Atmospheric Mercury Speciation

This well-known commercial Hg speciation system is installed indoors at the Pic du Midi in order to avoid technical issues during the harsh winter period (ice riming and storms). The system operationally separates 3 different atmospheric Hg species : gaseous elemental Hg (GEM), gaseous oxidized Hg (GOM, such as HgCl2, HgB2, HgO), and particulate bound Hg (PBM). GEM is measured at a 5 min frequency, while GOM and PBM are measured at a 2h frequency. Our observations are accessible through GMOS (www.gmos.eu) under DOI 10.25326/353.