ИСТИНА

The dynamics of wind velocity V in Moscow region have been analyzed by the data of both direct (vanes on ground stations) and sodar measurements. The Doppler ‘MODOS’ sodar of METEK production operates at Moscow University since 2004. Ground measurements on the 10 m height in the most of stations demonstrate in average gradual decrease of V in the city and in suburbs. However it may be only local effect as a result of the urban saturation increasing in close vicinity of stations. Sodar measurements in the air layer from 40 to 200 m above the ground during last eight years do not confirm total fall of wind velocity in time. The profile of wind velocity V in the air layer from 7 to 500 m has been received and analyzed in average of eight last years with the use of Doppler sodar measurements for the heights from 40 to 500 m and, besides, the data of two anemometers which are installed at heights of 7 and 15 m at Moscow University (in limits of the sodar ‘dead zone’). Seasonal dynamic of the wind profile will be discussed. In average of a year it is close to logarithmical law up to 60 m so that this value seems to be equal to the surface air layer height. The annual course of ∂V/∂z values will be presented and discussed. The daily course of V is analyzed at various heights from 7 to 500 m. The methodical questions of comparison between direct and sodar wind data are discussed in details.