The fate of atmospheric mercury at Svalbard

The presentation show development and some highlights from five years \"Mercury Depletion Event (MDE) Campaigns\" at Ny-Ålesund, Svalbard (78o54’N, 11o53’E) where research groups from all together eight countries have participated. The purpose of this effort was to provide further quantitative information on mercury in different environmental compartments including air, snow, ice cores and seawater during polar spring and extend the database of MDEs. To contribute to the knowledge, we have conducted time-resolved speciated determination of mercury in the atmosphere (GEM, RGM, PM) and snow (total mercury, heavy metals) at two altitudes (474 and 12 m a.s.l.). At the sea level gas-transfer experiments over snow and sea surfaces have been conducted. Ice cores have been analysed for DGM and heavy metals. The observations have been analysed using meteorological and remote-sensing data..