Artículo
Energy transmission by barotropic Rossby waves revisited
Fecha de publicación:
12/2005
Editorial:
American Meteorological Society
Revista:
Journal of Physical Oceanography
ISSN:
0022-3670
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
This article presents a semianalytic method to investigate the propertie s of energy transmission across bottom topography by barotropic Rossby waves. The method is first used to r evisit the analytical estimates derived from wave-matching techniques and Wentzel–Kramers–Brillouin ( WKB) approximations. The comparison between the semianalytic method and WKB indicates that the res ults of the latter are valid for waves with periods longer than a month and ridges taller than 1000 m and wider than 500 km. For these parameter values both methods predict the passage of low-frequency waves and the reflection of high- frequency waves. The semianalytic method is then used to discuss the energ y transmission properties of a cross section of the Mid-Atlantic Ridge. It is shown that the filtering cha racteristics of realistic bottom topographies depend not only on the spatial scale set by the cross-section envelope, but also on the scales of the individual peaks. This dependence is related to the fact that topogr aphies narrower than 400 km (e.g., peaks) are high-pass filters of incoming waves, while topographie s wider than that (e.g., cross-section envelopes) are low-pass filters. In the particular case of the Mid-Atlant ic Ridge the neglect of the contri- bution of individual peaks leads to an erroneous estimate of the filtering properties of the massif.
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IADO)
Articulos de INST.ARG.DE OCEANOGRAFIA (I)
Articulos de INST.ARG.DE OCEANOGRAFIA (I)
Citación
Matano, Ricardo; Palma, Elbio Daniel; Energy transmission by barotropic Rossby waves revisited; American Meteorological Society; Journal of Physical Oceanography; 35; 12-2005; 2228-2236
Compartir
Altmétricas