| 研究課題/領域番号 |
21F20397
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| 研究機関 | 名古屋大学 |
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研究代表者 |
持田 陸宏 名古屋大学, 宇宙地球環境研究所, 教授 (10333642)
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| 研究分担者 |
CHANG YUNHUA 名古屋大学, 宇宙地球環境研究所, 外国人特別研究員
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| 研究期間 (年度) |
2021-04-28 – 2023-03-31
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| キーワード | organic aerosol / biomass burning / chemical structure / light absorption / Australia |
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| 研究実績の概要 |
Aerosol samples collected previously on quartz fiber filters with a cut-off diameter of 0.95 micrometer in New South Wales, Australia, were subjected to the extraction under ultrasonication with water, followed by the extraction with methanol and methanol/dichloromethane mixture. The water-soluble matter and the water-insoluble matter from the extractions are going to be used for the offline analysis using a high-resolution time-of-flight aerosol mass spectrometer and light absorption measurements. Further, the temporal variations of the abundances of individual organic compounds (chemical analysis data: provided by collaborators) relative to the concentrations of organic carbon were obtained, to assess the variations of the contributions of organic aerosol sources. The proportion of organic carbon among chemical components in the aerosol was compared to the abundance of levoglucosan, a biomass burning tracer. The contrast of the light-absorption property of the organic aerosol component as a result of the varying contributions of biogenic secondary organic aerosol and biomass burning organic aerosol is a subject to explore; the result from the organic tracer analysis is expected to contribute to it.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
Although the chemical analysis of the extraction of water-soluble and water-insoluble matter is postponed, the utilization of the organic tracer data enabled the characterization of the studied aerosol samples. The tracer-based analysis is beyond the original plan and it could strongly contribute to relate the light absorption property of the organic aerosol compoment and its sources.
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| 今後の研究の推進方策 |
The anlaysis of the chemical structural characteristics of the organic aerosol component is going to be made using the prepared extracts. The offline analysis using an aerosol mass spectrometer has a higher priority than the FTIR anlaysis, partly because the former is suited to the chemical structural characteristics of a broad range of organic components.
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