The organic fraction of bubble-generated, accumulation mode Sea Spray Aerosol (SSA)

Modini, Robin L.; Harris, Bethan L.; Ristovski, Zoran

doi:10.5194/acpd-9-21399-2009

Cited by 20 publications

(55 citation statements)

References 44 publications

(18 reference statements)

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“…A similarly stable volatility behavior is observed in other studies (e.g. Modini et al 2010). The plot of NaCl shows also the high precision of the instrument with less than ±2 % for VFR in a wide temperature range.…”

Section: V/h-tdma Instrumentsupporting

confidence: 62%

Volatility and hygroscopicity of aging secondary organic aerosol in a smog chamber

et al. 2011

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Abstract. The evolution of secondary organic aerosols (SOA) during (photo-)chemical aging processes was investigated in a smog chamber. Fresh SOA from ozonolysis of 10 to 40 ppb α-pinene was formed followed by aging with OH radicals. The particles' volatility and hygroscopicity (expressed as volume fraction remaining (VFR) and hygroscopicity parameter κ) were measured in parallel with a volatility and hygroscopicity tandem differential mobility analyzer (V/H-TDMA). An aerosol mass spectrometer (AMS) was used for the chemical characterization of the aerosol. These measurements were used as sensitive parameters to reveal the mechanisms possibly responsible for the changes in the SOA composition during aging. A change of VFR and/or κ during processing of atmospheric aerosols may occur either by addition of SOA mass (by condensation) or by a change of SOA composition leading to different aerosol properties. The latter may occur either by heterogeneous reactions on the surface of the SOA particles, by condensed phase reactions like oligomerization or by an evaporation -gas-phase oxidation -recondensation cycle. The condensation mechanism showed to be dominant when there is a substantial change in the aerosol mass by addition of new molecules to the aerosol phase with time. Experiments could be divided into four periods based on the temporal evolution (qualitative changes) of VFR, κ and organic mass: O 3 induced condensation, ripening, and OH induced chemical aging first with substantial mass gain and then without significant mass gain.Correspondence to: E. Weingartner (ernest.weingartner@psi.ch) During the O 3 induced condensation the particles' volatility decreased (increasing VFR) while the hygroscopicity increased. Thereafter, in the course of ripening volatility continued to decrease, but hygroscopicity stayed roughly constant. After exposing the SOA to OH radicals an OH induced chemical aging with substantial mass gain started resulting in the production of at least 50 % more SOA mass. This new SOA mass was highly volatile and oxidized. This period was then followed by further OH induced chemical aging without significant mass gain leading to a decrease of volatility while hygroscopicity and SOA mass stayed roughly constant.

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Section: V/h-tdma Instrumentsupporting

confidence: 62%

Volatility and hygroscopicity of aging secondary organic aerosol in a smog chamber

et al. 2011

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“…S6), confirming suggestions from previous studies (O 'Dowd et al, 2004;Keene et al, 2007;Facchini et al, 2008;Modini et al, 2010).…”

Section: Free Amino Acids (Aa) In Pm 10supporting

confidence: 82%

Aerosol and snow transfer processes: An investigation on the behavior of water-soluble organic compounds and ionic species

et al. 2017

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h i g h l i g h t sThe air-snow transfer processes were evaluated using water soluble compounds. This is the first study about amino acids and sugar concentration in surface snow. Water soluble organic fractions of Antarctic aerosol and snow were investigated. a r t i c l e i n f o b s t r a c tThe concentrations of water-soluble compounds (ions, carboxylic acids, amino acids, sugars, phenolic compounds) in aerosol and snow have been determined at the coastal Italian base "Mario Zucchelli" (Antarctica) during the 2014e2015 austral summer. The main aim of this research was to investigate the air-snow transfer processes of a number of classes of chemical compounds and investigate their potential as tracers for specific sources.The composition and particle size distribution of Antarctic aerosol was measured, and water-soluble compounds accounted for 66% of the PM 10 total mass concentration. The major ions Na þ , Mg 2þ , Cl À and SO 4 2À made up 99% of the total water soluble compound concentration indicating that sea spray input was the main source of aerosol. These ionic species were found mainly in the coarse fraction of the aerosol resulting in enhanced deposition, as reflected by the snow composition. Biogenic sources were identified using chemical markers such as carboxylic acids, amino acids, sugars and phenolic compounds. This study describes the first characterization of amino acids and sugar concentrations in surface snow. High concentrations of amino acids were found after a snowfall event, their presence is probably due to the degradation of biological material scavenged during the snow event. Alcohol sugars increased in concentration after the snow event, suggesting a deposition of primary biological particles, such as airborne fungal spores.

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“…[5] However, the theory fails to account for the even smaller sea spray particles observed in many recent laboratory and ambient studies [Clarke et al, 2006;Fuentes et al, 2010a;Hultin et al, 2010;Keene et al, 2007;Martensson et al, 2003;Modini et al, 2010;Russell and Singh, 2006;Sellegri et al, 2006;Tyree et al, 2007]. Specifically, there is little explanation for the dominant SSA accumulation mode centered at~0.1-0.2 mm dry particle diameter.…”

Section: Introductionmentioning

confidence: 99%

Effect of soluble surfactant on bubble persistence and bubble‐produced aerosol particles

et al. 2013

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[1] The effect of soluble surfactant on the persistence of salt-water bubbles and their ability to produce aerosol particles upon bursting was investigated. Ensembles of individual, millimetric bubbles were produced in NaCl solutions of varying surfactant concentration. Aerosol production efficiency-a fundamental property of single bubbles defined as the number of particles produced per bubble film cap area-decreased by 79% to 98% following the addition of surfactant and increase in solution film pressure from 1-2 to 7-27 mN m À1 . The generated particle size distributions (0.01-10 mm dry diameter) contained up to three modes and did not change much for film pressures up to 13.8 mN m À1 . The persistence of the bubbles at the water surface and the thickness of their film caps were investigated with high-speed videography. Addition of soluble surfactant increased average bubble persistence providing more time for the bubbles to drain and thin out with the aid of marginal regeneration flows. Bubble film cap thicknesses ranged from around 1 mm for relatively clean, short-lived bubbles to less than 0.1 mm for surfactant-stabilized, persistent bubbles. The suppression of aerosol production from the surfactant-stabilized bubbles may have resulted from the dramatic thinning of their caps or reduced surface forces at high film pressure. Previously reported Sea Spray Aerosol source functions were compared to measured aerosol production efficiencies and found to be significantly greater in magnitude, suggesting that there is a source of particles from whitecaps that was not captured in these single-bubble experiments.

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The organic fraction of bubble-generated, accumulation mode Sea Spray Aerosol (SSA)

Cited by 20 publications

References 44 publications

Volatility and hygroscopicity of aging secondary organic aerosol in a smog chamber

Volatility and hygroscopicity of aging secondary organic aerosol in a smog chamber

Aerosol and snow transfer processes: An investigation on the behavior of water-soluble organic compounds and ionic species

Effect of soluble surfactant on bubble persistence and bubble‐produced aerosol particles

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