• Login
    About WHOAS
    View Item 
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • Geology and Geophysics (G&G)
    • View Item
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • Geology and Geophysics (G&G)
    • 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

    Regional climate variability in the western subtropical North Atlantic during the past two millennia

    Thumbnail
    View/Open
    2010PA002038.pdf (600.5Kb)
    Date
    2011-04-21
    Author
    Saenger, Casey P.  Concept link
    Came, Rosemarie E.  Concept link
    Oppo, Delia W.  Concept link
    Keigwin, Lloyd D.  Concept link
    Cohen, Anne L.  Concept link
    Metadata
    Show full item record
    Citable URI
    https://hdl.handle.net/1912/4608
    As published
    https://doi.org/10.1029/2010PA002038
    DOI
    10.1029/2010PA002038
    Keyword
     North Atlantic; Regional paleoclimate; LIA; MCA; NAO 
    Abstract
    Western subtropical North Atlantic oceanic and atmospheric circulations connect tropical and subpolar climates. Variations in these circulations can generate regional climate anomalies that are not reflected in Northern Hemisphere averages. Assessing the significance of anthropogenic climate change at regional scales requires proxy records that allow recent trends to be interpreted in the context of long-term regional variability. We present reconstructions of Gulf Stream sea surface temperature (SST) and hydrographic variability during the past two millennia based on the magnesium/calcium ratio and oxygen isotopic composition of planktic foraminifera preserved in two western subtropical North Atlantic sediment cores. Reconstructed SST suggests low-frequency variability of ∼1°C during an interval that includes the Medieval Climate Anomaly (MCA) and the Little Ice Age (LIA). A warm interval near 1250 A.D. is distinct from regional and hemispheric temperature, possibly reflecting regional variations in ocean-atmosphere heat flux associated with changes in atmospheric circulation (e.g., the North Atlantic Oscillation) or the Atlantic Meridional Overturning Circulation. Seawater δ 18O, which is marked by a fresher MCA and a more saline LIA, covaries with meridional migrations of the Atlantic Intertropical Convergence Zone. The northward advection of tropical salinity anomalies by mean surface currents provides a plausible mechanism linking Carolina Slope and tropical Atlantic hydrology.
    Description
    Author Posting. © American Geophysical Union, 2011. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 26 (2011): PA2206, doi:10.1029/2010PA002038.
    Collections
    • Geology and Geophysics (G&G)
    Suggested Citation
    Paleoceanography 26 (2011): PA2206
     

    Related items

    Showing items related by title, author, creator and subject.

    • Thumbnail

      CTD stations from the R/V Atlantic Explorer AE0922 in the North Atlantic, Bermuda BATS region during 2009 (TZEX project) 

      Buesseler, Kenneth O.; Lamborg, Carl; Lomas, Michael W.; Siegel, David; Steinberg, Deborah K.; Valdes, Jim (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2020-12-09)
      CTD stations from the R/V Atlantic Explorer AE0922 in the North Atlantic, Bermuda BATS region during 2009 (TZEX project) For a complete list of measurements, refer to the full dataset description in the supplemental file ...
    • Thumbnail

      Cruise event log from the R/V Atlantic Explorer AE0922 cruise in the North Atlantic, Bermuda BATS region during 2009 (TZEX project) 

      Buesseler, Kenneth O.; Lamborg, Carl; Lomas, Michael W.; Siegel, David; Steinberg, Deborah K.; Valdes, Jim (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2020-12-09)
      Cruise event log from the R/V Atlantic Explorer AE0922 cruise in the North Atlantic, Bermuda BATS region during 2009 (TZEX project) For a complete list of measurements, refer to the full dataset description in the ...
    • Thumbnail

      Cruise event log from the R/V Atlantic Explorer AE0922 cruise in the North Atlantic, Bermuda BATS region during 2009 (TZEX project) 

      Buesseler, Kenneth O.; Lamborg, Carl; Lomas, Michael W.; Siegel, David; Steinberg, Deborah K.; Valdes, Jim (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2020-12-09)
      Cruise event log from the R/V Atlantic Explorer AE0922 cruise in the North Atlantic, Bermuda BATS region during 2009 (TZEX project) For a complete list of measurements, refer to the full dataset description in the ...
    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