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Vehicular exhaust contributions to high NH3 and PM2.5 concentrations during winter in Tokyo, Japan

http://hdl.handle.net/2237/00030589
ab2a16ec-70fc-41a2-aa36-7c36c8362f5a
名前 / ファイル ライセンス アクション
Osada_Vehicular_exhaust_contributions.pdf
Item type 学術雑誌論文 / Journal Article(1)
公開日 2019年08月09日
タイトル
タイトル Vehicular exhaust contributions to high NH3 and PM2.5 concentrations during winter in Tokyo, Japan
言語 en
著者

× Osada, Kazuo

WEKO 92911

en Osada, Kazuo

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× Saito, Shinji

WEKO 92912

en Saito, Shinji

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× Tsurumaru, Hiroshi

WEKO 92913

en Tsurumaru, Hiroshi

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× Hoshi, Junya

WEKO 92914

en Hoshi, Junya

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アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利
言語 en
権利情報 © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
抄録
内容記述タイプ Abstract
内容記述 Concentrations of PM2.5 in Tokyo, a densely populated megacity, often increase because of NH4NO3 formation under low-wind conditions during winter. To obtain source information of NH3 as a NH4NO3 precursor, hourly NH3 and NH4^+ concentrations were measured at an urban site in Tokyo in December 2017. Results show that PM2.5 and NH4^+ concentrations increased simultaneously under low-wind and low-temperature conditions along with NH3, NOx, CO, and optical black carbon (OBC) concentrations. The remaining NH4^+ (herein, ΔNH4^+) subtracted from observed NH4^+ to equivalent SO4^2− concentration correlated well with NO3^− in PM2.5, indicating the existence of fine NH4NO3 particles. Regression analysis of hourly NH3 + ΔΝH4^+ concentrations with CO, NOx, and OBC showed significant correlation. Virtual emission rates (VER) of NH3 per motor vehicle in Tokyo were estimated using observed relations between NH3 + ΔΝH4^+ and OBC, etc. with data from vehicular statistics: they were 3.7–32 mg/km. The regression of NH3 + ΔΝH4^+ with OBC concentrations indicated an intercept of about 3.2 ppb, which is about half of the monthly average in December. This result implies that the non-vehicular source strength was nearly the same strength as the bulk vehicular emissions of NH3 during winter in Tokyo.
言語 en
内容記述
内容記述タイプ Other
内容記述 ファイル公開:2021年06月01日
言語 ja
出版者
出版者 Elsevier
言語 en
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ AM
出版タイプResource http://purl.org/coar/version/c_ab4af688f83e57aa
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1016/j.atmosenv.201903008
ISSN(print)
収録物識別子タイプ PISSN
収録物識別子 1352-2310
書誌情報 en : Atmospheric Environment

巻 206, p. 218-224, 発行日 2019年06月01日
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