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Incidence and Reflection of Internal Waves and Wave-induced Currents at a Jump in Buoyancy Frequency : Volume 22, Issue 3 (04/05/2015)

By McHugh, J. P.

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Book Id: WPLBN0004017228
Format Type: PDF Article :
File Size: Pages 16
Reproduction Date: 2015

Title: Incidence and Reflection of Internal Waves and Wave-induced Currents at a Jump in Buoyancy Frequency : Volume 22, Issue 3 (04/05/2015)  
Author: McHugh, J. P.
Volume: Vol. 22, Issue 3
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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Mchugh, J. P. (2015). Incidence and Reflection of Internal Waves and Wave-induced Currents at a Jump in Buoyancy Frequency : Volume 22, Issue 3 (04/05/2015). Retrieved from

Description: University of New Hampshire, Durham, NH, USA. Weakly nonlinear internal gravity waves are treated in a two-layer fluid with a set of nonlinear Schrodinger equations. The layers have a sharp interface with a jump in buoyancy frequency approximately modeling the tropopause. The waves are periodic in the horizontal but modulated in the vertical and Boussinesq flow is assumed. The equation governing the incident wave packet is directly coupled to the equation for the reflected packet, while the equation governing transmitted waves is only coupled at the interface. Solutions are obtained numerically. The results indicate that the waves create a mean flow that is strong near and underneath the interface, and discontinuous at the interface. Furthermore, the mean flow has an oscillatory component that can contaminate the wave envelope and has a vertical wavelength that decreases as the wave packet interacts with the interface.

Incidence and reflection of internal waves and wave-induced currents at a jump in buoyancy frequency

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