During a field experiment at Kuujjuarapik/Whapmagoostui (55.31°N, 77.75°W), Québec, we observed increases of concentrations of particles with diameters larger than 0.3 μm in the ambient air during a nighttime atmospheric mercury depletion event (AMDE). These increases were strongly correlated with decreases of ozone and atmospheric mercury, and we also observed a change in the particle size distribution during this AMDE. Assuming that these phenomena imply either a chemical link or an association through transport, we also studied the nature of this AMDE. We hypothesize that the observed AMDE was a result of an influx of already depleted air masses and that it was not a product of local chemical reactions. © 2004 Elsevier B.V. All rights reserved.
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Gauchard, P. A., Ferrari, C. P., Dommergue, A., Poissant, L., Pilote, M., Guehenneux, G., … Baussand, P. (2005). Atmospheric particle evolution during a nighttime atmospheric mercury depletion event in sub-Arctic at Kuujjuarapik/Whapmagoostui, Québec, Canada. Science of the Total Environment, 336(1–3), 215–224. https://doi.org/10.1016/j.scitotenv.2004.05.022
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