2022 Fiscal Year Final Research Report
Elucidation of Carbonyl Sulfide missing source and global budget by application of sulfur isotopes
| Project/Area Number |
20H01975
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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 17020:Atmospheric and hydrospheric sciences-related
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| Research Institution | Sophia University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
亀崎 和輝 国立研究開発法人産業技術総合研究所, エネルギー・環境領域, 研究員 (00910142)
服部 祥平 東京工業大学, 物質理工学院, 研究員 (70700152)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 硫黄同位体 / 硫化カルボニル / 大気化学モデリング / 人為起源 |
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| Outline of Final Research Achievements |
In FY2022, the COS concentration measuring device (MIRAPico) was adjusted to enable atmospheric observations. Long-term observations were conducted at the forest site and Tsukuba. However, the mirror surface required cleaning because there was a phenomenon that the instrument became unstable due to contamination of the mirror surface. After maintenance, the obtained results were calibrated. We are now preparing to publish a paper summarizing the results of our observations.
The oxidation process of carbon disulfide (CS2), which is the origin of COS, was studied using a 1D model. As a result, it was clarified that UV-A ultraviolet light causes photoexcitation reaction of CS2 in the lower troposphere, and the oxidation process from CS2 to OCS, which has not been considered in model studies, has been submitted to JGR (Atmosphere) in the form of a paper, which is currently under review.
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| Free Research Field |
大気化学
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| Academic Significance and Societal Importance of the Research Achievements |
最も不確実性の高い日本付近においてCOS濃度と硫黄同位体比の観測を実施し、日本がCOS濃度のホットスポットである原因が人為由来である他、COS濃度の連続測定を可能とすることで、短期的なCOS変動要因の解析を行なった。今後モデルシュミレーションに加える際の境界条件として用いることができる。
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