ИСТИНА

Comprehensive BC source studies in the Arctic atmosphere require large spatial and temporal scales. High temporal-resolution, one-year-long BC measurements during the MOSAiC expedition in the Central Arctic are expended on simultaneous BC observations at Western and European Arctic sections; the Arctic spatiotemporal BC distribution and episodes of the highest pollution are highlighted. BC origin and main contributing sources are assessed for each location using FLEXPART driven with ECLIPSE-GFAS emission inventories. Combined geospatial view provides the contributions of dominated gas flaring, domestic and transport sectors from populated regions in the cold period and biomass burning from wildfires in the warm period.