Essays on oceanography / Crease, J.

Public ISBD Faire une suggestion d'achat Titre : Essays on oceanography Type de document : texte imprimé Auteurs : Crease, J., Auteur Editeur : Pergamon press Année de publication : 1985 Importance : 569 p. Format : 24 cm ISBN/ISSN/EAN : 978-0-08-032339-8 Langues : Anglais (eng) Index. décimale : 551 Géologie, météorologie, hydrologie générale Résumé : The linear response of a two layer ocean model to a periodic wind stress curl in the presence of bottom photography has been investigated. For periods much less than the time taken for the wind generated baroclinic Rossby waves to pass over the topography (i.e. 'short' periods), the ocean response is primarily that for a homogeneous ocean and thus strongly modified by topography. For periods much longer than this time (i.e. 'long' periods), the Rossby waves compensate for the effect of topography and the non-topographic Sverdrup balance holds. At intermediate periods, the phase and amplitude of the transport variations over topography can be understood in terms of a non-equilibrium baroclinic response forcing the barotropic mode over topography with relatively little feedback from the barotropic mode. The bottom topography therefore imposes a low pass filter on the transport variations. For the Atlantic at 25°N, the long period limit is of the order of years to decades, depending on the location of the wind stress variability, so at annual period the non-topographic Sverdrup balance is not applicable. Variations in transport can be forced by a wind stress over varying topography and by the passage of a coastal baroclinic Kelvin wave over topography. At short periods (including the annual), the effect of strong bottom topography is similar to that of an island. It was found that both with and without associated bottom topography a north-south island acts as a spatial filter such that wind stress forcing of larger north-south scale to the east of the island contributes proportionately more to transport variations to the west of the island than forcing of smaller north-south scale. Essays on oceanography [texte imprimé] / Crease, J., Auteur . - Pergamon press, 1985 . - 569 p. ; 24 cm. ISBN : 978-0-08-032339-8 Langues : Anglais (eng) Index. décimale : 551 Géologie, météorologie, hydrologie générale Résumé : The linear response of a two layer ocean model to a periodic wind stress curl in the presence of bottom photography has been investigated. For periods much less than the time taken for the wind generated baroclinic Rossby waves to pass over the topography (i.e. 'short' periods), the ocean response is primarily that for a homogeneous ocean and thus strongly modified by topography. For periods much longer than this time (i.e. 'long' periods), the Rossby waves compensate for the effect of topography and the non-topographic Sverdrup balance holds. At intermediate periods, the phase and amplitude of the transport variations over topography can be understood in terms of a non-equilibrium baroclinic response forcing the barotropic mode over topography with relatively little feedback from the barotropic mode. The bottom topography therefore imposes a low pass filter on the transport variations. For the Atlantic at 25°N, the long period limit is of the order of years to decades, depending on the location of the wind stress variability, so at annual period the non-topographic Sverdrup balance is not applicable. Variations in transport can be forced by a wind stress over varying topography and by the passage of a coastal baroclinic Kelvin wave over topography. At short periods (including the annual), the effect of strong bottom topography is similar to that of an island. It was found that both with and without associated bottom topography a north-south island acts as a spatial filter such that wind stress forcing of larger north-south scale to the east of the island contributes proportionately more to transport variations to the west of the island than forcing of smaller north-south scale.

Exemplaires(1)

Cote	Rayonnage		Support	Disponibilité
551.46 CRE		13	Consultation	Exclu du prêt

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