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© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  19 Aug 2020

19 Aug 2020

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This preprint is currently under review for the journal ACP.

Measurement report: Diurnal and temporal variations of sugar compounds in suburban aerosols from the northern vicinity of Beijing, China: An influence of biogenic and anthropogenic sources

Santosh Kumar Verma1,2, Kimitaka Kawamura1,3, Fei Yang1,4, Pingqing Fu1,5, Yugo Kanaya6, and Zifa Wang7 Santosh Kumar Verma et al.
  • 1Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan
  • 2State Forensic Science Laboratory, Home Department, Government of Chhattisgarh, Raipur 491001, India
  • 3now at: Chubu Institute for Advanced Studies, Chubu University, Kasugai 487-8501, Japan
  • 4Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Japan
  • 5Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China
  • 6Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
  • 7LAPC, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China

Abstract. Sugar compounds (SCs) are major water-soluble constituents in atmospheric aerosols. In this study, we investigated their molecular compositions and abundances in the northern receptor site (Mangshan) of Beijing, China, to better understand the contributions from biogenic and anthropogenic sources using a gas chromatography–mass spectrometry technique. The sampling site receives anthropogenic air mass transported by southerly winds from Beijing, while relatively clean air mass transported by northerly winds from the forest areas. Day- and nighttime variations were analyzed for anhydrosugars, primary sugars, and sugar alcohols in autumn 2007. Concentrations of overall SCs ranged from 30.8 to 875 ng m−3 (avg. 325 ng m−3), showing diurnal variations with higher levels in daytime (351 ng m−3) than nighttime (276 ng m−3). Interestingly, biomass burning (BB) tracers were more abundant in nighttime than daytime, while other SCs showed different diurnal variations. Levoglucosan was found as a dominant sugar among the observed SCs, indicating an intense influence of BB over Mangshan. The levels of fungal tracers (arabitol and mannitol) were higher in daytime than nighttime, suggesting a significant transport of fungal spores and microbes to the receptor site by atmospheric transport from Beijing area. The plant emissions from Mangshan forest park significantly control the diurnal variations of glucose and fructose. The pollen tracer (sucrose) showed a clear diurnal variation, peaking in daytime due to higher ambient temperature and wind speed. We found that soil dust contributes to trehalose in daytime while microorganisms were responsible to its emissions in nighttime. The meteorological parameters (relative humidity, temperature and rainfall) significantly affect the concentrations and diurnal variations of SCs. Positive matrix factorization analysis suggested that local BB and bioaerosols transported from Beijing area were significant sources of SCs. (289)

Santosh Kumar Verma et al.

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Publications Copernicus
Short summary
We studied aerosol samples collected in Autumn 2007 with day/night intervals in a rural site of Mangshan, north of Beijing, for sugar compounds (SCs) that are abundant organic aerosol components and can influence the air quality and climate. We found higher concentrations of biomass burning (BB) products at night- than daytime, whereas pollen tracers and other SCs showed an opposite diurnal trend. Because this site is meteorologically characterized by mountain/valley breeze.
We studied aerosol samples collected in Autumn 2007 with day/night intervals in a rural site of...