J. Phys. IV France
Volume 107, May 2003
Page(s) 1079 - 1082

J. Phys. IV France
107 (2003) 1079
DOI: 10.1051/jp4:20030487

Time series analysis of atmospheric mercury in Kuujjuarapik/Whapmagoostui (Québec)

L. Poissant and M. Pilote

Service Météorologique du Canada, Processus Atmosphériques des Toxiques, Environnement Canada, 105 rue McGill, Montréal, Québec H2Y 2E7, Canada

Recent mercury depletion events observed in the Arctic have opened the horizon to numerous new aspects on mercury fate and cycling in the environment. Total Gaseous Mercury and other Atmospheric Mercury speciations are measured in Kuujjuarapik/Whapmagoostui (Lat.: 55.30°N; Long.: 77.73°O) along the Hudson Bay (Québec) with Tekran 2537A, 1130 and 1135 units. The former is measured since August 1999 whereas the latter are measured during springtime periods over the last three years. Mercury Depletion Events are observed at this low latitude région. MDEs are observed between February and April and are occurring during both the day and nighttime periods. Typically, MDE in Kuujjuarapik are related to air temperature. During MDEs, a significant speciation conversion from Hg, to RGM and TPM is operating. However, ratios of TPM to RGM conversion are variable in time.

© EDP Sciences 2003