Evidence of Latitudinal Fractionation of Polychlorinated Biphenyl Congeners along the Baltic Sea Region

摘要: Annual cycles of the atmospheric concentrations PCBs were determined at 16 (mostly rural) stations around Baltic Sea between 1990 and 1993. The concentration levels individual congeners found to be influenced by their physical-chemical properties, ambient temperature, geographical location. Median similar all except one urban site near Riga. A latitudinal gradient with higher in south was for sum PCB as well congeners, more pronounced low volatility congeners. As a result, high increased relative importance latitude. Generally, but slopes partial pressure air versus reciprocal temperature different stations. In general, dependent than Steep sampling location indicate that is largely diffusive exchange soils. Lack dependence may due influence long-range transported masses remote sites episodic or random nature sources sites.