Integrated analysis of regime shift of Asian PM2.5 pollution
| Project/Area Number |
18H03359
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 63010:Environmental dynamic analysis-related
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| Research Institution | Kyushu University |
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Principal Investigator |
UNO Itsushi 九州大学, 応用力学研究所, 特任教授 (70142099)
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| 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)
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| Project Period (FY) |
2018-04-01 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2021)
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| 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)
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| 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 |
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| 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.
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| 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。
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Report
(5 results)
Research Products
(14 results)
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[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
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Journal Title
Atmos. Enviorn.
Volume: 244
Pages: 117972-117972
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[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.
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Journal Title
Environ. Poll.
Volume: 286
Pages: 117309-117309
DOI
Related Report
Peer Reviewed / Open Access
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[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
