Source apportionment of fine (PM0.15-1.15) and coarse PM1.15-10) aerosol fraction in urban environment in winter season
Abstract
In winter 2010 sampling campaign was conducted in center of Prague. Datamatrix of 60 minute integrates of PM0.15-1.15 and PM1.15-10 mass concentrations, derived from correspond size distributions recorded by an APS (3321, TSI) and a SMPS (3963, TSI), and elemental composition for 27 elements sampled by 3DRUM and analyzed by SXRF, were evaluated by positive matrix factorization (PMF) to resolve the possible sources of fine and coarse aerosol fraction in this area.
PMF was optimized for five factors for both fractions. They were: for fine fraction - combustion of fossil fuels and biomass, two traffic factors (exhaust and non-exhaust emissions), factor with high S and factor with high Cl and metals; for coarse fraction – re-suspended mineral and road dust, factor with high Zn and Pb, combustion of fossil fuels and biomass.
The conditional probability function (CPF) was then used to identify the local sources and HYSPLIT long distance transport.