Particles formed in the automobile exhaust might form a significant fraction of fine particles in urban air. We have developed a model and produced parametrizations for predicting the particle formation rate at exhaust conditions. We studied the …
Atmospheric particle formation and growth were investigated using different nucleation models and size distribution representations. Nucleation was modeled using recently developed parameterizations for binary nucleation of water and sulphuric acid …
vThe incorporation of additional information on free energies of small clusters in a cluster distribution based on the capillarity approximation is considered in relation with self-consistency (SC). The concept of fictitious average monomers is …
In this paper we present parameterized equations for calculation of sulfuric acid-water critical nucleus compositions, critical cluster radii and homogeneous nucleation rates for tropospheric and stratospheric conditions. The parameterizations are …
[1] A parametrization of nucleation rates for H(2)O-H(2)SO(4)-NH(3) vapors in atmospheric conditions is developed. The parametrization is based on nucleation rates obtained from a self-consistent model of ternary nucleation, including state-of-art …
In this paper, we simulate the negative ion evolution shape considering 151 different ions, 66 trace gases and 493 ion-molecule reactions. The main attention is paid to the evolution interval from 30 ms to 3 s where the knowledge is most limited., …
A revised homogeneous ternary nucleation model in H2O-H2SO4-NH3 vapors is presented. The model is based on a self-consistent version of classical nucleation theory with a rigorous treatment of nucleation kinetics. The calculation of equilibrium vapor …
The formation of sulfuric acid-water hydrates in the vapor phase and nucleation rates of sulfuric acid-water clusters are investigated. The result of ab initio calculations and experimental data related to hydrates are utilized to improve the …
The values of enthalpy change Delta H-1 = -44.3 kJ/mol and entropy change Delta S-1 = -94.6 J/mol in the gas phase addition of a water molecule to a sulfuric acid molecule and entropy change Delta S-2 = -145 J/mol in hydration of a sulfuric acid …
A database of 8615 hourly averaged air ion mobility spectra in the range of 0.00041-3.2 cm(2) V-1 s(-1) was measured at Tahkuse Observatory, Estonia, during 14 months in 1993-1994. The average mobility spectrum over the whole period shows distinct …