Black carbon seasonal trends and regional sources on Bely Island (Arctic)
O.B. Popovicheva1, M.A. Chichaeva1, V.O. Kobelev2, N.S. Kasimov1
1Lomonosov Moscow State University, Moscow, Russia
2Moscow Branch of the Russian Geographical Society, Moscow, Russia
Keywords: Arctic, black carbon, emissions, fossil fuel combustion, wildfires, seasonal trends
Abstract
The impact of aerosol sources on the atmosphere pollution of Russian Arctic sector is underestimated. The newly aerosol station was installed on Bely island (Kara sea) in August 2019, it is located on the way of air mass transportation from industrial regions of Western Siberia to the Arctic. Continuous aethalometric measurements of short leaving climate tracer - black carbon are carried out. They showed the seasonal variability with high values from December to April (60 ± 92 ng/m3) and low in June-September (18 ± 72 ng/m3). Pollution events with concentration higher background are identified. Regional distribution of fossil fuel and biomass burning sources are obtained by the concentration weight trajectory model. Impact of gas flaring from oil and gas extraction areas of Western Siberia, Volga-Ural, and Komi Republic is the most pronounced during the cold period while the wildfire smoke emissions are dominated in warm season. The difference between the black carbon concentrations in ultraviolet and infrared wavelength regions serves as a marker of biomass burning impact on the aerosol composition, indicating the residential wood combustion and agriculture and wildfires during cold and warm season, correspondently.
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