| Abstract [eng] |
Long-range air mass transport significantly shapes air quality, affecting pollutant concentrations, aerosol chemical composition, and optical properties. Particle composition and size determine interaction with solar radiation - scattering or absorption - directly affecting atmospheric thermal balance. Thus, accurate aerosol characterisation and the identification of the contributions of local and regional sources, including long-range transport, remain key priorities in atmospheric and climate research. In urban environments, black carbon is a strong indicator of anthropogenic pollution, produced by the combustion of fossil and biofuels; its quantitative assessment reveals how cities contribute to regional pollution. In regional background environments, studies of aerosol dynamics provide measurement-based data valuable for climate modelling. Long-range transport was found to significantly affect black carbon mass concentration in urban environments, contributing to both pollution increase and dilution, with a stronger effect during the cold season. In the regional background, transport effects on aerosol concentration depend on air mass trajectory: transport over the Baltic Sea results in a decrease in aerosol mass, while transport across continental regions increases aerosol mass due to additional pollution sources. This dissertation applies integrated methods combining in-situ measurements, source apportionment, and atmospheric modelling across contrasting environments. |
