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| Titel |
Numerical simulations of the local generation of internal solitary waves in the Bay of Biscay |
| VerfasserIn |
N. Grisouard, C. Staquet |
| 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 (2010-10-13), S.575-584 |
| Datensatznummer |
250013734
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| Publikation (Nr.) |
 copernicus.org/npg-17-575-2010.pdf |
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| Zusammenfassung |
| Oceanic observations from the Bay of Biscay, Portugal, Mozambique
Channel and Mascarene Ridge have provided evidence of the generation of
internal solitary waves due to an internal tidal beam impinging on the
thermocline from below – a process referred to as "local generation". Here
we present two-dimensional numerical simulations with a fully nonlinear
nonhydrostatic model of situations that are relevant for the Bay of Biscay in
summer. We show that a beam impinging on a thermocline initially at rest can
induce a displacement of the isopycnals, large enough for internal solitary
waves to be generated. These internal solitary waves however differ from
those observed in the Bay of Biscay through their amplitude and distance
between wave trains. We then show that the latter feature is recovered when
the background flow around the thermocline as found in the Bay of Biscay is
included in the forcing, thereby yielding a more accurate view on the local
generation mechanism. |
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