Abstract
Based on the database of the elemental and ionic composition of the tropospheric aerosol according to the data of aircraft measurements in the south of Western Siberia (SWS) in 1997-2020, taking into account the synoptic information about the air masses (AM) prevailing on sounding days and the results of the trajectory analysis, two main trajectorysynoptic samples with cases of the influence of the Aral-Caspian arid region (ACAR) on the SWS and with days without such influence. The chemical components-references of the ACAR aerosol were revealed: silicon, strontium, chromium, silver and magnesium - in the elemental composition, and in the water-soluble fraction - halide anions (fluorides, bromides and chlorides), ammonium and sodium cations. Days with the influence of ACAR are characterized by a 1.5-2- fold increase in the number concentration of aerosol particles with a size of 0.6-4 μm, which is associated with an increase in the volumetric concentration of aerosol in the atmospheric layer of 0.5-7 km by 1.5 times.
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