Assessment of the Wind Regime Peculiarities and Pollution Transfer for Tashkent

Tashkent is capital of the Republic Uzbekistan and the largest city in Central Asia. Its area constitutes 337.5 km2. Population amounts to 2 121 thousands. The city is situated in the East part of Central Asia on wide foothill plain on the right bank of the Chirchik River with the altitude 440-480 m.a.s.l. The East part of the city is slightly hilly, the West part - flat country. There are enterprises of machinery construction, building materials, aircraft industry and chemical ones in Tashkent. For the recent years traffic current has been increased considerably, new high-ways have put into exploitation, building industry changes rapidly - in the city a quantity of skyscrapers increases, the type of housing construction modifies. The city’s boundaries merge with suburbia. The influence of urbanization to climate is found in rising tendency of temperature, heat island appearance. Shift of the heat island from central part of city aside airport, which is found on south outskirts have been revealed. For assessment of the wind regime peculiarities the data from the meteorological stations “Observatory Tashkent” (centre of city), Kaunchi (plain rural locality) and “Airport Tashkent” were compared: The wind regime of city defines of pollution transfer. Atmosphere pollution control is performed in Tashkent since 1966 according to the observational data from the monitoring network points. Currently the observations are carried out at 12 stationary points. The database for atmospheric pollution observations has been developed (MS ACCESS). Mean long-term monthly of the concentrations of main polluting substances at the points have been estimated. Correlation coefficients between the points for these values have been calculated. Pollution concentrations dependences have been revealed between the points.