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A Weakly Nonlinear Model for Multi-modal Evolution of Wind-generated Long Internal Waves in a Closed Basin : Volume 16, Issue 4 (17/07/2009)

By Sakai, T.

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Book Id: WPLBN0003975386
Format Type: PDF Article :
File Size: Pages 16
Reproduction Date: 2015

Title: A Weakly Nonlinear Model for Multi-modal Evolution of Wind-generated Long Internal Waves in a Closed Basin : Volume 16, Issue 4 (17/07/2009)  
Author: Sakai, T.
Volume: Vol. 16, Issue 4
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Redekopp, L. G., & Sakai, T. (2009). A Weakly Nonlinear Model for Multi-modal Evolution of Wind-generated Long Internal Waves in a Closed Basin : Volume 16, Issue 4 (17/07/2009). Retrieved from

Description: Department of Aerospace & Mechanical Engineering, University of Southern California, Los Angeles, CA 90089-1191, USA. A weakly nonlinear evolution model that accounts for multi-modal interaction in a small, continuously stratified lake of variable depth is derived. In particular, an evolution model for the first two vertical modes in a lake that is subject to wind stress forcing is numerically simulated. Defining modal energies, energy transfer between the first and the second vertical modes is calculated for several different forms of the density stratification. Modal energy transfer mainly occurs during reflection of mode-one waves at the vertical end walls, and it is shown that the amount of energy transfer from the first to the second mode is greatly dependent on the shape of the stratification profile. Also, the initial modal energy partition at the wind setup is shown to depend significantly on the penetration depth of the internal shear stress induced by the wind stress, especially if the stress distribution extends into the upper levels of the metalimnion.

A weakly nonlinear model for multi-modal evolution of wind-generated long internal waves in a closed basin

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