Results 1 - 10 of 41
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[en] Results of supervision on change of temperature of air during the periods of a dusty atmosphere in arid zone are described. Critical value of concentration of an aerosol is established. Long-term influence of dust aerosol on a climate was analyzed
[en] The flow of radiation can have great influence physical modification of the underlying surface, changing albedo because of deforestation, melting snow cover, etc. Some impact on temperature changes have also activity fluctuations in solar radiation and the earth's surface albedo, which depend on the relative size of continents and oceans and availability on the Earth's surface snow and ice cover
[en] The reasons of change of a transparency of air within day in conditions of dust storms are studied. The physical mechanism of formation of convective streams and developments of stagnation in a dusty atmosphere which is connected with presence simultaneously two diffusion processes-thermal diffusion and diffusion of a dust is established
[en] Present article is devoted to study of composition of samples of soils and dust haze selected in the vicinity of Aluminium Plant of Tajikistan by means of infrared spectroscopy method. It has been defined that data of conducted studies of soils samples and precipitations of dust haze selected in the vicinity of Uzbekistan border indicates that emissions from Aluminium Plant do not extend to the territory of Uzbekistan.
[en] Parameters of strongly non-uniform environment in the aerosol chamber are studied. For all above-stated tests a transparency, optical density, parameter Angstrom, factor of aerosol absorption and visibility range were calculated. Time and spectral dependences of the above-stated optical parameters of strongly non-uniform aerosol streams have been studied
[en] Present article is devoted to parameter variations of dust aerosol in Dushanbe according to data of Aero-net. The microstructure, complex refractive index, single-scattering albedo of dust aerosol have been studied.
[en] The surface ozone concentration of Ayvadj desert, Dushanbe city and Ziddi village was studied. The measuring of surface ozone concentration was carried out be means of gas analyzer F-105. The correlations of hourly average of ozone concentrations with air temperature and concentrations of dusty particles were studied.
[en] Present article is devoted to isotopic analysis of soils of South of Tajikistan and territory of Aluminium Plant. The isotope content of thorium and uranium series in the soil samples of the south of Tajikistan has been studied. The gamma radiometric analysis has been conducted by means of Canberra detector on the base of ultrapure germanium. Selected samples have been analyzed by means of roentgen-fluorescent analysis method as well. It has been defined that isotope content of thorium and uranium series in the soils selected towards to Uzbekistan border up to Aluminium Plant and after it is at a minimum (Pb-214, Bi-214, Pb-212, Ac-228, Tl-208) or below the average level (K-40) among the studied soil samples of the South and Central parts of Tajikistan.