Effect of solute dissolution kinetics on cloud droplet formation: Extended Köhler theory

Asa-Awuku, Akua; Nenes, Athanasios

doi:10.1029/2005jd006934

Cited by 60 publications

(46 citation statements)

References 33 publications

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“…In a comprehensive review, Graber and Rudich (2006) concluded that, although it is difficult to distinguish atmospheric HULIS from terrestrial and aquatic humic substances on a chemical level, there are significant differences in physical properties such as hygroscopicity and CCN activity. This has been substantiated in a series of studies on the microphysical properties of HULIS extracted from real aerosol samples (Dinar et al, 2006a(Dinar et al, , b, 2007Asa-Awuku and Nenes, 2007;Taraniuk et al, 2007;Wex et al, 2007). There is indication that HULIS can be of primary origin, e.g., wood combustion, but may also be associated with secondary particle-phase production (Gelencsér et al, 2002;Samburova et al, 2005a, b;Feczko et al, 2007;Surratt et al, 2007aSurratt et al, , 2008.…”

Section: Analysis Of High Molecular Weight Compoundsmentioning

confidence: 88%

The formation, properties and impact of secondary organic aerosol: current and emerging issues

et al. 2009

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Abstract. Secondary organic aerosol (SOA) accounts for a significant fraction of ambient tropospheric aerosol and a detailed knowledge of the formation, properties and transformation of SOA is therefore required to evaluate its impact on atmospheric processes, climate and human health. The chemical and physical processes associated with SOA formation are complex and varied, and, despite considerable progress in recent years, a quantitative and predictive understanding of SOA formation does not exist and therefore represents a major research challenge in atmospheric science. This review begins with an update on the current state of knowledge on the global SOA budget and is followed by an overview of the atmospheric degradation mechanisms for SOA precursors, gas-particle partitioning theory and the analytical techniques used to determine the chemical composition of SOA. A survey of recent laboratory, field and modeling studies is also presented. The following topical and emerging issues are highlighted and discussed in detail: molecular characterization of biogenic SOA constituents, condensed phase reactions and oligomerization, the interaction of atmospheric organic components with sulfuric acid, the chemical and photochemical processing of organics in the atmospheric aqueous phase, aerosol formation from real plant emissions, interaction of atmospheric organic components with water, thermodynamics and mixtures in atmospheric models. Finally, the major challenges ahead in laboratory, field and modeling studies of SOA are discussed and recommendations for future research directions are proposed.

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Section: Analysis Of High Molecular Weight Compoundsmentioning

confidence: 88%

The formation, properties and impact of secondary organic aerosol: current and emerging issues

et al. 2009

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“…The maximum allowed reduction in σ s is consistent with surface tension measurements of atmospherically relevant organics at relatively dilute solutions (Shulman et al, 1996;Facchini et al, 2000;Tuckermann and Cammenga, 2004;Hyvärinen et al, 2006;Salma et al, 2006;Svenningsson et al, 2006). It should be noted that surface tension is a dynamic parameter which depends on the particle size and relative humidity (Ervens et al, 2005;Asa-Awuku and Nenes, 2007;Dinar et al, 2006). We have assumed, however, that the value of σ s is constant during a model run, i.e.…”

Section: Performed Sensitivity Studiesmentioning

confidence: 99%

On the contribution of Aitken mode particles to cloud droplet populations at continental background areas – a parametric sensitivity study

Anttila

Kerminen

2007

Atmos. Chem. Phys.

