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| Titel |
Observation of equatorial Kelvin solitary waves in a slowly varying thermocline |
| VerfasserIn |
Q. Zheng, R. D. Susanto, X.-H. Yan, W. T. Liu, C.-R. Ho |
| 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 ; 5, no. 3 ; Nr. 5, no. 3, S.153-165 |
| Datensatznummer |
250002476
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| Publikation (Nr.) |
 copernicus.org/npg-5-153-1998.pdf |
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| Zusammenfassung |
| TOPEX/POSEIDON (T/P)
sea level deviation (SLD) time series from 3 October 1992 to 15 May 1997 combined with
upper ocean thermal structures are used to observe the characteristics and analyze the
dynamics of equatorial waves in the Pacific Ocean. The evolution of the Kelvin wave
propagating along an eastward shoaling thermocline in the equatorial Pacific is
investigated. The behaviour of this wave as it propagates eastward can be approximately
described with the solutions of the perturbed Korteweg-de Vries (PKDV) equation and
modified Green's Law. Assuming that the nonlinear term and dispersive term of this
equation are balanced, the amplitude increases as the thermocline decreases to the power
-3/8. Approaching the eastern Pacific, the nonlinearity increases and the relation changes
to the power -9/8. The dispersion relation, and mass and energy conservations are
investigated. The results indicate that under a varying thermocline, the nonlinear Kelvin
solitary waves indeed exist in the real ocean. |
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