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| Titel |
Incidence and reflection of internal waves and wave-induced currents at a jump in buoyancy frequency |
| VerfasserIn |
J. P. McHugh |
| 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 ; 22, no. 3 ; Nr. 22, no. 3 (2015-05-04), S.259-274 |
| Datensatznummer |
250120979
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| Publikation (Nr.) |
 copernicus.org/npg-22-259-2015.pdf |
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| Zusammenfassung |
| 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. |
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