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Tidal Modulation of Two-layer Hydraulic Exchange Flows : Volume 3, Issue 6 (27/11/2006)

By Frankcombe, L. M.

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Book Id: WPLBN0004020955
Format Type: PDF Article :
File Size: Pages 22
Reproduction Date: 2015

Title: Tidal Modulation of Two-layer Hydraulic Exchange Flows : Volume 3, Issue 6 (27/11/2006)  
Author: Frankcombe, L. M.
Volume: Vol. 3, Issue 6
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2006
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Hogg, A. M., & Frankcombe, L. M. (2006). Tidal Modulation of Two-layer Hydraulic Exchange Flows : Volume 3, Issue 6 (27/11/2006). Retrieved from http://www.ebooklibrary.org/


Description
Description: Research School of Earth Sciences, The Australian National University, Canberra, Australia. Time-dependent, two layer hydraulic exchange flow is studied using an idealised shallow water model. It is found that barotropic time-dependent perturbations, representing tidal forcing, increase the baroclinic exchange flux above the steady hydraulic limit, with flux increasing monotonically with tidal amplitude (measured either by height or flux amplitude over a tidal period). Exchange flux also depends on the non-dimensional tidal period, Γ, which was introduced by Helfrich (1995). Resonance complicates the relationship between exchange flux and height amplitude, but, when tidal strength is characterised by flux amplitude, exchange flux is a monotonic function of Γ.

Summary
Tidal modulation of two-layer hydraulic exchange flows

Excerpt
Armi, L.: ~The hydraulics of two flowing layers with different densities, J. Fluid Mech., 163, 27–58, 1986.; Armi, L. and Farmer, D M.: ~Maximal two-layer exchange through a contraction with barotropic net flow, J. Fluid Mech., 164, 27–51, 1986.; Armi, L. and Farmer, D M.: ~A Generalization of the concept of Maximal Exchange in a Strait, J. Geophys. Res., 92, 14 679–14 680, 1987.; Bray, N., Ochoa, W J., and Kinder, T.: The role of the interface in exchange through the Strait of Gibraltar, J. Geophys. Res., 100, 10 755–10 776, 1995.; Harvey, J. and Arhan, M.: ~The Water Masses of the Central North Atlantic in 1983-84, J. Phys. Oceanogr., 18, 1855–1875, 1988.; Helfrich, K L.: ~Time-dependent two-layer hydraulic exchange flow, J. Phys. Oceanogr., 25, 359–373, 1995.; Ivey, G N.: ~Stratification and mixing in sea straits, Deep-Sea Res. II, 51, 441–453, 2004.; Nycander, J. and Döös, K.: ~Open boundary conditions for barotropic waves, J. Geophys. Res., 108, 10.1029/2002JC001 529, 2003.; Nycander, J., Hogg, A M., and Frankcombe, L M.: Open boundary conditions for nonlinear shallow water models, Ocean Modell., p. Submitted for Review, 2006.; Phu, A.: Tidally forced exchange flows, Honours thesis, University of Western Australia, 2001.; Stigebrandt, A.: On the effects of barotropic current fluctuations on the two-layer transport capacity of a constriction, J. Phys. Oceanogr., 7, 118–122, 1977.; Sy, A.: ~Investigation of large-scale circulation patterns in the Central North Atlantic: the North Atlantic Current, the Azores Current, and the Mediterranean Water plume in the area of the Mid-Atlantic Ridge, Deep Sea Res., 35, 383–413, 1988.; Wood, I R.: ~A lock exchange flow, J. Fluid Mech., 42, 671–687, 1970.

 

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