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Integrated analysis of regime shift of Asian PM2.5 pollution

Research Project

Project/Area Number 18H03359
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 InstitutionKyushu University

Principal Investigator

UNO Itsushi  九州大学, 応用力学研究所, 特任教授 (70142099)

Co-Investigator(Kenkyū-buntansha) 板橋 秀一  一般財団法人電力中央研究所, 環境科学研究所, 主任研究員 (10714537)
弓本 桂也  九州大学, 応用力学研究所, 教授 (50607786)
王 哲  九州大学, 応用力学研究所, 助教 (30791602)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2018: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Keywords東アジア / PM2.5レジーム / 経年変化 / 排出量変化 / モデル解析 / CODIV-19 / 野外観測 / モデルシミュレーション / COVID-19 / PM2.5汚染レジーム
Outline of Final Research Achievements

Changes in the composition of aerosol chemical components resulting from changes in emissions in China from 2012 to 2021 are summarized. (1) The impact of environmental improvements in China was quantitatively evaluated and source-receptor analysis using a chemical transport model revealed that PM2.5 concentrations in downwind areas were improved. However, the difference in SO2 and NOx reduction rates was due to a chemical imbalance in the ammonia-nitrate-sulfate-water system, which resulted in more nitrate generation. Observations and numerical modeling on a clean remote island in western Japan confirmed that the major component in PM2.5 is changing from sulfate to nitrate (paradigm shift); the effect of lockdown associated with the spread of COVID-19 was also added to the study.

Academic Significance and Societal Importance of the Research Achievements

2012年から2021年にかけての、中国の排出量変化に伴って生じたエアロゾル化学成分の組成の変化についてまとめた。さらにCOVID-19の蔓延にともなう大規模なロックダウンの効果を観測データ解析と化学輸送モデルによる解析から明らかにした。排出量の変化によるアンモニア-硝酸-硫酸-水系の化学的不均衡により、硝酸塩の発生が多くなることになった。西日本の清浄な離島での観測と数値モデリングにより、PM2.5の中の主要成分が硫酸塩から硝酸塩に変化しつつある(パラダイムシフト)が確認され、これらの結果をUno et al. (2020, Scientific Reports)に発表した。

Report

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

    (14 results)

All 2022 2021 2020 2019

All Journal Article (10 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 10 results,  Open Access: 10 results) Presentation (3 results) Book (1 results)

  • [Journal Article] Returning impact of long-range PM2.5 transport over East Asia in 2021 after Chinese economic recovery from the COVID-19 pandemic2022

    • Author(s)
      Itahashi,S., Y.Yamamura, Z.Wang and I. Uno
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1

    • DOI

      10.1038/s41598-022-09388-2

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Impacts of COVID-19 lockdown, Spring Festival and meteorology on the NO2 variations in early 2020 over China based on in-situ observations, satellite retrievals and model simulations2021

    • Author(s)
      Wang, Z., Uno,I., Yumimoto, K., Itahashi, S., Chen, X., Yang, W. and Zifa Wang
    • Journal Title

      Atmos. Enviorn.

      Volume: 244 Pages: 117972-117972

    • DOI

      10.1016/j.atmosenv.2020.117972

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 中国における人為起源排出規制による東アジアスケールのエアロゾル組成の変化2021

    • Author(s)
      鵜野伊津志、板橋 秀一、王 哲
    • Journal Title

      エアロゾル研究

      Volume: 36, Pages: 110-114

    • NAID

      130008054290

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The 36-Year Historical Variation of Precipitation Chemistry during 1976-2011 at Ryori WMO-GAW Station in Japan2021

    • Author(s)
      Itahashi,S., J. Kurokawa, T. Ohara, I. Uno, S. Fujita
    • Journal Title

      SOLA

      Volume: 17 Pages: 184-190

    • NAID

      130008104029

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nitrogen burden from atmospheric deposition in East Asian oceans in 2010 based on high-resolution regional numerical modeling2021

    • Author(s)
      Itahashi, S., Hayashi, K, Takeda, S., Umezawa, Y., Matsuda, K., Sakurai, T., Uno, I.
    • Journal Title

      Environ. Poll.

      Volume: 286 Pages: 117309-117309

    • DOI

      10.1016/j.envpol.2021.117309

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Paradigm shift in aerosol chemical composition over regions downwind of China2020

    • Author(s)
      Uno,I., Z. Wang, S. Itahashi, K. Yumimoto, Y. Yamamura, A. Yoshino, A. Takami, M.Hayasaki and B-G. Kim
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1

    • DOI

      10.1038/s41598-020-63592-6

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Spatio-Temporal Variations of Atmospheric NH3 over East Asia by Comparison of Chemical Transport Model Results, Satellite Retrievals and Surface Observations2020

    • Author(s)
      Wang, Z.; Uno, I.; Osada, K.; Itahashi, S.; Yumimoto, K.; Chen, X.; Yang, W.; Wang, Z.
    • Journal Title

      Atmosphere

      Volume: 11

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 夏季の太平洋高気圧条件下における高濃度PM2.5に対する火山の寄与解析2020

    • Author(s)
      山村由貴,新谷俊二, 力寿雄,中川修平, 王哲,鵜野伊津志
    • Journal Title

      大気環境学会誌

      Volume: 55 Pages: 169-180

    • NAID

      130007872140

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] COVID-19に対する中国のロックダウン期間におけるPM2.5越境輸送の変容2020

    • Author(s)
      板橋 秀一, 王 哲, 弓本 桂也, 鵜野 伊津志
    • Journal Title

      大気環境学会誌

      Volume: 55 Pages: 239-247

    • NAID

      130007925075

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dust Heterogeneous Reactions during Long-Range Transport of a Severe Dust Storm in May 2017 over East Asia,2019

    • Author(s)
      Wang, Z., Uno, I., Yumimoto, K., et al.
    • Journal Title

      Atmosphere

      Volume: 10 Issue: 11 Pages: 680-680

    • DOI

      10.3390/atmos10110680

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 東アジアスケールのエアロゾル組成の変化:新型コロナ感染対策による排出量変化の影響2021

    • Author(s)
      ○板橋 秀一,山村 由貴,鵜野 伊津志
    • Organizer
      第 38 回エアロゾル科学・技術研究討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 最近のPM2.5越境汚染の濃度減少と組成の変化について2019

    • Author(s)
      鵜野伊津志、板橋秀一、弓本桂也、王晢ほか
    • Organizer
      第60回大気環境学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] PM2.5越境汚染の最近の傾向について(2)2019

    • Author(s)
      鵜野伊津志
    • Organizer
      第19回大気環境学会九州支部研究発表会
    • Related Report
      2018 Annual Research Report
  • [Book] 大気環境モデリング2021

    • Author(s)
      鵜野伊津志編著, 弓本桂也, 板橋秀一共著
    • Total Pages
      306
    • Publisher
      森北出版社
    • ISBN
      9784627291010
    • Related Report
      2020 Annual Research Report

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Published: 2018-04-23   Modified: 2023-01-30  

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