This work is dedicated to the studies of peculiarities of local circulations and pollutants transport in urban area. The research is fulfilled by means of a numerical mesoscale model of atmosphere dynamics and a model of pollutants transport in the orographically complex areas. The results of numerical experiments for winter meteorological scenarios made in the framework of Krasnoyarsk mesoclimate description are represented.
This paper presents a meso-scale non-hydrostatic model of atmospheric dynamics and some scenario calculations on formation of the local atmospheric circulations near the city of Krasnoyarsk. The results of numerical experiments are presented for summer and winter meteorological scenarios performed as a study of mesoclimates of the city and its surroundings. Using the numerical model it was possible to reproduce the processes of formation and development of the surface and elevated temperature inversions in the atmosphere of the territory in question. Experiments with basic state winds have shown that the orographic and thermal inhomogeneities of the underlying surface considerably transform the large-scale basic state flux.
The results of scenario estimation of summer conditions for the formation of atmospheric circulations and transport of pollutants of natural and anthropogenic origin in the Baikal region atmosphere and over the Baikal water area are presented. Possible changes in air quality are studied with a mesoscale nonhydrostatic model of atmospheric dynamics and pollutant transport. The investigation has revealed some meteorological situations that are unfavorable for air quality in the Baikal region and over its water area.