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| Titel |
Transformation of internal solitary waves at the "deep" and "shallow" shelf: satellite observations and laboratory experiment |
| VerfasserIn |
O. D. Shishkina, J. K. Sveen, J. Grue |
| 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 ; 20, no. 5 ; Nr. 20, no. 5 (2013-10-09), S.743-757 |
| Datensatznummer |
250086053
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| Publikation (Nr.) |
 copernicus.org/npg-20-743-2013.pdf |
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| Zusammenfassung |
| An interaction of internal solitary waves with the shelf edge in the time
periods related to the presence of a pronounced seasonal pycnocline in the
Red Sea and in the Alboran Sea is analysed via satellite photos and SAR
images. Laboratory data on transformation of a solitary wave of depression
while passing along the transverse bottom step were obtained in a tank with a
two-layer stratified fluid. The certain difference between two characteristic
types of hydrophysical phenomena was revealed both in the field observations
and in experiments. The hydrological conditions for these two processes were
named the "deep" and the "shallow" shelf respectively. The first one
provides the generation of the secondary periodic short internal waves –
"runaway" edge waves – due to change in the polarity of a part of a soliton
approaching the shelf normally. Another one causes a periodic shear flow in
the upper quasi-homogeneous water layer with the period of incident solitary
wave. The strength of the revealed mechanisms depends on the thickness of the
water layer between the pycnocline and the shelf bottom as well as on the
amplitude of the incident solitary wave. |
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