Particulate @entity349 concentrations were investigated during intensive field campaigns at the urban and forest sites in central Poland, between April 2013 and October 2014. For the first time, quantitative determination of total particulate @entity349 in coarse (PHg2.2) and fine (PHg0.7) aerosol samples was conducted in Pozna   and Jeziory. The concentrations in urban fine and coarse aerosol fractions amounted to < MDL    77.1 pg m(-3) and < MDL    604.9 pg m(-3), respectively. Aerosol samples collected during the whole study period showed statistically significant differences for particulate @entity349 concentrations. A strong impact of meteorological conditions (wind velocity, air mass direction, air temperature, and precipitation amount) on particulate @entity349 concentrations was also observed. In particular, higher variation and concentration range of PHg0.7 and PHg2.2 was reported for wintertime measurements. An increase in atmospheric particulate @entity349 during the cold season in the study region indicated that coal combustion, i.e., residential and industrial heating, is the main contribution factor for the selected particle size modes. Coarse particulate @entity5332 at the urban site during summer was mainly attributed to anthropogenic sources, with significant contribution from resuspension processes and long-range transport. The highest values of PHg0.7 and PHg2.2 were found during westerly and southerly wind events, reflecting local emission from highly polluted areas. The period from late fall to spring showed that advection from the southern part of Poland was the main factor responsible for elevated @entity5332 concentrations in fine and coarse particles in the investigated region. Moreover, September 2013 could be given as an example of the influence of additional urban activities which occurred approx. 10 m from the sampling site-construction works connected with replacement of the road surface, asphalting, etc. The concentrations of particulate @entity5332 (>600.0 pg m(-3)) were much higher than during the following months when any similar situation did not occur. Our investigations confirmed that @entity5332 in urban aerosol samples was predominantly related to local industrial and commercial emissions, whereas the main source of @entity5332 in particulate matter collected at the forest site was connected with regional anthropogenic processes. This paper provides the results of the first long-term measurements of size-fractionated particulate @entity349 conducted in central Poland, which could be an important insight into atmospheric @entity5332 processes within such a scarcely investigated part of Europe.

Atmospheric particulate XXXX at the urban and forest sites in central Poland.

@entity349 :: ('MESH:D008628', 'Chemical') :: ['mercury'] @entity5332 :: ('D008628', 'Chemical') :: ['Hg']
@entity349 :: (MESH:D008628,Chemical) :: ['mercury']
