Seasonal, Weekly, and Diurnal Black Carbon in Moscow Megacity Background under Impact of Urban and Regional Sources

Popovicheva, O.; Chichaeva, M.; Kovach, R.; Zhdanova, E.; Kasimov, N.

Авторы: Popovicheva Olga, Chichaeva Marina, Kovach Roman, Zhdanova Ekaterina, Kasimov Nikalay
Журнал: Atmosphere
Том: 13
Номер: 4
Год издания: 2022
Издательство: MDPI
Местоположение издательства: Basel, Switzerland
Первая страница: 563
DOI: 10.3390/atmos13040563
Аннотация: Moscow megacity has a big gap in assessment of air quality, resulting in severe aerosolpollution. Black carbon (BC) concentrations over different timescales, including weekly and diurnal,are studied during four seasons of 2019–2020 at urban background site. Seasonal BC varies from 0.9to 25.5 μg/m3 with a mean of 1.7 ± 1.4 μg/m3 . Maximum mean BC equal to 2.2 ± 1.8 μg/m3 was ob-served in spring. Diurnal trends of black carbon concentrations differ in spring/summer and au-tumn/winter periods, they exhibit morning and evening peaks corresponding to traffic combinedwith the boundary layer height effect. The weekly cycle of BC characterizes the highest amount ofcombustion-related pollution on working days and the characteristics of population migration froma city for weekend. Seasonal pollution roses show the direction of the highest BC contamination.For identification of BC sources relating to traffic, heat and power plants, and industry around thesite, polar plots are used. The spectral dependence of the aerosol light attenuation provides the es-timate for Absorption Angstrom Exponent (AAE). We use the AAE above 1.3 and high frequencyof AAE observation above 1 in order to support the assessment for a contribution of biomass burn-ing in the region around Moscow in autumn and winter as well as of agriculture fires and wildfiresin warm seasons. Air masses arriving to a city from fire-affected regions in spring and summerimpact urban air pollution
Добавил в систему: Чичаева Марина Александровна

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Seasonal, Weekly, and Diurnal Black Carbon in Moscow Megacity Background under Impact of Urban and Regional Sourcesстатья

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