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    Eddy-Induced Particle Dispersion in the Near-Surface North Atlantic

    Source: Journal of Physical Oceanography:;2012:;Volume( 042 ):;issue: 012::page 2206
    Author:
    Rypina, Irina I.
    ,
    Kamenkovich, Igor
    ,
    Berloff, Pavel
    ,
    Pratt, Lawrence J.
    DOI: 10.1175/JPO-D-11-0191.1
    Publisher: American Meteorological Society
    Abstract: his study investigates the anisotropic properties of the eddy-induced material transport in the near-surface North Atlantic from two independent datasets, one simulated from the sea surface height altimetry and one derived from real-ocean surface drifters, and systematically examines the interactions between the mean- and eddy-induced material transport in the region. The Lagrangian particle dispersion, which is widely used to characterize the eddy-induced tracer fluxes, is quantified by constructing the ?spreading ellipses.? The analysis consistently demonstrates that this dispersion is spatially inhomogeneous and strongly anisotropic. The spreading is larger and more anisotropic in the subtropical than in the subpolar gyre, and the largest ellipses occur in the Gulf Stream vicinity. Even at times longer than half a year, the spreading exhibits significant nondiffusive behavior in some parts of the domain. The eddies in this study are defined as deviations from the long-term time-mean. The contributions from the climatological annual cycle, interannual, and subannual (shorter than one year) variability are investigated, and the latter is shown to have the strongest effect on the anisotropy of particle spreading. The influence of the mean advection on the eddy-induced particle spreading is investigated using the ?eddy-following-full-trajectories? technique and is found to be significant. The role of the Ekman advection is, however, secondary. The pronounced anisotropy of particle dispersion is expected to have important implications for distributing oceanic tracers, and for parameterizing eddy-induced tracer transfer in non-eddy-resolving models.
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      Eddy-Induced Particle Dispersion in the Near-Surface North Atlantic

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    contributor authorRypina, Irina I.
    contributor authorKamenkovich, Igor
    contributor authorBerloff, Pavel
    contributor authorPratt, Lawrence J.
    date accessioned2017-06-09T17:19:08Z
    date available2017-06-09T17:19:08Z
    date copyright2012/12/01
    date issued2012
    identifier issn0022-3670
    identifier otherams-83094.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4226281
    description abstracthis study investigates the anisotropic properties of the eddy-induced material transport in the near-surface North Atlantic from two independent datasets, one simulated from the sea surface height altimetry and one derived from real-ocean surface drifters, and systematically examines the interactions between the mean- and eddy-induced material transport in the region. The Lagrangian particle dispersion, which is widely used to characterize the eddy-induced tracer fluxes, is quantified by constructing the ?spreading ellipses.? The analysis consistently demonstrates that this dispersion is spatially inhomogeneous and strongly anisotropic. The spreading is larger and more anisotropic in the subtropical than in the subpolar gyre, and the largest ellipses occur in the Gulf Stream vicinity. Even at times longer than half a year, the spreading exhibits significant nondiffusive behavior in some parts of the domain. The eddies in this study are defined as deviations from the long-term time-mean. The contributions from the climatological annual cycle, interannual, and subannual (shorter than one year) variability are investigated, and the latter is shown to have the strongest effect on the anisotropy of particle spreading. The influence of the mean advection on the eddy-induced particle spreading is investigated using the ?eddy-following-full-trajectories? technique and is found to be significant. The role of the Ekman advection is, however, secondary. The pronounced anisotropy of particle dispersion is expected to have important implications for distributing oceanic tracers, and for parameterizing eddy-induced tracer transfer in non-eddy-resolving models.
    publisherAmerican Meteorological Society
    titleEddy-Induced Particle Dispersion in the Near-Surface North Atlantic
    typeJournal Paper
    journal volume42
    journal issue12
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/JPO-D-11-0191.1
    journal fristpage2206
    journal lastpage2228
    treeJournal of Physical Oceanography:;2012:;Volume( 042 ):;issue: 012
    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