ИСТИНА

Results of long-term sodar measurements of the wind vertical component standard deviation σw have been presented. Two methods of measurements of this parameter have been realized at Moscow University with the use of two different sodars – both usual spectral estimations from the echo-signal spectrum, and specific statistical calculations on a base of sampling of the wind vertical component values W. Main features of the σw climatology are discussed. Both methods demonstrate similar daily course of this parameter. It is comparatively smoothed in winter and is characterized by sharp maximum in the afternoon in spring and in summer. However, the data about annual course are different. Accordingly to spectral method, there are no significant differs from one season to another whereas statistical calculations demonstrate clear maximum in the warm period. Comparisons of hourly-averaged values of σw with the ground concentrations of minor air gases demonstrate hyperbolic relation in case of primary pollutants such as carbon oxide and linear relation in case of ozone due to a growth of the content of this gas with a height.