Abstract
Results of analysis of anomalies and long-term trends in the near-surface aerosol mass concentration measured at the Zvenigorod Scientific Station (ZSS), the A.M. Obukhov Institute of Atmospheric Physics, in 1991–2019 are presented. The analysis is done with taking into account the dependence of the aerosol concentration on wind direction. Three successive periods 1991–2002, 2003–2012, and 2013–2019 that significantly differ in aerosol concentrations and their variability are considered. The second period is characterized by frequent and especially strong anomalies of high aerosol concentrations. Individual wind directions and wind direction sectors that most likely contribute to low and high aerosol concentrations have been determined. Aerosol linear trends estimated for all the three periods differ in value and features of seasonal dependence. Statistically significant seasonal trend estimates have been obtained for the winter and spring of 1991–2002; the winter, spring, and autumn of 2003–2012; and the spring, summer, and autumn of 2013–2019. The annual trend estimates are negative for the all three periods. The mass concentration of near-surface aerosol has generally decreased over the past 30 years, although the decrease is nonuniform.
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Gruzdev, A.N., Isakov, A.A. Anomalies and Trends in the Near-Surface Aerosol Concentration in the Western Moscow Region. Izv. Atmos. Ocean. Phys. 57, 379–389 (2021). https://doi.org/10.1134/S0001433821040174
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DOI: https://doi.org/10.1134/S0001433821040174