Ukr. geogr. z. 2019, N1:43-50
Language of publication: 

L.M. Nadtochii - Ukrainian Hydrometeorological Institute, Kyiv;
M.V. Savenets - Ukrainian Hydrometeorological Institute, Kyiv;
M.P. Bashtannik - Ukrainian Hydrometeorological Institute, Kyiv;
I.V. Dvoretska - Ukrainian Hydrometeorological Institute, Kyiv.


The purpose of research is evaluation of intra- and interannual dust variability in the atmosphere of certain Ukrainian cities, determination of dust dynamics within influence of anthropogenic and natural factors for different temporal scales. Based on statistical methods the research contains seasonal and interannual variability calculation, trend estimation, and determination of meteorological conditions, which cause interannual dust variability. Clear intraannual variations are absent, however, they could appear during separate periods. In general, coefficients which show seasonality strength decrease in cities and correspond to weakening of intraanual variations. The reason of such effects connected with increasing of mobile sources impact due to constant emission during the whole year and mechanical influence on accumulated dust. Within timescale of several years positive and negative trends were observed and natural factor strengthens in dust variations. Highest positive and all negative trends coincide with changes of emission from stationary sources. 4 among 20 cities do not have any tendency in dust content changes. Significant interannual variations could be combine in several groups. The highest impact in total dispersion have variations approximately 6.2 and 9.3 years with amplitudes 0.04–0.08 mg/m3 and 0.02–0.08 mg/m3 accordingly. Large group of significant interannual variations are within 2.7–3.7 years and 4–5.2 years. All periods could be found in meteorological dynamics correspond to low frequent lunar nodal tidal variations and global circulation variability. Clear connection with meteorological conditions had been found with relative humidity and wind characteristics: average wind speed and zonal component. Spatial dependences also were found: dust variability in coastal cities mostly influenced by changes in relative humidity, whereas wind play crucial role on inland territories. Relation between dust and relative humidity have negative sign, which means that saturation of the atmospheric air impact on dust decreasing. Therefore, the research defines crucial role of meteorological conditions for dust interannual variability, which are connected with changes of wet deposition and pollutant dispersion.

Key words: 
dust, atmospheric air, intraannual variability, interannual variability, anthropogenic factors

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