Estimation of the Arctic aerosols from local and long-range transport using relationships between 210Pb and 212Pb atmospheric activity concentrations

摘要: In this study, the aerosol activity concentrations of 210Pb at 28 Canadian radiological monitoring stations from 2009 to 2013 were analyzed. The results show that ratio winter average concentration summer increases with increasing latitude. This could be used evaluate transport pollutants Arctic region such as haze Eurasia through long-range atmospheric during winter. Based on 12 years Yellowknife station includes both and 212Pb concentrations, study confirms seasonal distribution ratios has a significant peak in relatively low value summer, which can an indicator air mass flow Arctic. period dominated by was estimated fitting Gaussian function values A width parameter full half maximum (FWHM) allows year estimate influence aerosols, varied between 67 88 days study. fitted also shows season continental influenced usually starts mid-to-late November ends April. Thus, distributions may enable determination periods scale different latitudes.