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Based on the data of experimental studies of wave disturbances in the Earth's atmosphere before and after the earthquakes in Uzbekistan (May 26, 2013) and Kyrgyzstan (January 8, 2007), earlier unknown changes in the parameters of internal gravity waves are revealed. These changes were manifested during the period of five days before the earthquake and in certain cases can be used for short-term prediction of the time when seismic events are to occur. [ABSTRACT FROM AUTHOR]

The article presents the findings of a study conducted on small-scale particles found in atmospheric brown clouds (ABC) in Central Asia region. It discusses the classification of particles on the basis of sizes, as nanoparticles and microparticles effectively influence the screening of solar irradiation and scattering of the light in the atmosphere, causing a decrease in visibility and disturbing the climatic balance. It also mentions that the brown shade of ABC is caused by absorption and scattering of the solar irradiance by the anthropogenic black carbon, soot dust, soil particles and nitrogen dioxide.