%0 Journal Article %T Atmospheric particle evolution during a nighttime atmospheric mercury depletion event in sub-Arctic at Kuujjuarapik/Whapmagoostui, Québec, Canada %+ Laboratoire de glaciologie et géophysique de l'environnement (LGGE) %+ Polytech' Grenoble %+ Service Météorologique du Canada (SMC) %+ Groupe de Recherche sur l'Environnement et la Chimie Atmosphérique (GRECA) %+ UFR de Mécanique et de Physique %A Gauchard, Pierre-Alexis %A Ferrari, Christophe P. %A Dommergue, Aurélien %A Poissant, Laurier %A Pilote, Martin %A Guehenneux, Gaëlle %A Boutron, Claude F. %A Baussand, Patrick %< avec comité de lecture %@ 0048-9697 %J Science of the Total Environment %I Elsevier %V 336 %N 1-3 %P 215 à 224 %8 2005 %D 2005 %R 10.1016/j.scitotenv.2004.05.022 %K Atmospheric mercury depletion events %K Particles %K Ozone %K Transport %Z Sciences of the Universe [physics]/Ocean, AtmosphereJournal articles %X 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. %G English %L insu-00374351 %U https://insu.hal.science/insu-00374351 %~ INSU %~ UNIV-SAVOIE %~ UGA %~ CNRS %~ UNIV-GRENOBLE1 %~ INPG %~ IRSTEA %~ OSUG %~ GIP-BE %~ LGGE %~ AGREENIUM %~ INRAE %~ USMB-COMUE