Institution: | Departments of Atmospheric &Oceanic Sciences, and Chemistry McGill University, 801 Sherbrooke Street West, Montreal, PQ, Canada, H3A 2K6;;Meteorological Service of Canada, Environment Canada, 2121 Route Transcanadienne, Dorval, QC, Canada;;Département des sciences biologiques, Universitéde Montréal, 90 Vincent D'Indy, D-223, Montreal, PQ, Canada, H2V 2S9;;Meteorological Service of Canada, Environment Canada, Toronto, Ontario, Canada, M3H 5T4;;Environment Division, AREP, World Meteorological Organization, 7 bis, Avenue de la Paix, BP2300, 1211 Geneva 2, Switzerland |