气候变化领域集成服务门户(CCPortal): Offline analysis of the chemical composition and hygroscopicity of submicrometer aerosol at an Asian outflow receptor site and comparison with online measurements

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DOI	10.5194/acp-22-5515-2022
	Offline analysis of the chemical composition and hygroscopicity of submicrometer aerosol at an Asian outflow receptor site and comparison with online measurements
	Deng, Yange; Fujinari, Hiroaki; Yai, Hikari; Shimada, Kojiro; Miyazaki, Yuzo; Tachibana, Eri; Deshmukh, Dhananjay K.; Kawamura, Kimitaka; Nakayama, Tomoki; Tatsuta, Shiori; Cai, Mingfu; Xu, Hanbing; Li, Fei; Tan, Haobo; Ohata, Sho; Kondo, Yutaka; Takami, Akinori; Hatakeyama, Shiro; Mochida, Michihiro
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	5515
结束页码	5533
卷号	22 期号:8 页码:19
英文摘要	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 mu m) 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 kappa values of the WSM (kwsm), WSOM, EOM, and PM0.95 (kappa pm 095 ) 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 kappa(wsm) (or kappa PM0.95). 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 k wsm, 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.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000789125000001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273890
作者单位	Nagoya University; Nagoya University; Tokyo University of Agriculture & Technology; Hokkaido University; Chubu University; Sun Yat Sen University; China Meteorological Administration; University of Tokyo; Research Organization of Information & Systems (ROIS); National Institute of Polar Research (NIPR) - Japan; National Institute for Environmental Studies - Japan; National Institute for Environmental Studies - Japan; University of the Ryukyus; Nagasaki University; Jinan University; Nagoya University
推荐引用方式 GB/T 7714	Deng, Yange,Fujinari, Hiroaki,Yai, Hikari,et al. Offline analysis of the chemical composition and hygroscopicity of submicrometer aerosol at an Asian outflow receptor site and comparison with online measurements[J],2022,22(8):19.
APA	Deng, Yange.,Fujinari, Hiroaki.,Yai, Hikari.,Shimada, Kojiro.,Miyazaki, Yuzo.,...&Mochida, Michihiro.(2022).Offline analysis of the chemical composition and hygroscopicity of submicrometer aerosol at an Asian outflow receptor site and comparison with online measurements.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(8),19.
MLA	Deng, Yange,et al."Offline analysis of the chemical composition and hygroscopicity of submicrometer aerosol at an Asian outflow receptor site and comparison with online measurements".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.8(2022):19.