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Thirteen years of observations on primary sugars and sugar alcohols over remote Chichijima Island in the western North Pacific

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タイトル: Thirteen years of observations on primary sugars and sugar alcohols over remote Chichijima Island in the western North Pacific
著者: Verma, Santosh Kumar 著作を一覧する
Kawamura, Kimitaka 著作を一覧する
Chen, Jing 著作を一覧する
Fu, Pingqing 著作を一覧する
発行日: 2018年 1月 4日
出版者: Copernicus Publications
誌名: Atmospheric Chemistry and Physics
巻: 18
号: 1
開始ページ: 81
終了ページ: 101
出版社 DOI: 10.5194/acp-18-81-2018
抄録: In order to understand the atmospheric transport of bioaerosols, we conducted long-term observations of primary sugars and sugar alcohols over remote Chichijima Island in the western North Pacific from 2001 to 2013. Our results showed that concentrations of total sugar compounds for 13 years ranged from 1.2 to 310 ngm(-3) (average of 46 +/- 49 ngm(-3)). We found that atmospheric circulations significantly affect the seasonal variations of bioaerosol distributions over the western North Pacific. The primary sugars (glucose and fructose) maximized in summer, possibly due to an increased emission of the vegetation products from local vascular plants in Chichijima. We also found higher concentrations of sugar components (arabitol, mannitol, and trehalose) in more recent years during summer and autumn, suggesting an enhanced emission of fungal and microbial species over the island. Sucrose peaked in late winter to early spring, indicating a springtime pollen contribution by long-range atmospheric transport, while elevated concentrations of sucrose in early summer could be explained by long-range transport of soil dust from Southeast Asia to Chichijima. Sucrose and trehalose were found to present increasing trends from 2001 to 2013, while total sugar components did not show any clear trends during the 13-year period. Positive matrix factorization analyses suggested the locally emitted sugar compounds as well as long-range-transported airborne pollen grains, microbes, and fungal spores are the major contributors to total sugar compounds in the Chichijima aerosols. Backward air mass trajectories support the atmospheric transport of continental aerosols from the Asian continent during winter and spring over Chichijima.
資料タイプ: article
URI: http://hdl.handle.net/2115/68479
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 河村 公隆

 

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