We are grateful to Dr. Stan Trier of the National Center for Atmospheric Research for providing Fig. 8a, and to Drs. Jocelyn Mailhot, Michel Béland, and Andrew Staniforth of Recherche en prévision numérique/Atmospheric Environment Service for their continuing interest and generous support during the course of this research. Thanks also go to Michel Valin, Bernard Bilodeau, Ning Bao, and Mario Lépine for their kindly assistance, and to Michel Riffiod of Météo-France/Centre National de Recherches Météorologiques (CNRM) for his drafting assistance. This research was funded by Environment Canada Contract KM156-0-9029, and by Natural Science and Engineering Research Council of Canada (NSERC). The first author (S. Bélair) was also supported by a graduate fellowship from NSERC.
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