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Abstract. Aitken mode particles are potentially an important source of cloud droplets in continental background areas. In order to find out which physico-chemical properties of Aitken mode particles are most important regarding their cloud-nucleating ability, we calculated the number of cloud droplets formed on Aitken mode particles, CD 2 , with an adiabatic air parcel model. The model output was analyzed using a global sensitivity analysis method that quantifies and ranks the relative importance of the considered input parameters to the total variance of CD 2 . The results show that unless the particle surface tension or the mass accommodation coefficient of water is strongly reduced due to the presence of surface-active organics, the parameters describing the size distribution are generally more important than the particle chemical composition. In the absence of such compounds, the chemical composition may have roughly an equal importance with the size distribution only at low updraft velocities characterized by maximum supersaturations below 0.1%. Furthermore, the largest source of variability is generally the particle number concentration, followed by the particle size. The performed sensitivity analysis revealed that the variability of the particle chemical composition may dominate the total variation of CD 2 if: 1) the value of α varies at least one order of magnitude more than what is expected for pure water surfaces (10 −2 -1), or 2) the particle surface tension varies more than roughly 30% under conditions close to reaching saturation.

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“…Recent work has shown that kinetic limitations, including surface films and slow dissolution of particulate substances, can suppress droplet growth (Asa-Awuku and Nenes, 2007;Ruehl et al, 2008). With few exceptions including solute being physically "trapped" within some type of waxy material, dissolution kinetics is governed by diffusion of solute from the solid "core" at the center of a droplet to the growing droplet.…”

Section: Estimated Subsaturated Hygroscopic Growth Factors For the Ormentioning

confidence: 99%

“…With few exceptions including solute being physically "trapped" within some type of waxy material, dissolution kinetics is governed by diffusion of solute from the solid "core" at the center of a droplet to the growing droplet. It has been argued that the latter process is slow enough for compounds with high molecular weights to influence droplet growth kinetics and the Köhler curve (AsaAwuku and Nenes, 2007;Taraniuk et al, 2007;Moore et al, 2008). According to Fig.…”

Section: Estimated Subsaturated Hygroscopic Growth Factors For the Ormentioning

confidence: 99%

Comprehensive airborne characterization of aerosol from a major bovine source

et al. 2008

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Abstract. We report an extensive airborne characterization of aerosol downwind of a massive bovine source in the San Joaquin Valley (California) on two flights during July 2007. The Center for Interdisciplinary Remotely-Piloted Aircraft Studies (CIRPAS) Twin Otter probed chemical composition, particle size distribution, mixing state, sub-and supersaturated water uptake behavior, light scattering properties, and the interrelationship between these parameters and meteorology. Total PM 1.0 levels and concentrations of organics, nitrate, and ammonium were enhanced in the plume from the source as compared to the background aerosol. Organics dominated the plume aerosol mass (∼56-64%), followed either by sulfate or nitrate, and then ammonium. Particulate amines were detected in the plume aerosol by a particleinto-liquid sampler (PILS) and via mass spectral markers in the Aerodyne C-ToF-AMS. Amines were found to be a significant atmospheric base even in the presence of ammonia; particulate amine concentrations are estimated as at least 14-23% of that of ammonium in the plume. Enhanced sub-and supersaturated water uptake and reduced refractive indices were coincident with lower organic mass fractions, higher nitrate mass fractions, and the detection of amines. The likelihood of suppressed droplet growth owing to kinetic limitations from hydrophobic organic material is explored. After removing effects associated with size distribution and mixing state, the normalized activated fraction of cloud condensation nuclei (CCN) increased as a function of the subsaturated Correspondence to: J. H. Seinfeld (seinfeld@caltech.edu) hygroscopic growth factor, with the highest activated fractions being consistent with relatively lower organic mass fractions and higher nitrate mass fractions. Subsaturated hygroscopic growth factors for the organic fraction of the aerosol are estimated based on employing the ZdanovskiiStokes Robinson (ZSR) mixing rule. Representative values for a parameterization treating particle water uptake in both the sub-and supersaturated regimes are reported for incorporation into atmospheric models.

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Effect of solute dissolution kinetics on cloud droplet formation: Extended Köhler theory

Cited by 60 publications

References 33 publications

The formation, properties and impact of secondary organic aerosol: current and emerging issues

The formation, properties and impact of secondary organic aerosol: current and emerging issues

On the contribution of Aitken mode particles to cloud droplet populations at continental background areas – a parametric sensitivity study

Comprehensive airborne characterization of aerosol from a major bovine source

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