The meteorological situations in Tomsk (Russia, Western Siberia), accompanied by the occurrence of weak (less than 1 m/s) and strong winds (leading to the occurrence of wind gusts above 11 m/s), are considered. To study these phenomena, the meteorological equipment of the “Atmosphere” (Research Equipment Sharing Center of the V.E. Zuev Institute of Atmospheric Optics, Russian Academy of Sciences, Siberian Branch) and numerical mesoscale meteorological and photochemical models developed at Tomsk State University, were used.
When analyzing the results of observations in 2019 and in 2020, the dates (cases) were selected when the considered meteorological phenomena manifested themselves most significantly. For light wind conditions, the TSUNM3 meteorological model confirmed the periods of the day when the observed wind velocity did not exceed 1 m / s. The using of a photochemical mesoscale model for the conditions of the Tomsk city confirmed the relationship between a weak near surface wind and a deterioration in the urban air quality. For strong wind conditions, the calculated wind velocity values change synchronously with the actual values measured both at the “Atmosphere” and at the civil aeronautical meteorological station of the Bogashevo airport, located at a distance of 18 km from Tomsk.

The work was supported by the Russian Science Foundation (project no.19-71-20042). Experimental data used for comparison with model calculations were obtained with the support of the Ministry of Education and Science of the Russian Federation (project no.AAAA-A17-117021310142-5).