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    An Alternative Hypothesis for the Origin of the “Mediterranean” Salt Lens Observed off the Bahamas in the Fall of 1976

    Source: Journal of Physical Oceanography:;1999:;Volume( 029 ):;issue: 008::page 2103
    Author:
    Prater, Mark D.
    ,
    Rossby, Tom
    DOI: 10.1175/1520-0485(1999)029<2103:AAHFTO>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: A hypothesis is presented that the original salt lens, or ?meddy,? observed off the Bahamas in the fall of 1976 may have been formed, not near the Mediterranean outflow, but instead in the vicinity of the northwest corner (51°N, 43°W) of the North Atlantic Current. An eddy was observed near the northwest corner by an isopycnal RAFOS float deployed during the 1993?95 North Atlantic Current Experiment, and had nearly identical temperature/salinity properties as those of the Bahamas lens. Hydrographic evidence of thick homogeneous layers with similar properties near the northwest corner suggest a possible formation mechanism by which surface eddies containing warm and saline waters are cooled and subducted. A plausible scenario is made whereby a northwest corner eddy might be advected southward in the Newfoundland Basin by the flow around the high pressure ridge east of the North Atlantic Current and then enter the recirculation gyre immediately south of the Gulf Stream. Such an eddy could be advected to the site of the Bahamas lens in just three years, perhaps much more quickly than an eddy of Mediterranean origin and without encountering the topographic barrier of the Mid-Atlantic Ridge. This conclusion is ironic because the Bahamas lens is considered the first observation of an eddy of Mediterranean origin, and led to the coining of the term ?meddy.?
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      An Alternative Hypothesis for the Origin of the “Mediterranean” Salt Lens Observed off the Bahamas in the Fall of 1976

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    contributor authorPrater, Mark D.
    contributor authorRossby, Tom
    date accessioned2017-06-09T14:53:37Z
    date available2017-06-09T14:53:37Z
    date copyright1999/08/01
    date issued1999
    identifier issn0022-3670
    identifier otherams-29097.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4166286
    description abstractA hypothesis is presented that the original salt lens, or ?meddy,? observed off the Bahamas in the fall of 1976 may have been formed, not near the Mediterranean outflow, but instead in the vicinity of the northwest corner (51°N, 43°W) of the North Atlantic Current. An eddy was observed near the northwest corner by an isopycnal RAFOS float deployed during the 1993?95 North Atlantic Current Experiment, and had nearly identical temperature/salinity properties as those of the Bahamas lens. Hydrographic evidence of thick homogeneous layers with similar properties near the northwest corner suggest a possible formation mechanism by which surface eddies containing warm and saline waters are cooled and subducted. A plausible scenario is made whereby a northwest corner eddy might be advected southward in the Newfoundland Basin by the flow around the high pressure ridge east of the North Atlantic Current and then enter the recirculation gyre immediately south of the Gulf Stream. Such an eddy could be advected to the site of the Bahamas lens in just three years, perhaps much more quickly than an eddy of Mediterranean origin and without encountering the topographic barrier of the Mid-Atlantic Ridge. This conclusion is ironic because the Bahamas lens is considered the first observation of an eddy of Mediterranean origin, and led to the coining of the term ?meddy.?
    publisherAmerican Meteorological Society
    titleAn Alternative Hypothesis for the Origin of the “Mediterranean” Salt Lens Observed off the Bahamas in the Fall of 1976
    typeJournal Paper
    journal volume29
    journal issue8
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/1520-0485(1999)029<2103:AAHFTO>2.0.CO;2
    journal fristpage2103
    journal lastpage2109
    treeJournal of Physical Oceanography:;1999:;Volume( 029 ):;issue: 008
    contenttypeFulltext
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