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ID 118162
著者
Nakagawa, Shinya Tokushima University
Watanabe, Hiroki Tokushima University
Isobe, Takaharu Waseda University
Ogata, Hiroko Waseda University
Okochi, Hiroshi Waseda University
キーワード
Long-range transportation
Mt. Fuji
Near-real-time monitor
Sakurajima volcano
Wet denuder
資料タイプ
学術雑誌論文
抄録
Mountain observatories at high altitudes, far from local anthropogenic emission sources, are considered ideal for monitoring temporal variations of tropospheric air pollutants. During August 17–21 in 2013, we measured sulfur dioxide and nitric acid concentrations in the free troposphere at the top (3776 m a.s.l.) of Mt. Fuji, Japan. A parallel plate wet denuder-ion chromatographic system was used for the online measurement with 15 min temporal resolution. The continuous observations were successfully achieved without any problems. Of the samples collected, 97.8% of sulfur dioxide and 75.7% of nitric acid were above the limits of quantification. The average gas concentrations ± standard deviation (n = 408) were 0.106 ± 0.377 ppbv for sulfur dioxide and 0.015 ± 0.014 ppbv for nitric acid, respectively. Episodic elevations of sulfur dioxide concentration were recorded from August 20 to 21. Backward trajectory analyses indicated that the high-temporal resolution monitor detected the volcanic sulfur dioxide from Mt. Sakurajima, located 857 km from the sampling point. High-time-resolved observations in the free troposphere proved useful for source identification of air pollutants.
掲載誌名
Atmospheric Environment: X
ISSN
25901621
出版者
Elsevier
18
開始ページ
100213
発行日
2023-03-09
権利情報
This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
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言語
eng
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出版社版
部局
薬学系