Аннотация:Multiple sources of air pollution in Moscow, no using of biomass and coal, have complicated the identifying observed BrC light absorption.Four sources obtained using BrC PMF analysis: FF combustion; BB; secondary aerosols and city dust. The uniqueness of Moscow megacity for BB impact studies in Europe and Asia is highlighted by gas-fueled heating system,and) exposure by BB emissions transported from the region around at the level similar during HP and non-HP periods. BB impact increases during spring regional agriculture and summer wildfires. Moscow is mostly affected by BrC which contribution is higher from FF combustion than from BB
