成を用いた SO2 排出抑制期におけるケミカルフィードバック機構の解明2021

    • Author(s)
      服部 祥平、飯塚芳徳、Alexander Becky、石野 咲子、藤田 耕史、Zhai Shuting、Tomas Sherwen、大島 長、植村 立、山田 明憲、鈴木希実、的場 澄人、鶴田 明日香、Savarino Joel、吉田 尚弘
    • Organizer
      日本地球化学会第68回年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Importance of ammonium for atmospheric sulfate burden evidenced by 17O-excess of ice core sulfate2021

    • Author(s)
      Shohei Hattori
    • Organizer
      第七届全国安定同位素生態学研究会
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Acidity‐driven enhancement of sulfate formation after SO2 emission control evidenced by 17O‐excess of ice core sulfate2021

    • Author(s)
      服部 祥平、飯塚芳徳、Alexander Becky、石野 咲子、藤田 耕史、Zhai Shuting、Tomas Sherwen、大島 長、植村 立、山田 明憲、鈴木希実、的場 澄人、鶴田 明日香、Savarino Joel、吉田 尚弘
    • Organizer
      16th igac science conference
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Oxidation of methanesulfonate into sulfate at inland Antarctica evidenced by 17O-excess signature2021

    • Author(s)
      石野咲子、服部祥平、Michel Legrand 、Qianjie Chen 、Becky Alexander 3、 Jingyuan Shao 3、Jiayue Huang 3、Lyatt Jaegle 3、Bruno Jourdain 2、 Susanne Preunkert、山田明憲 、吉田尚弘、Joel Savarino
    • Organizer
      16th igac science conference
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Isotopic evidence for importance of atmospheric acidity on sulfate formation in the Mt. Everest region2021

    • Author(s)
      Shohei Hattori, Kun Wang, Mang Lin, Sakiko Ishino, Becky Alexander, Kazuki Kamezaki, Naohiro Yoshida, and Shichang Kang
    • Organizer
      EGU General assembly 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Remarks] 北極圏の氷で大気汚染研究 硫酸減らない原因を解明

    • URL

      https://www.nikkei.com/article/DGXZQOUE101JX0Q1A910C2000000/

    • Related Report
      2021 Annual Research Report
  • [Remarks] ~自動化ロボット 実例紹介~ サンプリング装置つくりました

    • URL

      https://lab-brains.as-1.co.jp/serialization/spg-blog/2021/04/1614/

    • Related Report
      2021 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

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