直近一年間の累計
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ID 116935
著者
Tomiyasu, Naoya Tokushima University
Namikawa, Makoto Tokushima University
Toda, Kei Kumamoto University
Katsumi, Naoya Ishikawa Prefectural University
Okochi, Hiroshi Waseda University
キーワード
Acidic gases
Particulate anions
Free troposphere
High-time resolution
Free-standing mountain
資料タイプ
学術雑誌論文
抄録
Atmospheric gaseous and particulate pollutants emitted from local or regional sources cause transboundary air pollution. To better understand this environmental issue, it is useful to monitor the free troposphere, reflecting the global air quality, with high temporal resolution. During the summer of 2016, we operated an original on-line monitor on the summit of Mt. Fuji, Japan (3776 m a.s.l.) to measure water-soluble acidic gases and particulate anions in the free troposphere. Mt. Fuji is a free-standing mountain and, therefore, hardly affected by air pollutants emitted from the local region. The lab-made gas/particle collector coupled ion chromatograph successfully provided meaningful data on an hourly basis. The average concentrations of HNO3, SO2, NO3-, and SO42- (n = 64 each) were, respectively 1.8 ± 0.9, 2.3 ± 2.5, 0.22 ± 0.16, and 3.9 ± 2.6 nmol m-3. The gaseous HNO3 was the predominant form compared to particulate NO3-. For the sulfur component, the percentage of particulate form was higher than that of the gaseous one. The high time-resolution monitoring enabled us to classify the observed data based on the air parcel inflow direction to the sampling point even when it changed dramatically. As a result, the oxidation of SO2 to SO42- in atmospheric transport can be discussed for each air parcel. It was suggested that the SO2 oxidation was enhanced in the air parcels that passed over the Asian Continent.
掲載誌名
Atmospheric Environment
ISSN
13522310
cat書誌ID
AA10990709
AA11522058
出版者
Elsevier
273
開始ページ
118977
発行日
2022-01-29
備考
論文本文は2024-01-29以降公開予定
権利情報
© 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
EDB ID
出版社版DOI
出版社版URL
言語
eng
著者版フラグ
その他
部局
薬学系