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

P. Massoli; A. T. Lambe; A. T. Ahern; L. R. Williams; M. Ehn; J. Mikkilä; M. R. Canagaratna; W. H. Brune; T. B. Onasch; J. T. Jayne; T. Petäjä; M. Kulmala; A. Laaksonen; C. E. Kolb; P. Davidovits; D. R. Worsnop

doi:10.1029/2010GL045258

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

P. Massoli, A. T. Lambe, A. T. Ahern, L. R. Williams, M. Ehn, J. Mikkilä, M. R. Canagaratna, W. H. Brune, T. B. Onasch, J. T. Jayne, T. Petäjä, M. Kulmala, A. Laaksonen, C. E. Kolb, P. Davidovits, D. R. Worsnop

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Abstract

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 (κ_ORG,CCN) and the level of oxidation (atomic O:C ratio) of the SOA particles were measured. Both HGF_90% and κ _ORG,CCN increased with O:C; the HGF_90% varied linearly with O:C, while κ_ORG,CCN mostly followed a nonlinear trend. An average HGF_90% of 1.25 and κ_ORG,CCN of 0.19 were measured for O:C of 0.65, in agreement with results reported for ambient data. The κ_ORG values estimated from the HGF_90% (κ_ORG,HGF) were 20 to 50% lower than paired κ_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.

Original language	English (US)
Article number	L24801
Journal	Geophysical Research Letters
Volume	37
Issue number	24
DOIs	https://doi.org/10.1029/2010GL045258
State	Published - Dec 1 2010

All Science Journal Classification (ASJC) codes

Geophysics
General Earth and Planetary Sciences

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Massoli, P., Lambe, A. T., Ahern, A. T., Williams, L. R., Ehn, M., Mikkilä, J., Canagaratna, M. R., Brune, W. H., Onasch, T. B., Jayne, J. T., Petäjä, T., Kulmala, M., Laaksonen, A., Kolb, C. E., Davidovits, P., & Worsnop, D. R. (2010). Relationship between aerosol oxidation level and hygroscopic properties of laboratory generated secondary organic aerosol (SOA) particles. Geophysical Research Letters, 37(24), Article L24801. https://doi.org/10.1029/2010GL045258

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

abstract = "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 (HGF90%), the CCN activity (κORG,CCN) and the level of oxidation (atomic O:C ratio) of the SOA particles were measured. Both HGF90% and κ ORG,CCN increased with O:C; the HGF90% varied linearly with O:C, while κORG,CCN mostly followed a nonlinear trend. An average HGF90% of 1.25 and κORG,CCN of 0.19 were measured for O:C of 0.65, in agreement with results reported for ambient data. The κORG values estimated from the HGF90% (κORG,HGF) were 20 to 50% lower than paired κORG,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.",

author = "P. Massoli and Lambe, {A. T.} and Ahern, {A. T.} and Williams, {L. R.} and M. Ehn and J. Mikkil{\"a} and Canagaratna, {M. R.} and Brune, {W. H.} and Onasch, {T. B.} and Jayne, {J. T.} and T. Pet{\"a}j{\"a} and M. Kulmala and A. Laaksonen and Kolb, {C. E.} and P. Davidovits and Worsnop, {D. R.}",

year = "2010",

month = dec,

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doi = "10.1029/2010GL045258",

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Massoli, P, Lambe, AT, Ahern, AT, Williams, LR, Ehn, M, Mikkilä, J, Canagaratna, MR, Brune, WH, Onasch, TB, Jayne, JT, Petäjä, T, Kulmala, M, Laaksonen, A, Kolb, CE, Davidovits, P & Worsnop, DR 2010, 'Relationship between aerosol oxidation level and hygroscopic properties of laboratory generated secondary organic aerosol (SOA) particles', Geophysical Research Letters, vol. 37, no. 24, L24801. https://doi.org/10.1029/2010GL045258

TY - JOUR

T1 - Relationship between aerosol oxidation level and hygroscopic properties of laboratory generated secondary organic aerosol (SOA) particles

AU - Massoli, P.

AU - Lambe, A. T.

AU - Ahern, A. T.

AU - Williams, L. R.

AU - Ehn, M.

AU - Mikkilä, J.

AU - Canagaratna, M. R.

AU - Brune, W. H.

AU - Onasch, T. B.

AU - Jayne, J. T.

AU - Petäjä, T.

AU - Kulmala, M.

AU - Laaksonen, A.

AU - Kolb, C. E.

AU - Davidovits, P.

AU - Worsnop, D. R.

PY - 2010/12/1

Y1 - 2010/12/1

N2 - 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 (HGF90%), the CCN activity (κORG,CCN) and the level of oxidation (atomic O:C ratio) of the SOA particles were measured. Both HGF90% and κ ORG,CCN increased with O:C; the HGF90% varied linearly with O:C, while κORG,CCN mostly followed a nonlinear trend. An average HGF90% of 1.25 and κORG,CCN of 0.19 were measured for O:C of 0.65, in agreement with results reported for ambient data. The κORG values estimated from the HGF90% (κORG,HGF) were 20 to 50% lower than paired κORG,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.

AB - 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 (HGF90%), the CCN activity (κORG,CCN) and the level of oxidation (atomic O:C ratio) of the SOA particles were measured. Both HGF90% and κ ORG,CCN increased with O:C; the HGF90% varied linearly with O:C, while κORG,CCN mostly followed a nonlinear trend. An average HGF90% of 1.25 and κORG,CCN of 0.19 were measured for O:C of 0.65, in agreement with results reported for ambient data. The κORG values estimated from the HGF90% (κORG,HGF) were 20 to 50% lower than paired κORG,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.

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U2 - 10.1029/2010GL045258

DO - 10.1029/2010GL045258

M3 - Article

AN - SCOPUS:78650480637

SN - 0094-8276

VL - 37

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 24

M1 - L24801

ER -

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

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