title: Effects of Siberian wildfires on the chemical composition and acidity of atmospheric aerosols of remote urban, rural and background territories.
abstract: 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 Ca(2+) + Mg(2+), HCO3(-), NH4(+), SO4(2-) 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.
authors: Nikolaev Institute of Inorganic Chemistry, SB of the RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia. Electronic address: ecol@niic.nsc.ru.
authors: Boris S
authors: BS
authors: Smolyakov
authors: Voevodsky Institute of Chemical Kinetics and Combustion, SB of the RAS, 3 Institutskaya Str., 630090 Novosibirsk, Russia.
authors: Valeriy I
authors: VI
authors: Makarov
authors: Nikolaev Institute of Inorganic Chemistry, SB of the RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia.
authors: Marina P
authors: MP
authors: Shinkorenko
authors: Voevodsky Institute of Chemical Kinetics and Combustion, SB of the RAS, 3 Institutskaya Str., 630090 Novosibirsk, Russia. Electronic address: popova@kinetics.nsc.ru.
authors: Svetlana A
authors: SA
authors: Popova
authors: Voevodsky Institute of Chemical Kinetics and Combustion, SB of the RAS, 3 Institutskaya Str., 630090 Novosibirsk, Russia.
authors: Mikhail A
authors: MA
authors: Bizin
mesh_terms: D000336:Aerosols / Q000032:analysis*; D000393:Air Pollutants / Q000032:analysis*; D001272:Atmosphere / Q000737:chemistry*; D002244:Carbon / Q000032:analysis; D004784:Environmental Monitoring; D005390:Fires; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000032:analysis; D012621:Seasons; D012800:Siberia
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D007477:Ions; D002244:Carbon
keywords: Acidity; Aerosol chemical composition; Siberian wildfires; Suburban and background sites; Urban