2021 Fiscal Year Final Research Report
Deepening the quantitative understanding of the hygroscopicity of atmospheric organic aerosol: Its relationship to chemical structures and sources
| Project/Area Number |
19H04253
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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 | Nagoya University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
松井 仁志 名古屋大学, 環境学研究科, 准教授 (50549508)
宮崎 雄三 北海道大学, 低温科学研究所, 助教 (60376655)
大畑 祥 名古屋大学, 高等研究院(宇宙), 助教 (70796250)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 有機エアロゾル / 化学構造 / 吸湿性 / 起源 |
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| Outline of Final Research Achievements |
In this study, the relationships of the hygroscopicity of organic components in atmospheric aerosol samples with the chemical structures and sources were investigated. For urban aerosols, the mass spectral analysis of the extracts from aerosol samples showed the contributions of organics associated with their sources and chemical structure. Further, the relationships of the hygroscopicity of humic-like substances with the oxygen-to-carbon ratios and sources were obtained. For forest aerosols, the atmospheric concentrations of organic fractions were determined based on mass spectral analysis. Based on the hygroscopic growth measurements for particles such as those composed of the mixtures of humic-like substances and ammonium sulfate, results for the assessment of the additivity of hygroscopicity were also obtained.
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| Free Research Field |
大気化学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では、大気エアロゾル試料に含まれる有機物（有機エアロゾル）の吸湿性と化学構造・発生源の関係について、有機エアロゾルに含まれる化合物群に着目して知見を得た。得られた成果は、大気中の雲凝結核に含まれる有機物の役割の理解に貢献するものであり、有機エアロゾルの気候影響の正確な把握に寄与するものと言える。複雑な組成を持つ有機物の特徴を化合物群ごとに整理する取り組みであり、このような分析的アプローチの有用性を示す成果とも言える。
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