• Acronyme :
  • Référence :
  • Domaine de recherche :
    Sciences de la Terre et de l'Univers
  • Région :
    Antarctique, Subantarctique
  • Site :
    Université Grenoble Alpes
  • Responsable du projet :
    Dommergue Aurelien

Global Mercury Observation system in austral and antarctic lands

The GMOstral is initiated by a European project GMOS (Global Mercury Observation System), which is developing a coordinated global observation system for the global pollutant, atmospheric mercury (Hg). Through a cyber-infrastructure it provides with high quality data for the validation and application of regional and global scale atmospheric models, to give a firm basis for future policy development and implementation. In this context we have implemented three Hg monitoring stations in sub-Antarctic and Antarctic sites (AMS, DDU and DMC) in order to document and monitor the atmospheric Hg trends in remote places of the southern hemisphere and to study the almost unknown reactivity of Hg in those regions, in particular diurnal cycling, deposition, and reemission trends in Antarctica. After 4 years of successful measurements, we propose to extend these monitoring activities on 2 sites (AMS and DMC) in order to provide with high quality data of atmospheric Hg that are freely accessible in the frame on an international convention (Minamata convention) and a global monitoring network acquire longer data set (up to 8 years of continuous data) in order to document the seasonality of Hg compounds and short term variation. Are the international regulations leading to decreasing atmospheric trend in the Southern Hemisphere or are the trends offset by increasing natural emission (from oceans or biomass burning) ? improve our knowledge on the transport and reaction pathways of mercury using GEOSCHEM 3D model