The article analyzes the wind directions and speeds typical for compact and linear cities over 5 years using the example of Stavropol and Volgograd, respectively. The results of the analysis allowed us to state that the wind direction and speed can be considered as random variables. Based on this approach, the regularities of the repeatability of wind speeds depending on the direction and time of day are investigated.

Keywords: linear city, cities of compact configuration, wind speed and direction, wind rose, distribution laws, atmospheric air, climatic parameters, Weibull's law, logarithmically normal law, mixed Gaussian distribution

In article the qualitative structure of emissions of pollutants in the atmosphere of St. Petersburg is considered and also dynamics of change of volumes of emissions of solid substances on air environment of the city is analyzed

Keywords: emissions of pollutants, atmospheric air, the solid (weighed) substances, stationary sources, non-stationary sources

The article discusses the features of the climatic conditions of St. Petersburg, affecting the formation of the ecological situation in the city, including the content of fine dust particles in the atmospheric air.

Keywords: fine dust, temperature, relative humidity, wind speed, wind rose, air pollution

In article the analysis of technological processes of repair construction works as sources of formation of fine dust is carried out. Results of pilot studies according to fractional composition and concentration of dust in urban air environment around carrying out such works are given

Keywords: dust, dust emissions, concentration, fractional structure, fine particles