Internal Mixture of Sea Salt, Silicates, and Excess Sulfate in Marine Aerosols

Andreae, Meinrat O.; Charlson, Robert J.; Bruynseels, F.; Storms, H.; Grieken, R. Van; Maenhaut, Willy

doi:10.1126/science.232.4758.1620

Cited by 357 publications

(214 citation statements)

References 15 publications

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“…On the basis of our results, at a RH level of about 80%, the amount of water adsorbed is small compared to the dust particle size; consequently, the light-scattering properties of the dust are not appreciably affected. However, because of the coating of soluble material and the large size of the dust, the particles could become active cloud condensation nuclei at relatively low supersaturations [Andreae et al, 1986;Hobbs, 1993]. Finally, it should be noted that although mineral dust is a "natural" product, the mobilization of dust can be greatly affected by human activities especially in arid areas.…”

Section: Discussionmentioning

confidence: 99%

Effect of relative humidity on light scattering by mineral dust aerosol as measured in the marine boundary layer over the tropical Atlantic Ocean

Li-Jones¹,

Maring²,

Prospero³

1998

J. Geophys. Res.

101

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Section: Discussionmentioning

confidence: 99%

Effect of relative humidity on light scattering by mineral dust aerosol as measured in the marine boundary layer over the tropical Atlantic Ocean

Li-Jones¹,

Maring²,

Prospero³

1998

J. Geophys. Res.

101

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“…These results obtained in the present study could also explain the enrichment of these ions in marine aerosols. [67] The presence of Br À in the subphase disordered the packing of the DPPC alkyl chains; i.e., it would lower the stability of organic films on an aerosol surface, resulting in defect sites in the DPPC monolayer. Experimental studies of water uptake by hydrophobic surfaces suggest that water uptake does indeed occur on these surfaces, preferentially at the defect sites.…”

Section: Atmospheric Implicationsmentioning

confidence: 99%

Impact of anions on the surface organisation of lipid monolayers at the air–water interface

Wang

2017

Environ. Chem.

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Environmental context. Lipids released from lysis of phytoplankton cells are enriched in the sea surface microlayer. Such surface-active organics can be transferred through bursting bubbles to sea-spray aerosols where they can influence atmospheric chemistry. The results presented here suggest that phospholipids combine more readily with SO 4 2À than with Br À , leading to enrichment of organic-coated sulfate salts in marine aerosols.Abstract. Inorganic salts and organic matter are known to be present at higher levels in the sea surface microlayer and marine aerosols; however, the impact of common anions on their surface properties is not well understood. Here, a 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) monolayer was enriched with the sodium and ammonium salts of different anions (Br À , Cl À , NO 3 À , SO 4 2À , CH 3 COO À , and HCO 3 À ), and the effects on the surface properties of the monolayer were investigated. The monolayer phase behaviour and the structure of the lipid phases were studied by surface pressure-area (p-A) isotherms and infrared reflection-absorption spectroscopy (IRRAS). The presence of salts in the subphase was found to increase the surface pressure of the DPPC monolayer at a fixed area per molecule. The effect of the anions follows the order of the Hofmeister series. The higher concentration of salt solution caused the p-A isotherm to shift to larger area. The IRRAS spectra demonstrate that the ordering of the DPPC molecules in the liquid condensed phase remains essentially unaffected, even at higher electrolyte concentrations. DPPC molecules combined with SO 4 2À could be transferred from the ocean to sea spray aerosol. The present study finds that the anions have significant influence on the surface organisation and, consequently, the interfacial properties, of the surface-active species at the air-water interface, a finding that has further implications for atmospheric aerosol nucleation.

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“…Andreae et al (1986) reported that dust particles mixed internally with sea salt were collected in the atmosphere over the equatorial Pacific Ocean. Parungo et al (1986) collected some Saharan dust particles over the Atlantic Ocean containing a sea-salt component.…”

Section: Introductionmentioning

confidence: 99%

Formation of Asian Dust-Storm Particles Mixed Internally with Sea Salt in the Atmosphere

Niimura

Okada²,

Fan

et al. 1998

Journal of the Meteorological Society of Japan

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In the spring of 1991, individual aerosol particles were collected on electron microscopic grids in Beijing (China) and Nagasaki (Japan). In order to study the change in the chemical composition of Asian duststorm particles during transport, the dust particles were examined using an electron microscope equipped with an energy-dispersive X-ray (EDX) analyzer. An isentropic backward-trajectory analysis was carried out in order to obtain the transport path of the dust-storm particles. Spatial distributions of clouds by the Geostationary Meteorological Satellite (GMS) were also used in order to examine the presence of clouds along the transport path.Asian dust-storm particles mixed internally with sea salt (mixed particles) ranged from 16 to 100% among the dust particles in the air over Nagasaki. For the two cases that the same dust-storm events were observed in Beijing and Nagasaki, dust-storm particles containing sea salt were present abundantly in Nagasaki in a case that the air would have been influenced largely by clouds in the maritime atmosphere during the transport. It is suggested that these mixed dust-storm particles were formed by cloud processes.

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Internal Mixture of Sea Salt, Silicates, and Excess Sulfate in Marine Aerosols

Cited by 357 publications

References 15 publications

Effect of relative humidity on light scattering by mineral dust aerosol as measured in the marine boundary layer over the tropical Atlantic Ocean

Effect of relative humidity on light scattering by mineral dust aerosol as measured in the marine boundary layer over the tropical Atlantic Ocean

Impact of anions on the surface organisation of lipid monolayers at the air–water interface

Formation of Asian Dust-Storm Particles Mixed Internally with Sea Salt in the Atmosphere

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