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    A Comparison of Low-Frequency Current Observations off British Columbia with Coastal-Trapped Wave Theory

    Source: Journal of Physical Oceanography:;1984:;Volume( 014 ):;issue: 001::page 22
    Author:
    Yao, T.
    ,
    Freeland, Howard J.
    ,
    Mysak, Lawrence A.
    DOI: 10.1175/1520-0485(1984)014<0022:ACOLFC>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Six current-meter mooring were deployed in a line approximately 600 km in length along the continental shelf of British Columbia. Analysis of the low frequency (periods exceeding a day) fluctuations in current for the winter 1981?82 period is discussed. Alongshore currents off Vancouver Island are mutually correlated with time lag less than a day. The region of mutual correlation does not extend north of Vancouver Island, across Queen Charlotte Sound. Coherence is observed between currents south and north of Queen Charlotte Sound only in a frequency band where there is mutual coherence with local wind. A comparison is made between observation and free coastal-trapped wave theory. Off northern Vancouver Island, where the shelf is narrower than off southern Vancouver Island, there is increased vertical shear, a feature of the second coastal-trapped wave mode. A consistency test is applied using the cross spectral matrix of alongshore components of velocity. In the dominant energy-containing frequency bands (periods ?10 days), the structure of alongshore currents off Vancouver Island is consistent with the two lowest free coastal-trapped wave modes locked in phase.
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      A Comparison of Low-Frequency Current Observations off British Columbia with Coastal-Trapped Wave Theory

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4163541
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    contributor authorYao, T.
    contributor authorFreeland, Howard J.
    contributor authorMysak, Lawrence A.
    date accessioned2017-06-09T14:46:52Z
    date available2017-06-09T14:46:52Z
    date copyright1984/01/01
    date issued1984
    identifier issn0022-3670
    identifier otherams-26626.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4163541
    description abstractSix current-meter mooring were deployed in a line approximately 600 km in length along the continental shelf of British Columbia. Analysis of the low frequency (periods exceeding a day) fluctuations in current for the winter 1981?82 period is discussed. Alongshore currents off Vancouver Island are mutually correlated with time lag less than a day. The region of mutual correlation does not extend north of Vancouver Island, across Queen Charlotte Sound. Coherence is observed between currents south and north of Queen Charlotte Sound only in a frequency band where there is mutual coherence with local wind. A comparison is made between observation and free coastal-trapped wave theory. Off northern Vancouver Island, where the shelf is narrower than off southern Vancouver Island, there is increased vertical shear, a feature of the second coastal-trapped wave mode. A consistency test is applied using the cross spectral matrix of alongshore components of velocity. In the dominant energy-containing frequency bands (periods ?10 days), the structure of alongshore currents off Vancouver Island is consistent with the two lowest free coastal-trapped wave modes locked in phase.
    publisherAmerican Meteorological Society
    titleA Comparison of Low-Frequency Current Observations off British Columbia with Coastal-Trapped Wave Theory
    typeJournal Paper
    journal volume14
    journal issue1
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/1520-0485(1984)014<0022:ACOLFC>2.0.CO;2
    journal fristpage22
    journal lastpage34
    treeJournal of Physical Oceanography:;1984:;Volume( 014 ):;issue: 001
    contenttypeFulltext
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