A note on long Rossby waves on a quiescent abyss (Articolo in rivista)

Type
Label
  • A note on long Rossby waves on a quiescent abyss (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1140/epjp/i2011-11036-6 (literal)
Alternative label
  • F. Crisciani and R. Purini (2011)
    A note on long Rossby waves on a quiescent abyss
    in European journal of physics (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • F. Crisciani and R. Purini (literal)
Pagina inizio
  • 1 (literal)
Pagina fine
  • 7 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 126 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 4 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopus (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • ISMAR - UOS Trieste ISAC - UOS Roma (literal)
Titolo
  • A note on long Rossby waves on a quiescent abyss (literal)
Abstract
  • The framework of the investigation is the propagation of quasi-geostrophic Rossby waves in a two-layer ocean, within the ?-plane approximation. The propagation of long Rossby waves in the upper layer is considered, while the lower layer represents a hypothetical resting abyss. It is shown, by means of a systematic scale analysis, that this model implies that the depth of the permanent pycnocline relative to the total ocean depth is of the same order of magnitude as a typical parameter inherent to the ?-plane approximation. From the quantitative point of view, there is a full accordance between the depth of the permanent pycnocline so estimated and the real one. The phase velocity of the so-obtained long Rossby waves, which are non-dispersive, results to be closer to observations than the phase velocity of the first baroclinic mode of long Rossby waves in a continuously stratified ocean. We point out also that the same kind of propagation of a standard Rossby wave would require an unrealistically small thickness of the upper layer. Thus, in the latter case, Rossby waves necessarily propagate also in the lower layer. © Società Italiana di Fisica / Springer-Verlag 2011. (literal)
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