Urban emissions of black carbon in the Arctic region by observations near Salekhard city
O.B. Popovicheva1, V.O. Kobelev2, A.I. Sinitsky2, N.M. Sitnikov3, M.A. Chichaeva4, A. Hansen5
1Skobeltsyn Institute of Nuclear Physics, Moscow, Russia
2Arctic Research Center of the Yamal-Nenets autonomous district, Salekhard, Yamalo-Nenets Autonomous Okrug, Russia
3Central Aerological Observatory, Moscow Region, Dolgoprudnyiy, Russia
4Lomonosov Moscow State University, Moscow, Russia
5Magee Scientific, 1916A M.L. King Jr. Way, Berkeley, CA 94704, USA
Keywords: городские эмиссии, черный углерод, Арктический регион, пожары, urban emissions, black carbon, Arctic region, wildfires
Abstract
Urban emissions of black carbon (BC) were studied, since BC is the most significant component of the polluted atmosphere of the Arctic region. Three-months continuous measurements of BC mass concentrations were carried out in April-August 2019 at the aerosol station near the Salekhard city with an AE33 seven-wavelength aethalometer. Using a concentration probability function for BC concentrations measured under different wind speed and direction, potential sources of emissions have been identified. In the north-west direction from the station, the sector of urban emissions was detected, where the range of BC concentrations was from 73 to 135 ng/m3. According to official data, transport and thermal power plants, which use diesel fuel, gasoline, and natural gas, are the major Salekhard urban emission sources. In April-May and June 2019, the average BC concentrations in urban emissions were 133 ± 80 and 105 ± 80 ng/m3. In July, during a period of intense forest fires on the Polar Circle, they attained 350 ± 120 ng/m3 and identified the contribution of smoke plumes to the aerosol loading and deterioration of the urban air.
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