Article

 

Energy Transmission by Barotropic Rossby Waves Revisited Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/articles/6q182r39z

Descriptions

Attribute NameValues
Creator
Abstract
  • This article presents a semianalytic method to investigate the properties of energy transmission across bottom topography by barotropic Rossby waves. The method is first used to revisit 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 results 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 energy transmission properties of a cross section of the Mid-Atlantic Ridge. It is shown that the filtering characteristics 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 topographies narrower than ~400 km (e.g., peaks) are high-pass filters of incoming waves, while topographies wider than that (e.g., cross-section envelopes) are low-pass filters. In the particular case of the Mid-Atlantic Ridge the neglect of the contribution of individual peaks leads to an erroneous estimate of the filtering properties of the massif.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Matano, R. P., E. D. Palma, 2005: Energy Transmission by Barotropic Rossby Waves Revisited. J. Phys. Oceanogr., 35, 2228–2236.
Journal Title
Journal Volume
  • 35
Journal Issue/Number
  • 11
Academic Affiliation
Rights Statement
Funding Statement (additional comments about funding)
  • The work of R. Matano was supported by NSF grant OCE 0118363, NASA Grant NAG512378, and JPL Contract 1206714. Author E. D. Palma was supported by grants from CONICET (PIP-6138) and from Universidad Nacional del Sur (24/F036).
Publisher
Peer Reviewed
Language
Replaces

Relationships

Parents:

This work has no parents.

Items