Amplitude and timing of temperature and salinity variability in the subpolar North Atlantic over the past 10 k.y.

Abstract

Research Article| April 01, 2007 Amplitude and timing of temperature and salinity variability in the subpolar North Atlantic over the past 10 k.y. Rosemarie E. Came; Rosemarie E. Came 1Massachusetts Institute of Technology–Woods Hole Oceanographic Institution Joint Program in Oceanography, Woods Hole, Massachusetts 02543, USA Search for other works by this author on: GSW Google Scholar Delia W. Oppo; Delia W. Oppo 2Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA Search for other works by this author on: GSW Google Scholar Jerry F. McManus Jerry F. McManus 2Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Rosemarie E. Came 1Massachusetts Institute of Technology–Woods Hole Oceanographic Institution Joint Program in Oceanography, Woods Hole, Massachusetts 02543, USA Delia W. Oppo 2Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA Jerry F. McManus 2Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA Publisher: Geological Society of America Received: 03 Nov 2006 Revision Received: 17 Nov 2006 Accepted: 20 Nov 2006 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2007) 35 (4): 315–318. https://doi.org/10.1130/G23455A.1 Article history Received: 03 Nov 2006 Revision Received: 17 Nov 2006 Accepted: 20 Nov 2006 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Rosemarie E. Came, Delia W. Oppo, Jerry F. McManus; Amplitude and timing of temperature and salinity variability in the subpolar North Atlantic over the past 10 k.y.. Geology 2007;; 35 (4): 315–318. doi: https://doi.org/10.1130/G23455A.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Paired planktic foraminiferal δ18O and Mg/Ca data reveal trends of increasing temperatures (∼3 °C) and salinities in the subpolar North Atlantic over the course of the Holocene, which were punctuated by abrupt events. The trends likely reflect an insolation-forced northward retreat of the boundary between polar and North Atlantic subsurface waters. The superimposed variability does not appear to be periodic, but tends to recur within a broad millennial band. The records provide convincing evidence of open-ocean cooling (nearly 2 °C) and freshening during the 8.2 ka event, and suggest similar conditions at 9.3 ka. However, the two largest temperature oscillations in our record (∼2 °C) occurred during the past 4 k.y., suggesting a recent increase in temperature variability relative to the mid-Holocene, perhaps in response to neoglaciation, which began at about this time. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.