Assessment of concentration variability and determination of the main sources of aerosol particles entering the atmosphere over the Crimean peninsula

by

A.A. Egorkin, V.Yu. Zhuravsky

Institute of Natural and Technical Systems, RF, Sevastopol, Lenin St., 28

E-mail: egorkin1974@yandex.ru

DOI: 10.33075/2220-5861-2023-3-148-153

UDC 504.064.2                                                                                       

Abstract:

The paper examines the data of re-analysis on the spread of aerosol particles PM2.5, according to meteorological conditions for the period from 2003 to 2022. The analysis of the average daily change in the trend of the PM2.5 aerosol mixing mass portion characterizing the selected interval is presented. Attention is focused on episodes of increasing the values of the aerosol mixing mass ratio in the atmosphere and their deviation from the 95th percentile. The suspected cases of atmospheric pollutant transfer to the territory of the Crimean Peninsula are explained by the data of cluster analysis of reverse trajectories of air mass transfer (HYSPLIT 4 model).

The variability assessment and determination of the main sources of pollutants entering the atmosphere over the Crimean Peninsula were carried out based on the analysis of CAMS data for the period from 2003 to 2022.

It was found that during this period, the average daily mass fraction of pollutants mixing in the atmosphere demonstrates insignificant fluctuations depending on the season (with a small maximum in winter).

The analysis revealed the following possible sources of increased concentration over the territory of the Crimean Peninsula:

– regional transport of particles from areas with numerous sources of negative impact located in the central part of the European continent;

– long-distance transport of dust aerosol from arid areas of the south with intense dust and sand storms;

–  mixed transfer of aerosol particles from anthropogenic sources from Europe and dust sources under certain weather conditions.

Episodes of extremely high concentrations of aerosols associated with atmospheric transport of pollutants from other regions were not detected in these studies.

Keywords: atmosphere, atmospheric air quality, long distance transport.

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