Seasonal and Interannual Variability of Aerosol Characteristics According to the Data of Long-Term (2011–2021) Measurements at the Russian Scientific Center on the Spitzbergen Archipelago

— The results of the analysis of seasonal and interannual variability of the aerosol optical depth of the atmosphere (AOD), the aerosol volume concentration, and the mass concentration of black carbon in the surface layer obtained at observations in Barentsburg (Spitzbergen archipelago) in 2011–2021 are presented. The annual behavior of all parameters is characterized by two maxima: spring (or winter-spring) and summer, apparently due to the transport of pollutants from the middle latitudes in the winter-spring period and smoke aerosol in summer. In the interannual variability, there are significant negative trends in the fine AOD component (−0.012 over 11 years) and the mass concentration of the absorbing substance (by 46.7 ng/m 3 over 10 years).