• Login
    About WHOAS
    View Item 
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • Adminstration
    • View Item
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • Adminstration
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of WHOASCommunities & CollectionsBy Issue DateAuthorsTitlesKeywordsThis CollectionBy Issue DateAuthorsTitlesKeywords

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Deep North Atlantic last glacial maximum salinity reconstruction

    Thumbnail
    View/Open
    Article (863.9Kb)
    Supporting_Information_S1 (315.5Kb)
    Date
    2021-04-24
    Author
    Homola, Kira  Concept link
    Spivack, Arthur J.  Concept link
    Murray, Richard W.  Concept link
    Pockalny, Robert  Concept link
    D'Hondt, Steven  Concept link
    Robinson, Rebecca  Concept link
    Metadata
    Show full item record
    Citable URI
    https://hdl.handle.net/1912/27654
    As published
    https://doi.org/10.1029/2020PA004088
    DOI
    10.1029/2020PA004088
    Keyword
     Carbon cycle; Climate change; Deep water; Glaciation; Meridional overturning circulation; Paleosalinity; Porewater 
    Abstract
    We reconstruct deep water-mass salinities and spatial distributions in the western North Atlantic during the Last Glacial Maximum (LGM, 19–26 ka), a period when atmospheric CO2 was significantly lower than it is today. A reversal in the LGM Atlantic meridional bottom water salinity gradient has been hypothesized for several LGM water-mass reconstructions. Such a reversal has the potential to influence climate, ocean circulation, and atmospheric CO2 by increasing the thermal energy and carbon storage capacity of the deep ocean. To test this hypothesis, we reconstructed LGM bottom water salinity based on sedimentary porewater chloride profiles in a north-south transect of piston cores collected from the deep western North Atlantic. LGM bottom water salinity in the deep western North Atlantic determined by the density-based method is 3.41–3.99 ± 0.15% higher than modern values at these sites. This increase is consistent with: (a) the 3.6% global average salinity change expected from eustatic sea level rise, (b) a northward expansion of southern sourced deep water, (c) shoaling of northern sourced deep water, and (d) a reversal of the Atlantic's north-south deep water salinity gradient during the LGM.
    Description
    Author Posting. © American Geophysical Union, 2021. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography and Paleoclimatology 36(7), (2021): e2020PA004088, https://doi.org/10.1029/2020PA004088.
    Collections
    • Adminstration
    Suggested Citation
    Homola, K., Spivack, A. J., Murray, R. W., Pockalny, R., D’Hondt, S., & Robinson, R. (2021). Deep North Atlantic last glacial maximum salinity reconstruction. Paleoceanography and Paleoclimatology, 36(7), e2020PA004088.
     
    All Items in WHOAS are protected by original copyright, with all rights reserved, unless otherwise indicated. WHOAS also supports the use of the Creative Commons licenses for original content.
    A service of the MBLWHOI Library | About WHOAS
    Contact Us | Send Feedback | Privacy Policy
    Core Trust Logo