Propagation d'ondes côtières piégees sous la couverture de glace dans la Baie d'Hudson

• Main Author: Reynaud, Thierry
• Format: Others
• Language: fr
• Published: McGill University 1989
• Subjects: Physical Oceanography.
• Online Access: http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59288

Since the beginning of the sixties, coastal trapped waves have been one of the most popular subjects in physical oceanography. Initially, we discuss their characteristics in the Southeast Hudson Bay, using the Brink and Chapman model. Then we compare the normal modes obtained with the observations made in Kuujjuarapik (Hudson Bay) in 1986 using the technique of Freeland et al (1986). This area is difficult to model because of rapid changes of stratification in the water column during the ice break-up period. The best fit was found for two topographic waves both having a period of three days with phase speeds of 70 cm/s and 13 cm/s. In this work it has been shown that the response function of the system due to atmospheric pressure gradients has a maximum at a period corresponding to the period of the topographic waves.