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    Anomalous Characteristics of Equatorial Thermohaline Finestructure

    Source: Journal of Physical Oceanography:;1981:;Volume( 011 ):;issue: 006::page 871
    Author:
    Toole, John M.
    DOI: 10.1175/1520-0485(1981)011<0871:ACOETF>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Finestructure observations gathered in the equatorial Pacific are discussed. The measurements consist of a 48 h CTD time series within the salinity front at the northern edge of the Equatorial Undercurrent at 110°W. The water column at depths shallower than 150 m at this site was dominated by intense inter-leaving. The vertical temperature and salinity gradient spectra from this depth range are strongly peaked at a wavelength of 20 m and the temperature-salinity anomalies are coherent and in phase at this scale. Yet, unlike the finestructure observed in fronts at higher latitudes, the finestructure is not density-compensating on any scale on account of an excess of temperature variance. Rather than interpret this equatorial finestructure as resulting from nearly isopycnal differential advection, it is suggested that the features may be the signature of low-frequency internal waves where lateral displacements are reflected in the salinity profiles and lateral and vertical displacements induce the temperature variability. If so, lateral mixing across the Equatorial Undercurrent may involve an interaction between internal waves and salt fingering as well as double-diffusively driven intrusions.
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      Anomalous Characteristics of Equatorial Thermohaline Finestructure

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    contributor authorToole, John M.
    date accessioned2017-06-09T14:45:54Z
    date available2017-06-09T14:45:54Z
    date copyright1981/06/01
    date issued1981
    identifier issn0022-3670
    identifier otherams-26241.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4163114
    description abstractFinestructure observations gathered in the equatorial Pacific are discussed. The measurements consist of a 48 h CTD time series within the salinity front at the northern edge of the Equatorial Undercurrent at 110°W. The water column at depths shallower than 150 m at this site was dominated by intense inter-leaving. The vertical temperature and salinity gradient spectra from this depth range are strongly peaked at a wavelength of 20 m and the temperature-salinity anomalies are coherent and in phase at this scale. Yet, unlike the finestructure observed in fronts at higher latitudes, the finestructure is not density-compensating on any scale on account of an excess of temperature variance. Rather than interpret this equatorial finestructure as resulting from nearly isopycnal differential advection, it is suggested that the features may be the signature of low-frequency internal waves where lateral displacements are reflected in the salinity profiles and lateral and vertical displacements induce the temperature variability. If so, lateral mixing across the Equatorial Undercurrent may involve an interaction between internal waves and salt fingering as well as double-diffusively driven intrusions.
    publisherAmerican Meteorological Society
    titleAnomalous Characteristics of Equatorial Thermohaline Finestructure
    typeJournal Paper
    journal volume11
    journal issue6
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/1520-0485(1981)011<0871:ACOETF>2.0.CO;2
    journal fristpage871
    journal lastpage876
    treeJournal of Physical Oceanography:;1981:;Volume( 011 ):;issue: 006
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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