Surface-active organic matter induces salt morphology transitions during new atmospheric particle formation and growth

RSC Advances ◽  
2015 ◽  
Vol 5 (78) ◽  
pp. 63240-63251 ◽  
Author(s):  
Vangelis Daskalakis ◽  
Fevronia Charalambous ◽  
Constantinos Demetriou ◽  
Georgia Georgiou
Keyword(s):  
Organic Matter ◽  
Water Uptake ◽  
Particle Formation ◽  
Atmospheric Particle ◽  
Active Organic Matter ◽  
Surface Active ◽  
Particle Formation And Growth

The salt within an aerosol nucleus assumes a brine morphology in increasing presence of organic matter on the surface. This affects, in turn, the water uptake dynamics.

Effects of surface-active organic matter on carbon dioxide nucleation in atmospheric wet aerosols: a molecular dynamics study

2014 ◽  
Vol 16 (43) ◽  
pp. 23723-23734 ◽  
Author(s):  
Vangelis Daskalakis ◽  
Fevronia Charalambous ◽  
Fostira Panagiotou ◽  
Irene Nearchou
Keyword(s):  
Carbon Dioxide ◽  
Molecular Dynamics ◽  
Organic Matter ◽  
Active Organic Matter ◽  
Surface Active

scholarly journals Atmospheric particle formation events at Värriö measurement station in Finnish Lapland 1998-2002

2004 ◽  
Vol 4 (7) ◽  
pp. 2015-2023 ◽  
Author(s):  
H. Vehkamäki ◽  
M. Dal Maso ◽  
T. Hussein ◽  
R. Flanagan ◽  
A. Hyvärinen ◽  
...  
Keyword(s):  
Growth Rate ◽  
Formation Rate ◽  
Particle Formation ◽  
Meteorological Conditions ◽  
Trace Gas ◽  
Air Masses ◽  
Atmospheric Particle ◽  
Starting Time ◽  
Finnish Lapland ◽  
Particle Formation And Growth

Abstract. During the calendar years 1998-2002, 147 clear 8nm diameter particle formation events have been identified at the SMEAR I station in Värriö, northern Finland. The events have been classified in detail according to the particle formation rate, growth rate, event starting time, different trace gas concentrations and pre-existing particle concentrations as well as various meteorological conditions. The frequency of particle formation and growth events was highest during the spring months between March and May, suggesting that increasing biological activity might produce the precursor gases for particle formation. The apparent 8nm particle formation rates were around 0.1 /cm3s, and they were uncorrelated with growth rates that varied between 0.5 and 10nm/h. The air masses with clearly elevated sulphur dioxide concentrations (above 1.6ppb) came, as expected, from the direction of the Nikel and Monschegorsk smelters. Only 15 formation events can be explained by the pollution plume from these sources.

Interaction of cadmium and copper with surface-active organic matter and complexing ligands released by marine phytoplankton

1989 ◽  
Vol 26 (4) ◽  
pp. 313-330 ◽  
Author(s):  
Zlatica Kozarac ◽  
Marta Plavŝić ◽  
Boẑena Ćosović ◽  
Damir Viliĉić
Keyword(s):  
Organic Matter ◽  
Marine Phytoplankton ◽  
Active Organic Matter ◽  
Surface Active

Connection of organics to atmospheric new particle formation and growth at an urban site of Beijing

2015 ◽  
Vol 103 ◽  
pp. 7-17 ◽  
Author(s):  
Z.B. Wang ◽  
M. Hu ◽  
X.Y. Pei ◽  
R.Y. Zhang ◽  
P. Paasonen ◽  
...  
Keyword(s):  
Particle Formation ◽  
Urban Site ◽  
New Particle Formation ◽  
Particle Formation And Growth

scholarly journals A model for particle formation and growth in the atmosphere with molecular resolution in size

2002 ◽  
Vol 2 (5) ◽  
pp. 1791-1807 ◽  
Author(s):  
K. E. J. Lehtinen ◽  
M. Kulmala
Keyword(s):  
Growth Rate ◽  
Atmospheric Aerosol ◽  
Aerosol Particles ◽  
Slight Modification ◽  
Particle Formation ◽  
Simulation Methods ◽  
Discrete Method ◽  
Condensational Growth ◽  
Particle Formation And Growth ◽  
Diffusion Problems

Abstract. The formation and growth of atmospheric aerosol particles is considered using an exact discrete method with molecular resolution in size space. The method is immune to numerical diffusion problems that are a nuisance for typical simulation methods using a sectional representation for the particle size distribution. For condensational growth, a slight modification is proposed for the Fuchs-Sutugin expression, which improves the prediction of the growth rate of nano-sized particles by as much as a factor of two. The presented method is applied to particle formation in a Finnish Boreal forest and is shown to capture the essential features of the dynamics quite nicely. Furthermore, it is shown that the growth of the particles is roughly linear, which means that the amount of condensable vapour is constant (of the order 1013 1/m3).

scholarly journals Particle formation and growth at five rural and urban sites

2010 ◽  
Vol 10 (5) ◽  
pp. 11615-11657 ◽  
Author(s):  
C.-H. Jeong ◽  
G. J. Evans ◽  
M. L. McGuire ◽  
R. Y.-W. Chang ◽  
J. P. D. Abbatt ◽  
...  
Keyword(s):  
Ultrafine Particle ◽  
Particle Formation ◽  
Nucleation And Growth ◽  
Biogenic Emissions ◽  
Traffic Density ◽  
Particle Nucleation ◽  
Size Distributions ◽  
Industrial Sources ◽  
Rural Sites ◽  
Particle Formation And Growth

Abstract. Ultrafine particle (UFP) number and size distributions were simultaneously measured at five urban and rural sites in Southern Ontario, Canada as part of the Border Air Quality and Meteorology Study (BAQS-Met 2007). Particle formation and growth events at these five sites were classified based on their strength and persistence as well as the variation in geometric mean diameter. Regional nucleation and growth events and local short-lived strong nucleation events were frequently observed at the near-border rural sites, upwind of industrial sources. Surprisingly, the particle number concentrations at one of these sites were higher than the concentrations at a downtown site in a major city, despite its high traffic density. Regional nucleation and growth events were favored at intense solar irradiance and less polluted cooler drier air. The most distinctive regional particle nucleation and growth event during the campaign was observed simultaneously at all five sites, which were up to 350 km apart. Although the ultrafine particle concentrations and size distributions generally were spatially heterogeneous across the region, a more uniform spatial distribution of UFP across the five areas was observed during this regional nucleation event. Thus, nucleation events can cover large regions, contributing to the burden of UFP in cities and potentially to the associated health impacts on urban populations. In addition, particle formation in southwestern Ontario appears to more often be related to anthropogenic gaseous emissions, although biogenic emissions may at times contribute. Local short-lived nucleation events at the near-border sites during this three-week campaign were associated with high SO2, which likely originated from US and Canadian industrial sources. These particle formation events may contribute to the production of cloud condensation nuclei, thus potentially influencing regional climate. Longer-term studies are needed to help resolve the relative contributions of anthropogenic and biogenic emissions to nucleation and growth in this region.

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