Thermodynamics and kinetics of atmospheric aerosol particle formation and growth

2012 ◽  
Vol 41 (15) ◽  
pp. 5160 ◽  
Author(s):  
Hanna Vehkamäki ◽  
Ilona Riipinen
Keyword(s):  
Aerosol Particle ◽  
Atmospheric Aerosol ◽  
Particle Formation ◽  
Thermodynamics And Kinetics ◽  
Kinetics Of ◽  
Particle Formation And Growth

The kinetics of aerosol particle formation and removal in NPP severe accidents

2016 ◽  
Author(s):  
Mikhail A. Zatevakhin ◽  
Valentin K. Arefiev ◽  
Sergey E. Semashko ◽  
Rostislav A. Dolganov
Keyword(s):  
Aerosol Particle ◽  
Particle Formation ◽  
Severe Accidents ◽  
Kinetics Of

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

2003 ◽  
Vol 3 (1) ◽  
pp. 251-257 ◽  
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 Observations of ultrafine aerosol particle formation and growth in boreal forest

1997 ◽  
Vol 24 (10) ◽  
pp. 1219-1222 ◽  
Author(s):  
J. M. Mäkelä ◽  
P. Aalto ◽  
V. Jokinen ◽  
T. Pohja ◽  
A. Nissinen ◽  
...  
Keyword(s):  
Boreal Forest ◽  
Aerosol Particle ◽  
Particle Formation ◽  
Ultrafine Aerosol ◽  
Particle Formation And Growth

scholarly journals A look at aerosol formation using data mining techniques

2005 ◽  
Vol 5 (12) ◽  
pp. 3345-3356 ◽  
Author(s):  
S. Hyvönen ◽  
H. Junninen ◽  
L. Laakso ◽  
M. Dal Maso ◽  
T. Grönholm ◽  
...  
Keyword(s):  
Data Mining ◽  
Relative Humidity ◽  
Aerosol Particle ◽  
Atmospheric Aerosol ◽  
Particle Surface ◽  
Particle Formation ◽  
High Water Content ◽  
Aerosol Formation ◽  
Data Mining Techniques ◽  
Condensation Sink

Abstract. Atmospheric aerosol particle formation is frequently observed throughout the atmosphere, but despite various attempts of explanation, the processes behind it remain unclear. In this study data mining techniques were used to find the key parameters needed for atmospheric aerosol particle formation to occur. A dataset of 8 years of 80 variables collected at the boreal forest station (SMEAR II) in Southern Finland was used, incorporating variables such as radiation, humidity, SO2, ozone and present aerosol surface area. This data was analyzed using clustering and classification methods. The aim of this approach was to gain new parameters independent of any subjective interpretation. This resulted in two key parameters, relative humidity and preexisting aerosol particle surface (condensation sink), capable in explaining 88% of the nucleation events. The inclusion of any further parameters did not improve the results notably. Using these two variables it was possible to derive a nucleation probability function. Interestingly, the two most important variables are related to mechanisms that prevent the nucleation from starting and particles from growing, while parameters related to initiation of particle formation seemed to be less important. Nucleation occurs only with low relative humidity and condensation sink values. One possible explanation for the effect of high water content is that it prevents biogenic hydrocarbon ozonolysis reactions from producing sufficient amounts of low volatility compounds, which might be able to nucleate. Unfortunately the most important biogenic hydrocarbon compound emissions were not available for this study. Another effect of water vapour may be due to its linkage to cloudiness which may prevent the formation of nucleating and/or condensing vapours. A high number of preexisting particles will act as a sink for condensable vapours that otherwise would have been able to form sufficient supersaturation and initiate the nucleation process.

scholarly journals Multicomponent new particle formation from sulfuric acid, ammonia, and biogenic vapors

2018 ◽  
Vol 4 (12) ◽  
pp. eaau5363 ◽  
Author(s):  
Katrianne Lehtipalo ◽  
Chao Yan ◽  
Lubna Dada ◽  
Federico Bianchi ◽  
Mao Xiao ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Atmospheric Aerosol ◽  
Organic Molecules ◽  
Fossil Fuel ◽  
Particle Formation ◽  
Atmospheric Pollutants ◽  
Fossil Fuel Combustion ◽  
Complex Interactions ◽  
Volatile Organic ◽  
Particle Formation And Growth

A major fraction of atmospheric aerosol particles, which affect both air quality and climate, form from gaseous precursors in the atmosphere. Highly oxygenated organic molecules (HOMs), formed by oxidation of biogenic volatile organic compounds, are known to participate in particle formation and growth. However, it is not well understood how they interact with atmospheric pollutants, such as nitrogen oxides (NOx) and sulfur oxides (SOx) from fossil fuel combustion, as well as ammonia (NH3) from livestock and fertilizers. Here, we show how NOxsuppresses particle formation, while HOMs, sulfuric acid, and NH3have a synergistic enhancing effect on particle formation. We postulate a novel mechanism, involving HOMs, sulfuric acid, and ammonia, which is able to closely reproduce observations of particle formation and growth in daytime boreal forest and similar environments. The findings elucidate the complex interactions between biogenic and anthropogenic vapors in the atmospheric aerosol system.

scholarly journals Sulfur Dioxide Modifies Aerosol Particle Formation and Growth by Ozonolysis of Monoterpenes and Isoprene

2019 ◽  
Vol 124 (8) ◽  
pp. 4800-4811 ◽  
Author(s):  
Christopher M. Stangl ◽  
Justin M. Krasnomowitz ◽  
Michael J. Apsokardu ◽  
Lee Tiszenkel ◽  
Qi Ouyang ◽  
...  
Keyword(s):  
Sulfur Dioxide ◽  
Aerosol Particle ◽  
Particle Formation ◽  
Particle Formation And Growth
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