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Particulate matter is one of the most significant types of atmospheric pollution.One of the most important compound of them is carbon but they might also include other substances such as heavy metals.Their presence in the atmosphere affects the water budget,climate change and human health.Elemental carbon(EC)is emitted directly into the atmosphere as a primary pollutant in the form of fine particles from high-temperature combustion of fossil fuels.The organic carbon(OC)is a mixture of compounds containing,among other things,aliphatic and aromatic compounds,which may derive from both natural and anthropogenic sources.Mercury is highly neurotoxic and it could be responsible for many diseases such as Parkinsons,Alzheimers or autism.Most of the mercury-related aerosols comes from direct emissions from anthropogenic sources such as heat and electricity.Mercury can adsorb onto aerosols rich in carbon compounds.Aerosol samples was collected daily during the whole 2012 in the coastal zone of the Baltic Sea(Poland).The aim of the study was to determine the effect of terrestrial and marine sources of to the variability of Hg(p),OC and EC concentrations in PM1 and to define the relationship between these compounds.Higher concentrations of analyzed components in PM1 were recorded in winter than in summer.The mean concentration of Hg(p)in PM1 in the winter was 17.5 pg m-3.OC and EC levels were at 6.3 and 2.1 ug m-3,respectively.Concentrations of mercury and carbon in PM1 were inversely proportional to the air temperature and the wind speed.It may be associated with common local sources,combustion processes in the study area.Furthermore,high concentrations of Hg(p),EC and OC occurred during extended periods without rainfall.During the warm months the concentrations of analyzed compounds in PM1 decreased.The mean mercury concentration was 2.1 pg m-3,and the mean concentrations of OC and EC were 4.5 and 15 ug m-3,respectively.Lower Hg levels in the summer could be associated with the processes of evaporation of mercury from aerosols.Concentrations of mercury,similar to carbon,were lowest when the advection from the mainland occurred.During the warm months Hg(p)was connected with two factions of carbon only when the advection from the sea occurred and the concentration of carbon were high.Higher humidity and the higher concentrations of the sea salt in warm season in contrast to the cooler months favored the conversion of mercury in gaseous form in the aerosol.