Effects of Siberian wildfires on the chemical composition and acidity of atmospheric aerosols of remote urban, rural and background territories

Extensive forest fires occurred during the summer of 2012 in Siberia. This work presents the influence of long-range atmospheric smoke on the aerosol properties at urban, suburban and background sites, which are located 400–800 km from the fire source. The higher levels of submicron particles (PM1),...

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Bibliographic Details
Published in:Environmental pollution (1987) 2014-05, Vol.188, p.8-16
Main Authors: Smolyakov, Boris S., Makarov, Valeriy I., Shinkorenko, Marina P., Popova, Svetlana A., Bizin, Mikhail A.
Format: Article
Language:English
Subjects:
Acidity
Aerosol chemical composition
Aerosols
Aerosols - analysis
Air Pollutants - analysis
Atmosphere - chemistry
Atmospherics
Carbon
Carbon - analysis
Environmental Monitoring
Fires
Hydrogen-Ion Concentration
Ions - analysis
Pollution abatement
Sampling
Seasons
Siberia
Siberian wildfires
Suburban and background sites
Summer
Urban
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Summary:Extensive forest fires occurred during the summer of 2012 in Siberia. This work presents the influence of long-range atmospheric smoke on the aerosol properties at urban, suburban and background sites, which are located 400–800 km from the fire source. The higher levels of submicron particles (PM1), organic (OC), secondary organic (SOC) and elemental (EC) carbon were observed at all sampling sites, whereas an increase in ionic species HCOO−, K+, NO3−, and Cl− and a decrease in pH was higher at the background and suburban sites in comparison with the urban site. Other natural and anthropogenic factors appear to be more significant for ions Ca2+ + Mg2+, HCO3−, NH4+, SO42− and Na+. The present study indicates that the impact of remote fires on the aerosol characteristics depends on their background (without fires) levels at the sampling sites. •Characterization of smoke samples from long-term remote wildfires in Siberia.•Impact of wildfires upon aerosol characteristics depend on a type of sampling site.•Higher levels of PM1, OC and SOC were found at all sites (urban, rural, and background).•Tracers of wildfires at rural and background sites were K+, HCOO−, Cl−, NO3− and pH.•Variations of Ca2+ + Mg2+, HCO3−, SO42−, NH4+ and Na+ were defined by other sources. The impact of remote fires on the aerosol characteristics depends on the type of sampling site and activity of prevalent local sources.
ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2014.01.017