Cloud condensation nuclei activation of monoterpene and sesquiterpene secondary organic aerosol
Kara E. Huff Hartz,Thomas Rosenørn,Shaun R. Ferchak,Timothy M. Raymond,Merete Bilde,Neil M. Donahue,Spyros N. Pandis,Spyros N. Pandis +7 more
TLDR
In this paper, the ability of biogenic secondary organic aerosol (SOA) to contribute to the concentration of cloud condensation nuclei (CCN) in the atmosphere is examined.Abstract:
[1] The ability of biogenic secondary organic aerosol (SOA) to contribute to the concentration of cloud condensation nuclei (CCN) in the atmosphere is examined. Aerosol is generated by the ozonolysis reaction of monoterpenes (α-pinene, β-pinene, 3-carene, and limonene) and sesquiterpenes (β-caryophyllene, α-humulene, and o-cedrene) in a 10 m 3 temperature-controlled Teflon smog chamber. In some cases, a self-seeding technique is used, which enables high particle concentrations with the desired diameters without compromising particle composition and purity. The monoterpene SOA is excellent CCN material, and it activates similarly (average activation diameter equals 48 ± 8 nm at 1% supersaturation for the species used in this work) to highly water-soluble organic species. Its effective solubility in water was estimated to be in the range of 0.07- 0.40 g solute/g H 2 O. CCN measurements for sesquiterpene SOA (average activation diameter equals 120 ± 20 nm at 1% supersaturation for the species used in this work) show that it is less CCN active than monoterpene SOA. The initial terpene mixing ratio (between 3 and 100 ppb) does not affect the CCN activation for freshly generated SOA.read more
Citations
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A single parameter representation of hygroscopic growth and cloud condensation nucleus activity
TL;DR: In this paper, a method to describe the relationship between particle dry diameter and cloud condensation activity using a single hygroscopicity parameter is presented. But this method is limited to single and multi-component particles with varying amounts of inorganic, organic and surface active compounds.
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Aging of Organic Aerosol: Bridging the Gap Between Laboratory and Field Studies
TL;DR: Data suggest that although matrix effects identified in the laboratory have taken a step toward reconciling laboratory-field disagreements, further work is needed to understand the actual aging rates of organics in ambient particles.
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Hygroscopic properties of submicrometer atmospheric aerosol particles measured with H-TDMA instruments in various environments—a review
Erik Swietlicki,H.-C. Hansson,Kaarle Hämeri,Birgitta Svenningsson,A. Massling,Gordon McFiggans,Peter H. McMurry,Tuukka Petäjä,Tuukka Petäjä,Peter Tunved,Martin Gysel,David Topping,Ernest Weingartner,Urs Baltensperger,Jenny Rissler,A. Wiedensohler,Markku Kulmala +16 more
TL;DR: In this article, the authors summarized the existing published H-TDMA results on the size-resolved submicrometre aerosol particle hygroscopic properties obtained from ground-based measurements at multiple marine, rural, urban and free tropospheric measurement sites.
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A single parameter representation of hygroscopic growth and cloud condensation nucleus activity – Part 3: Including surfactant partitioning
TL;DR: In this article, a hybrid model that accounts for partitioning between the bulk and surface phases in the context of single parameter representations of cloud condensation nucleus activity is introduced, which allows users of the single parameter model to account for surfactant partitioning by applying minor modifications to existing code.
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Viscosity of α-pinene secondary organic material and implications for particle growth and reactivity
Lindsay Renbaum-Wolff,James W. Grayson,Adam P. Bateman,Mikinori Kuwata,Mathieu Sellier,Benjamin J. Murray,John E. Shilling,Scot T. Martin,Allan K. Bertram +8 more
TL;DR: In this paper, the viscosity of the water-soluble component of secondary organic material (SOM) produced by α-pinene ozonolysis is quantified for 20- to 50-μm particles at 293-295 K.
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