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  1. 学術雑誌論文
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Offline analysis of the chemical composition and hygroscopicity of submicrometer aerosol at an Asian outflow receptor site and comparison with online measurements

http://hdl.handle.net/20.500.12000/0002017926
http://hdl.handle.net/20.500.12000/0002017926
761da1b1-469b-4b7e-b93e-7d8b19545d74
名前 / ファイル ライセンス アクション
acp-22-5515-2022.pdf acp-22-5515-2022.pdf (4.4 MB)
Item type 琉球大学リポジトリ登録用アイテムタイプ(1)
公開日 2022-05-12
タイトル
タイトル Offline analysis of the chemical composition and hygroscopicity of submicrometer aerosol at an Asian outflow receptor site and comparison with online measurements
言語 en
作成者 Deng, Yange

× Deng, Yange

en Deng, Yange

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Fujinari, Hiroaki

× Fujinari, Hiroaki

en Fujinari, Hiroaki

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Yai, Hikari

× Yai, Hikari

en Yai, Hikari

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Shimada, Kojiro

× Shimada, Kojiro

en Shimada, Kojiro

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Miyazaki, Yuzo

× Miyazaki, Yuzo

en Miyazaki, Yuzo

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Tachibana, Eri

× Tachibana, Eri

en Tachibana, Eri

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Deshmukh, K. Dhananjay

× Deshmukh, K. Dhananjay

en Deshmukh, K. Dhananjay

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Kawamura, Kimitaka

× Kawamura, Kimitaka

en Kawamura, Kimitaka

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Nakayama, Tomoki

× Nakayama, Tomoki

en Nakayama, Tomoki

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Tatsuta, Shiori

× Tatsuta, Shiori

en Tatsuta, Shiori

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Cai, Mingfu

× Cai, Mingfu

en Cai, Mingfu

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Xu, Hanbing

× Xu, Hanbing

en Xu, Hanbing

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Li, Fei

× Li, Fei

en Li, Fei

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Tan, Haobo

× Tan, Haobo

en Tan, Haobo

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Ohata, Sho

× Ohata, Sho

en Ohata, Sho

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Kondo, Yutaka

× Kondo, Yutaka

en Kondo, Yutaka

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Takami, Akinori

× Takami, Akinori

en Takami, Akinori

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Hatakeyama, Shiro

× Hatakeyama, Shiro

en Hatakeyama, Shiro

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Mochida, Michihiro

× Mochida, Michihiro

en Mochida, Michihiro

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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
権利情報
言語 en
権利情報Resource https://creativecommons.org/licenses/by/4.0/
権利情報 Creative Commons Attribution 4.0 License
権利情報
言語 en
権利情報 © Author(s) 2022
内容記述
内容記述タイプ Abstract
内容記述 Filter-based offline analysis of atmospheric aerosol hygroscopicity coupled to composition analysis provides information complementary to that obtained from online analysis. However, its application itself and comparison to online analysis have remained limited to date. In this study, daily submicrometer aerosol particles (PM0.95, 50 % cutoff diameter 0.95 µm) were collected onto quartz fiber filters on Okinawa Island, a receptor of East Asian outflow, in the autumn of 2015. The chemical composition of water-soluble matter (WSM) in PM0.95, PM0.95 itself, and their respective hygroscopicities were characterized through the offline use of an aerosol mass spectrometer and a hygroscopicity tandem differential mobility analyzer. Thereafter, results were compared with those obtained from online analyses. Sulfate dominated the WSM mass (59 %), followed by water-soluble organic matter (WSOM, 20 %) and ammonium (13 %). WSOM accounted for most (91 %) of the mass of extracted organic matter (EOM) and the atomic O-to-C ratios (O : C) of WSOM and EOM were high (mean ± standard deviation were 0.84 ± 0.08 and 0.78 ± 0.08, respectively), both of which indicate highly aged characteristics of the observed aerosol. The hygroscopic growth curves showed clear hysteresis for most samples. At 85 % relative humidity (RH), the calculated hygroscopicity parameter κ values of the WSM (κWSM), WSOM, EOM, andPM0.95 (κPM0.95 ) were 0.50 ± 0.03, 0.22 ± 0.12, 0.20 ± 0.11, and 0.47 ± 0.03, respectively. An analysis using the thermodynamic Extended Aerosol Inorganics Model (E-AIM) shows, on average, that inorganic salts and WSOM contributed 88 % and 12 %, respectively, of the κWSM (or κPM0.95 ). High similarities were found between offline and online analysis for chemical compositions that are related to particle hygroscopicity (the mass fractions and O : C of organics and the degree of neutralization) and also for aerosol hygroscopicity. As possible factors governing the variation in κWSM, the influences of WSOM abundance and the neutralization of inorganic salts were assessed. At high RH (70 %–90 %), the hygroscopicity of WSM and PM0.95 was affected considerably by the presence of organic components; at low RH (20 %–50 %), the degree of neutralization could be important.This study not only characterized aerosol hygroscopicity at the receptor site of East Asian outflow but also shows that offline hygroscopicity analysis is an appropriate method, at least for aerosols of the studied type. The results encourage further applications to other environments and to more in-depth hygroscopicity analysis, in particular for organic fractions.
言語 en
出版者
言語 en
出版者 European Geosciences Union
出版者
言語 en
出版者 Copernicus Publications
言語
言語 eng
資源タイプ
資源タイプ journal article
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
関連情報
識別子タイプ DOI
関連識別子 https://doi.org/10.5194/acp-22-5515-2022
収録物識別子
収録物識別子タイプ PISSN
収録物識別子 1680-7316
収録物識別子
収録物識別子タイプ EISSN
収録物識別子 1680-7324
収録物名
言語 en
収録物名 Atmospheric Chemistry and Physics
書誌情報
巻 22, 号 8, p. 5515-5533, 発行日 2022-05-02
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