Comparisons of mercury sources and atmospheric mercury processes between a coastal and inland site

摘要: [1] Comparisons of mercury sources and atmospheric processes were conducted between a coastal inland site in northeastern North America. Identifying Hg is essential for understanding what potentially contributing to bioaccumulation at these two sites. A data set consisting gaseous elemental (GEM), oxidized (GOM), particle-bound mercury, ozone, trace gases, particulate ions, meteorological analyzed using principal components analysis (PCA), absolute component scores (APCS), back trajectories. The PCA factors representing condensation on particles during winter combustion industrial found both However, the factor combustion/industrial was not 2010 either site, likely because SO2 emissions reductions from coal utilities 2008 2010. Using APCS trajectories, narrowed down shipping ports along Atlantic coast. affecting sites are different those influence marine airflows. GEM evasion ocean evident containing GEM, relative humidity, wind speed, precipitation with significantly higher contributions this source (APCS) oceanic trajectories compared land/coastal Analysis effects ozone water vapor mixing ratio %GOM/total suggest that Hg-Br photochemistry occurred lower concentrations (<40 ppb) absence free troposphere transport GOM.