Relationship between aerosol oxidation level and hygroscopic properties of laboratory generated secondary organic aerosol (SOA) particles

被引：225

作者：

Massoli, P. ^{[1
]}

Lambe, A. T. ^{[1
,2
]}

Ahern, A. T. ^{[1
,2
]}

Williams, L. R. ^{[1
]}

Ehn, M. ^{[3
]}

Mikkila, J. ^{[3
]}

Canagaratna, M. R. ^{[1
]}

Brune, W. H. ^{[4
]}

Onasch, T. B. ^{[1
]}

Jayne, J. T. ^{[1
]}

Petaja, T. ^{[3
]}

Kulmala, M. ^{[3
]}

Laaksonen, A. ^{[5
]}

Kolb, C. E. ^{[1
]}

Davidovits, P. ^{[2
]}

Worsnop, D. R. ^{[1
,3
,5
]}

机构：

[1] Aerodyne Res Inc, Billerica, MA 01821 USA

[2] Boston Coll, Dept Chem, Chestnut Hill, MA 02467 USA

[3] Univ Helsinki, Dept Phys, Div Atmospher Sci, FI-00014 Helsinki, Finland

[4] Penn State Univ, Dept Meteorol, University Pk, PA 16802 USA

[5] Univ Eastern Finland, Div Phys, FI-70211 Kuopio, Finland

来源：

GEOPHYSICAL RESEARCH LETTERS | 2010年 / 37卷

基金：

美国国家科学基金会; 芬兰科学院; 欧洲研究理事会;

关键词：

SINGLE-PARAMETER REPRESENTATION; CONDENSATION NUCLEUS ACTIVITY; MASS-SPECTROMETER; HIGH-RESOLUTION; CHEMICAL-COMPOSITION; GROWTH-KINETICS; CCN ACTIVITY; INTEX-B; ACTIVATION; GAP;

D O I：

10.1029/2010GL045258

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Laboratory experiments investigated the relationship between oxidation level and hygroscopic properties of secondary organic aerosol (SOA) particles generated via OH radical oxidation in an aerosol flow reactor. The hygroscopic growth factor at 90% RH (HGF(90%)), the CCN activity (kappa(ORG,CCN)) and the level of oxidation (atomic O:C ratio) of the SOA particles were measured. Both HGF(90%) and kappa(ORG,CCN) increased with O:C; the HGF(90%) varied linearly with O:C, while kappa(ORG,CCN) mostly followed a nonlinear trend. An average HGF(90%) of 1.25 and kappa(ORG),(CCN) of 0.19 were measured for O:C of 0.65, in agreement with results reported for ambient data. The kappa(ORG) values estimated from the HGF(90%) (kappa(ORG,HGF)) were 20 to 50% lower than paired kappa(ORG),(CCN) values for all SOA particles except 1,3,5-trimethylbenzene (TMB), the least hygroscopic of the SOA systems. Within the limitations of instrumental capabilities, we show that differences in hygroscopic behavior among the investigated SOA systems may correspond to differences in elemental composition. Citation: Massoli, P., et al. (2010), Relationship between aerosol oxidation level and hygroscopic properties of laboratory generated secondary organic aerosol (SOA) particles, Geophys. Res. Lett., 37, L24801, doi:10.1029/2010GL045258.

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