表題番号：2022C-204
日付：2023/02/10
研究課題所沢における大気中ペルオキシアシルナイトレート全量の観測事例の蓄積（２）
| 研究者所属（当時） | 資格 | 氏名 | |
|---|---|---|---|
| （代表者） | 人間科学学術院 人間科学部 | 教授 | 松本 淳 |
- 研究成果概要
- Photochemical oxidant, Ox, is one of the most important issues on air pollution. In spite of reduction of precursors like NOx and VOCs, the concentration level of Ox has been still flat. It is urgent to grasp current situations on Ox in detail and to suggest more effective control plans. Ox is composed mainly of ozone, O3. In Japan, constant monitoring of Ox is based on measurements of ozone concentrations. Peroxyacyl nitrates, PANs, are considered second to O3 as major compounds as Ox. However, ozone monitoring cannot reflect the contributions of PANs to Ox. To capture situations on Ox more precisely, it is necessary to consider PANs’ contributions. In this study, examples of simultaneous observations on PANs and O3 were accumulated as possible and correlation analysis between PANs and O3 were conducted preliminarily in order to study fractions of PANs and O3 in Ox in detail. The observations has been conducted after June 9th in 2021 at Tokorozawa Campus, Waseda University. The site was placed ca. 30km to the northwest of downtown Tokyo and surrounded by forests. Thus, the campus was suitable for studying Ox in suburban areas around Tokyo. Consequently, especially in daytime of summer, PANs were correlated to PO (=O3+NO2). When temperature was high and the ratio NOx/VOCs was low, high Ox cases with high PO and PANs could be captured.