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Observations and linear analysis of sill-generated internal tides and estuarine flow in Haro Strait

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Title: Observations and linear analysis of sill-generated internal tides and estuarine flow in Haro Strait
Author: Pawlowicz, Rich
Issue Date: 2002-06
Publicly Available in cIRcle 2011-05-31
Publisher American Geophysical Union
Citation: Pawlowicz, Rich. 2002. Observations and linear analysis of sill-generated internal tides and estuarine flow in Haro Strait. ournal of Geophysical Research Oceans 107(6) 3056 9-1-9-13 dx.doi.org/10.1029/2000JC000504
Abstract: Current meter records from two sets of observations 20 years apart in Haro Strait, British Columbia, Canada, are analyzed. Haro Strait is a deep channel separated from larger bodies of water on either side by relatively shallow sills. The estuarine flow in this region is in approximate geostrophic balance and is apparently unaffected by the tidally driven spring/neap cycle in vertical stratification. Strong baroclinic variability with an amplitude 1 m s-1 (close to the amplitude of the barotropic tide) is present. A linear theory for internal tides in silled basins is developed using no-bottom-flow boundary conditions to represent sill effects. By comparison with observations it is concluded that an internal tide is generated at the seaward sill and propagates inshore. Although local damping appears to be weak, no return signal is found from the inshore sill, suggesting that either dissipation is strong in that area or that the internal tide is transmitted across that sill. An edited version of this paper was published by AGU. Copyright 2002 American Geophysical Union.
Affiliation: Earth and Ocean Sciences, Dept. of (EOS), Dept of
URI: http://hdl.handle.net/2429/34986
Peer Review Status: Reviewed
Scholarly Level: Faculty

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