We calculate structures and thermochernical parameters for H (2)so(4)center dot(H O-2)(n), HSO4 center dot H O-2),' H2SO (4)center dot NH (3)center dot(H O-2). and HSO (4)-center dot NHm center dot(H 2O)(m) clusters (with n = 0 center dot center dot …
Number size distributions of air ions and aerosol particles were measured at three sites in the Baltic Sea region in spring 2004. One site was on the island of Ut6 in the Baltic Sea and the two other sites, Hyyti5l5 and Tahkuse, had a more …
The LAPBIAT measurement campaign took place in the Varrio SMEAR I measurement station located in Eastern Lapland in the spring of 2003 between 26 April and 11 May. In this paper we describe the measurement campaign, concentrations and fluxes of …
We have measured the size distributions of air ions (0.42 - 7.5 nm in diameter) with the Balanced Scanning Mobility Analyzer in boreal forest, in Southern Finland since spring 2003. The size range covers the size range of cluster ions ( approximately …
In this study, we measured the mobility distributions of cluster and intermediate ions with an ion spectrometer near a waterfall. We observed that the concentration of negative 1.5 - 10 nm ions was one-hundred fold higher than a reference point 100 m …
In this work, the charging state of atmospheric nanoparticles was estimated through simultaneous measurements of aerosol size distribution and air ions mobility distribution with the aim to elucidate the formation mechanisms of atmospheric aerosols. …
Ions can speed up the formation of aerosol particles. The former studies have mainly concerned on the role of the ion charge itself. We have studied the possible (additional) role of the actual small air ion spectrum shape, and the quantitative role …
A new mathematical model describing air ion balance was developed and tested. It has improved approximations and includes dry deposition of ions onto the forest canopy. The model leads to an explicit algebraic solution of the balance equations. This …
We have calculated the thermochemical parameters for the reactions H2SO4 + H2O <-> H2SO4 center dot H2O and H2SO4 + NH3 <-> H2SO4 center dot NH3 using the B3LYP and PW91 functionals, MP2 perturbation theory and four different basis sets. Different methods …