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    Phase Speed Cross Spectra of Eddy Heat Fluxes in the Eastern Pacific

    Source: Journal of Physical Oceanography:;2015:;Volume( 045 ):;issue: 005::page 1285
    Author:
    Abernathey, Ryan
    ,
    Wortham, Cimarron
    DOI: 10.1175/JPO-D-14-0160.1
    Publisher: American Meteorological Society
    Abstract: his study investigates the observed spectral character of eddy heat fluxes near the ocean surface, focusing on the distribution in wavenumber and phase speed space. Eddy heat fluxes in the eastern Pacific are calculated from concurrent satellite sea surface height and sea surface temperature data. A high-resolution coupled climate model is also analyzed in order to verify the physical mechanisms involved and to validate the model against observations. Wavenumber, frequency, and phase speed power spectra and cross spectra are constructed and presented as a function of latitude. These spectra reveal the dominance of coherent mesoscale eddies in both the length scale and phase speed of eddy heat fluxes. The breadths of the spectra are characterized via spectral moments; these moments show that the eddy fluxes are relatively concentrated around the dominant wavenumber and phase speed. Good agreement is found between the model and the observed spectra. The integrated heat transport and corresponding eddy diffusivity are shown to compare well with previous studies, but the results give a deeper insight into what determines the heat flux. Implications for eddy parameterization are discussed.
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      Phase Speed Cross Spectra of Eddy Heat Fluxes in the Eastern Pacific

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4226884
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    contributor authorAbernathey, Ryan
    contributor authorWortham, Cimarron
    date accessioned2017-06-09T17:21:01Z
    date available2017-06-09T17:21:01Z
    date copyright2015/05/01
    date issued2015
    identifier issn0022-3670
    identifier otherams-83637.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4226884
    description abstracthis study investigates the observed spectral character of eddy heat fluxes near the ocean surface, focusing on the distribution in wavenumber and phase speed space. Eddy heat fluxes in the eastern Pacific are calculated from concurrent satellite sea surface height and sea surface temperature data. A high-resolution coupled climate model is also analyzed in order to verify the physical mechanisms involved and to validate the model against observations. Wavenumber, frequency, and phase speed power spectra and cross spectra are constructed and presented as a function of latitude. These spectra reveal the dominance of coherent mesoscale eddies in both the length scale and phase speed of eddy heat fluxes. The breadths of the spectra are characterized via spectral moments; these moments show that the eddy fluxes are relatively concentrated around the dominant wavenumber and phase speed. Good agreement is found between the model and the observed spectra. The integrated heat transport and corresponding eddy diffusivity are shown to compare well with previous studies, but the results give a deeper insight into what determines the heat flux. Implications for eddy parameterization are discussed.
    publisherAmerican Meteorological Society
    titlePhase Speed Cross Spectra of Eddy Heat Fluxes in the Eastern Pacific
    typeJournal Paper
    journal volume45
    journal issue5
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/JPO-D-14-0160.1
    journal fristpage1285
    journal lastpage1301
    treeJournal of Physical Oceanography:;2015:;Volume( 045 ):;issue: 005
    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
    yabeshDSpacePersian