Sill processes in the Saguenay Fjord

Janes, David Charles (2008) Sill processes in the Saguenay Fjord. Masters thesis, Memorial University of Newfoundland.

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Abstract

Numerical simulations with a two-dimensional computer model are used in conjunction with a field study to examine sill processes near the shallow inner sill of the Saguenay Fjord, Quebec. The simulations predict that areas close to each side of the sill show enhanced turbulence, which could lead to the generation of internal waves and mixing. Spatial and temporal kinetic energies on each side of the sill are discussed along with their use to aid in planning a field study of the area. Field observations collected during Summer 2007 resulted in 23 internal wave trains being sampled, propagating in nearly every direction on both sides of the sill. The cross-channel motion of some of these wave trains could not be predicted by the model as it is two-dimensional. The use of a small, easily maneuverable boat for sampling resulted in the ability to sample a wave train more than once as it propagates. Shore-based photography from nearby hills were also collected providing a time-lasped data set showing the sea surface manifestations. A large-amplitude internal wave train is discussed along with perhaps the first ever documented occurrence of internal wave reflection in a coastal environment.

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