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    Salinity change in the subtropical Atlantic : secular increase and teleconnections to the North Atlantic Oscillation

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    Article (524.3Kb)
    Additional file information (2.526Kb)
    Textual details of methodology used in this project (7.536Kb)
    U/Th ages and parameters used to calculate these ages (622bytes)
    Date
    2005-01-21
    Author
    Rosenheim, Brad E.  Concept link
    Swart, Peter K.  Concept link
    Thorrold, Simon R.  Concept link
    Eisenhauer, Anton  Concept link
    Willenz, Philippe  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/3319
    As published
    https://doi.org/10.1029/2004GL021499
    DOI
    10.1029/2004GL021499
    Abstract
    Recent studies comparing shipboard data between the 1950's and the 1990's have shown significant, heterogeneous adjustments of the temperature-salinity structure of the N. Atlantic Ocean. Here, we present proxy records of temperature and salinity from aragonite sclerosponge skeletons, extending existing records of the Salinity Maximum Waters (SMW) of the N. Atlantic back to 1890. These proxy records show secular temperature increases of 1.6–2.0°C, higher than published global averages, and salinity increases of 0.35–0.5 psu, smaller than short-term secular trends recently measured. Salinity reconstructions vary more significantly on the decadal scale, showing changes that are related to low-frequency variations of the North Atlantic Oscillation (NAO). On both secular and decadal time scales, the records indicate significant thermohaline changes in the SMW, either via forcing at the surface or increasing depths of density surfaces in the Bahamas.
    Description
    Author Posting. © American Geophysical Union, 2005. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 32 (2005): L02603, doi:10.1029/2004GL021499.
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    • Biology
    Suggested Citation
    Geophysical Research Letters 32 (2005): L02603
     

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