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    Influence of a Mid-Ocean Ridge on Wind-Driven Barotropic Rossby Waves

    Source: Journal of Physical Oceanography:;1984:;Volume( 014 ):;issue: 012::page 1930
    Author:
    Barnier, Bernard
    DOI: 10.1175/1520-0485(1984)014<1930:IOAMOR>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: An analytical study investigates the influence of a mid-ocean ridge in a barotropic ocean on the energy radiation by wind-driven, quasi-geostrophic, linear Rossby waves. The ocean basin is bounded on the east and west by meridional boundaries and is separated in its middle by a north-south ridge with zonal exponential depth profiles. The forcing function is oscillatory, either propagative or not, and represented by one or a linear combination of plane waves. The excitation frequencies range from a week to about six months (the chosen spin-down time for Rossby waves). High-frequency forcings (about 10-days period) excite basin-size topographic Rossby-modes propagating westward along the f/h contours. Low-frequency forcings (several-week period) excite Rossby-modes relative to each half basin, but modified by the bottom slope. At very low-frequencies (several-month period), Rossby wave reflection and bottom friction set up a boundary layer at the western boundary of the basin but no such sign significantly appears at these frequencies on the eastern flank of the ridge. When the forcing is not zonally uniform, the position of the maximum of the wind-stress curl relative to the ridge appears to be a parameter that significantly influences the ocean response.
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      Influence of a Mid-Ocean Ridge on Wind-Driven Barotropic Rossby Waves

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    contributor authorBarnier, Bernard
    date accessioned2017-06-09T14:47:18Z
    date available2017-06-09T14:47:18Z
    date copyright1984/12/01
    date issued1984
    identifier issn0022-3670
    identifier otherams-26788.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4163720
    description abstractAn analytical study investigates the influence of a mid-ocean ridge in a barotropic ocean on the energy radiation by wind-driven, quasi-geostrophic, linear Rossby waves. The ocean basin is bounded on the east and west by meridional boundaries and is separated in its middle by a north-south ridge with zonal exponential depth profiles. The forcing function is oscillatory, either propagative or not, and represented by one or a linear combination of plane waves. The excitation frequencies range from a week to about six months (the chosen spin-down time for Rossby waves). High-frequency forcings (about 10-days period) excite basin-size topographic Rossby-modes propagating westward along the f/h contours. Low-frequency forcings (several-week period) excite Rossby-modes relative to each half basin, but modified by the bottom slope. At very low-frequencies (several-month period), Rossby wave reflection and bottom friction set up a boundary layer at the western boundary of the basin but no such sign significantly appears at these frequencies on the eastern flank of the ridge. When the forcing is not zonally uniform, the position of the maximum of the wind-stress curl relative to the ridge appears to be a parameter that significantly influences the ocean response.
    publisherAmerican Meteorological Society
    titleInfluence of a Mid-Ocean Ridge on Wind-Driven Barotropic Rossby Waves
    typeJournal Paper
    journal volume14
    journal issue12
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/1520-0485(1984)014<1930:IOAMOR>2.0.CO;2
    journal fristpage1930
    journal lastpage1936
    treeJournal of Physical Oceanography:;1984:;Volume( 014 ):;issue: 012
    contenttypeFulltext
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