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Spring Aerosol in Urban Atmosphere of Megacity: Analytical and Statistical Assessment for Source Impacts

Category: Aerosol and Atmospheric Chemistry

Volume: 20 | Issue: 4 | Pages: 702-719
DOI: 10.4209/aaqr.2019.08.0412
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To cite this article:
Popovicheva, O., Padoan, S., Schnelle- Kreis, J., Nguyen, D.L., Adam, T., Kistler, M., Steinkogler, T., Kasper-Giebl, A., Zimmermann, R. and Chubarova, N. (2020). Spring Aerosol in Urban Atmosphere of Megacity: Analytical and Statistical Assessment for Source Impacts. Aerosol Air Qual. Res. 20: 702-719. doi: 10.4209/aaqr.2019.08.0412.

Olga Popovicheva 1, Sara Padoan2,3, Juergen Schnelle- Kreis3, Dac-Loc Nguyen3,5, Thomas Adam2,3, Magdalena Kistler4, Thomas Steinkogler4, Anneliese Kasper-Giebl4, Ralf Zimmermann3,5, Natalia Chubarova6

  • 1 Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow 119991, Russia
  • 2 Bundeswehr University München, Institute for Chemistry and Environmental Engineering, Neubiberg 85577, Germany
  • 3 Comprehensive Molecular Analytics (CMA) and Joint Mass Spectrometry Center (JMSC), Helmholtz Zentrum München, D-85764 Oberschleißheim, Germany
  • 4 Institute of Chemical Technologies and Analytics, TU Wien, 1060 Vienna, Austria
  • 5 Chair of Analytical Chemistry and Joint Mass Spectrometry Centre (JMSC), University of Rostock, D-18051 Rostock, Germany
  • 6 Geographical Faculty, Lomonosov Moscow State University, Moscow 119991, Russia

Highlights

  • Optical and analytical tools for identification of BB- affected and FF periods.
  • Attentive combination between analytical chemistry and statistics.
  • Aerosol composition explaining an impact of various emission sources.
  • Factors influencing the day-to-day variation in aerosol composition.

Abstract

In the complex situation with the plurality of emissions, the important research task of assessing the air quality and potential sources through aerosol composition analyses remains for Moscow’s megacity environment. The light absorption, PM10 mass concentration, aerosol composition, and meteorological parameters in this urban background were measured during spring 2017, a period characterized by significant changes in the air temperature, mass advection, and solar radiation. The organic and elemental carbon (OC and EC) and 76 organic compounds, e.g., alkanes, polycyclic aromatic hydrocarbons (PAHs), oxidized PAHs, hopanes, anhydrosugars, polyols, primary and secondary saccharides, and HULIS, as well as 13 ions, including K+, a marker of biomass burning, have been quantified to determine the carbonaceous and inorganic chemical profiles of the aerosol. The correlation between the absorption Ångström exponent (AAE) and the levoglucosan concentration reveals the relative contributions of agricultural fires and residential biomass burning (BB) nearby to the urban aerosol composition. Combining detailed analytical and statistical approaches, we have identified and analyzed the specific chemical compounds that most accurately represent the variability of the aerosol composition. Principal component analysis (PCA) highlights the main factors for marker species related to gasoline/diesel traffic, BB, biogenic activity, and secondary formation in the atmosphere. Distinguishing the BB-affected periods allows us to evaluate daily changes in the aerosol composition in relation to the transported air masses and detected fires in the areas surrounding Moscow.

Keywords

Megacity Aerosol composition Organic Biomass burning PCA


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