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dc.contributor.authorAmol, P.
dc.contributor.authorShankar, D.
dc.date.accessioned2024-03-31
dc.date.accessioned2024-09-13T06:18:57Z
dc.date.available2024-02-12
dc.date.available2024-09-13T06:18:57Z
dc.date.issued2024
dc.identifier.citationOcean Modelling, vol.188; 2024; Article no: 102336
dc.identifier.issn1463-5003
dc.identifier.otherhttps://www.sciencedirect.com/science/article/abs/pii/S1463500324000234
dc.identifier.urihttps://doi.org/10.1016/J.OCEMOD.2024.102336
dc.identifier.urihttp://drs.nio.res.in/drs/handle/2264/9246
dc.descriptionIF(JCR2023) = 3.2
dc.description.abstractThe linear equations of motion are solved to obtain dispersion diagrams with Rayleigh friction (??u) and Laplacian friction (??xxu), the latter being solved numerically. Laplacian friction is more efficient at eliminating the short-wavelength Rossby waves, whereas Rayleigh friction is more effective at dissipating long-wavelength Rossby waves. For Rayleigh friction, short-wavelength Rossby waves do not exist at periods longer than the damping time scale (1/?); for Laplacian friction, they do not exist for wavenumbers less than 3/(2?3). For both damping forms, the imaginary wavenumber (ki) no longer separates the upper branch (gravity waves) from the lower branch (Rossby waves) of the real wavenumber (kr), and the waves are damped at all frequencies. The two solutions of kr do not overlap, and for Rayleigh damping, they meet at 0.5??2, which roughly corresponds to ?13.7 days for very low friction. For very high Rayleigh damping, which is an unrealistic scenario, only gravity waves exist in the dispersion diagram. The consequence of adding friction, even if negligible, is that the discontinuity evident in the inviscid solution at the critical latitude no longer holds, or the critical latitude ceases to exist.
dc.languageen
dc.publisherElsevier
dc.relation.isreferencedbySCI
dc.rightsOnly the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations
dc.titleDispersion diagrams of linear damped waves on the equatorial beta plane
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Visakhapatnam, Andhra Pradesh, India


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