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| Titel |
Energetics of internal solitary waves in a background sheared current |
| VerfasserIn |
K. G. Lamb |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 17, no. 5 ; Nr. 17, no. 5 (2010-10-08), S.553-568 |
| Datensatznummer |
250013732
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| Publikation (Nr.) |
 copernicus.org/npg-17-553-2010.pdf |
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| Zusammenfassung |
| The energetics of internal waves in the presence of a background sheared
current is explored via numerical simulations for four different situations
based on oceanographic conditions: the nonlinear interaction of two internal
solitary waves; an internal solitary wave shoaling through a turning point;
internal solitary wave reflection from a sloping boundary and a deep-water
internal seiche trapped in a deep basin. In the simulations with variable
water depth using the Boussinesq approximation the combination of a
background sheared current, bathymetry and a rigid lid results in a change in
the total energy of the system due to the work done by a pressure change that
is established across the domain. A final simulation of the deep-water
internal seiche in which the Boussinesq approximation is not invoked and a
diffuse air-water interface is added to the system results in the energy
remaining constant because the generation of surface waves prevents the
establishment of a net pressure increase across the domain. The difference in
the perturbation energy in the Boussinesq and non-Boussinesq simulations is
accounted for by the surface waves. |
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