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| Titel |
Sub-inertial modulation of nonlinear Kelvin waves in the coastal zone |
| VerfasserIn |
D. V. Stepanov, V. V. Novotryasov |
| 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. 3 ; Nr. 20, no. 3 (2013-06-07), S.357-364 |
| Datensatznummer |
250018973
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| Publikation (Nr.) |
 copernicus.org/npg-20-357-2013.pdf |
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| Zusammenfassung |
| Observational evidence is presented for interaction between
nonlinear internal Kelvin waves at the ωt,i (where the
ωt is the semidiurnal frequency and the ωi is the
inertial frequency) and random oscillations of the background
coastal current at the sub-inertial Ω frequency in the
Japan/East Sea. Enhanced coastal currents at the sum ω+ and
difference ω-frequencies ω±=ωt,i ± Ω have properties of propagating Kelvin waves, which suggests
permanent energy exchange from the sub-inertial band to the
mesoscale ω± band. This interaction may be responsible for
a greater-than-predicted intensification, steepening and breaking of
boundary-trapped Kelvin waves. The problem of interaction between
the nonlinear Kelvin wave at the frequency ω and the
low-frequency narrowband noise with representative frequency
Ω≪ω is investigated using the theory of nonlinear
weak dispersion waves. |
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