摘要：Detailed measurements of particulate matter (PM) were conducted in the boreal arcticenvironment, next to an actively-operating open pit mine. Three distinct PM sources withdifferent chemical composition were identified: mining activities, long-range transported(LRT) PM and clean arctic air. The main sources of PM originating from the mining areawere vehicular emissions for submicron particles (PM1) and mining activities (includingre-suspended dust) for supermicron particles (PM1–10). PM1 originating from mining activitieshad a high contribution of black carbon (44%–48%), organic carbon (31%–46%) anda minor contribution from inorganic ions (< 21%) suggesting that it was mainly originatingfrom the vehicles. Based on elemental composition it is likely that supermicron particleswere mechanically generated and re-suspended PM from mining activities. In contrast, forthe air mass originating from the arctic areas, PM concentrations were very low and PMhad a different chemical composition. During the LRT episode, elevated sulphate concentrationsin submicron particles were observed.
