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    Observations of seasonal subduction at the Iceland-Faroe Front

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    Beaird_et_al-2016-Journal_of_Geophysical_Research__Oceans.pdf (9.108Mb)
    Date
    2016-06-12
    Author
    Beaird, Nicholas  Concept link
    Rhines, Peter B.  Concept link
    Eriksen, Charles C.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/8459
    As published
    https://doi.org/10.1002/2015JC011501
    DOI
    10.1002/2015JC011501
    Keyword
     Fronts; Subduction; Iceland Faroe Front; Iceland Faroe Ridge; Gliders 
    Abstract
    The polar front in the North Atlantic is bound to the ridge between Iceland and the Faroe Islands, where about one-half of the northward transport of warm Atlantic Water into the Nordic Seas occurs, as well as about one sixth of the equatorward dense overflow. We find a low salinity water mass at the surface of the Iceland-Faroe Front (IFF), which in wintertime subducts along outcropping isopycnals and is found in much modified form on the Atlantic side of the Iceland-Faroe Ridge (IFR) crest. The features found on the Atlantic side of the crest at depth have temperature and salinity characteristics which are clearly traceable to the surface outcrop of the IFF. The presence of coherent low salinity layers on the Atlantic side of the IFR crest has not been previously reported. Warm waters above the IFR primarily feed the Faroe Current, and injection of a low salinity water mass may play an early role in the water mass transformation taking place in the Nordic Seas. The seasonality of the intrusive features suggests a link between winter convection, mixed layer instability and deep frontal subduction. These low salinity anomalies (as well as a low oxygen water mass from the Iceland Basin) can be used as tracers of the intermediate circulation over the IFR.
    Description
    Author Posting. © American Geophysical Union, 2016. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 121 (2016): 4026–4040, doi:10.1002/2015JC011501.
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    • Physical Oceanography (PO)
    Suggested Citation
    Journal of Geophysical Research: Oceans 121 (2016): 4026–4040
     

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