Speciation measurements of airborne mercury species in northern Finland; Evidence for long range transport of air masses depleted in mercury

Mercury speciationmeasurements were performed at the Arctic measurement site, Pallas Matorova, in northern Finland during the period 12-04-02 to 12-04-26. For the first time Hg speciationmeasurements with high sensitivity and temporal resolutionwere performed at this site. The measurement allowed simultaneous determination of TGM, GEM, GOMand particulate bound mercury. Evidence for long range transport of air massesdepleted in mercury is provided as well as a study of possible mercury sources determining the temporal variations in airborne mercury species at the site.