Experimental Investigation and Numerical Analysis of the Processes of Propagation of Snow Cover Pollution near a Major Highway
Snow samples were collected in ten points along a special route at a distance of 150 m from Sovetskoye Shosse in Novosibirsk in February 2008. Investigations at this object are carried out by the authors for more than 10 years. Using two schemes of sample preparation, the major inorganic and organic components of the chemical composition of automobile exhaust were determined. Analysis of the data over almost all the parameters under investigation provides evidence of the presence of monotonously decreasing dependence of pollutant concentrations with an increase in the distance from the road. A model with the small number of parameters was developed to estimate the deposition of a polydisperse admixture from a linear source. Approbation of the composed model was performed with the data of the route observations of the aerosol pollution of snow cover by polyaromatic hydrocarbons, macro-components and heavy metals. A substantial heterogeneity of the composition of precipitating aerosol admixtures was shown. The high levels of PAH concentrations in the snow were revealed both in the vicinity of and at a large distance from the road, which points to the substantial pollution of the atmospheric air with fine dispersed components.