Planktonic foraminifera as recorders of past surface-water stratification

Research Article| April 01, 1997 Planktonic foraminifera as recorders of past surface-water stratification Stefan Mulitza; Stefan Mulitza 1Fachbereich Geowissenschaften, Universität Bremen, D-28334 Bremen, Germany Search for other works by this author on: GSW Google Scholar Anke Dürkoop; Anke Dürkoop 1Fachbereich Geowissenschaften, Universität Bremen, D-28334 Bremen, Germany Search for other works by this author on: GSW Google Scholar Walter Hale; Walter Hale 1Fachbereich Geowissenschaften, Universität Bremen, D-28334 Bremen, Germany Search for other works by this author on: GSW Google Scholar Gerold Wefer; Gerold Wefer 1Fachbereich Geowissenschaften, Universität Bremen, D-28334 Bremen, Germany Search for other works by this author on: GSW Google Scholar Hans Stefan Niebler Hans Stefan Niebler 2Alfred Wegener Institute for Polar and Marine Research, D-27515 Bremerhaven, Germany Search for other works by this author on: GSW Google Scholar Author and Article Information Stefan Mulitza 1Fachbereich Geowissenschaften, Universität Bremen, D-28334 Bremen, Germany Anke Dürkoop 1Fachbereich Geowissenschaften, Universität Bremen, D-28334 Bremen, Germany Walter Hale 1Fachbereich Geowissenschaften, Universität Bremen, D-28334 Bremen, Germany Gerold Wefer 1Fachbereich Geowissenschaften, Universität Bremen, D-28334 Bremen, Germany Hans Stefan Niebler 2Alfred Wegener Institute for Polar and Marine Research, D-27515 Bremerhaven, Germany Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1997) 25 (4): 335–338. https://doi.org/10.1130/0091-7613(1997)025<0335:PFAROP>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Stefan Mulitza, Anke Dürkoop, Walter Hale, Gerold Wefer, Hans Stefan Niebler; Planktonic foraminifera as recorders of past surface-water stratification. Geology 1997;; 25 (4): 335–338. doi: https://doi.org/10.1130/0091-7613(1997)025<0335:PFAROP>2.3.CO;2 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 The δ18O difference between shallow- and deep-living planktonic foraminifera is a proxy for the stratification of surface waters. In Holocene sediments from the Atlantic this difference increases from about 0‰ in subpolar regions to ∼3‰ in the tropics. The δ18O values of the shallow dwellers Globigerinoides sacculifer and Neogloboquadrina pachyderma mainly reflect surface-water conditions. The calcification depth of the deep-living species Globorotalia truncatulinoides (right-coiling) is affected by the stratification of the water column. In the subtropics, shell formation of G. truncatulinoides (right-coiling) begins in weakly stratified surface waters. In the tropics, the initial shell is secreted below the mixed layer. This hydrographically induced difference in calcification depth allows the use of the isotopic difference between G. truncatulinoides and the shallow species as a proxy for the stratification of surface waters. The Δδ18O between G. truncatulinoides and G. sacculifer from tropical gravity Core GeoB 1523-1 was significantly lower during isotope stage 2. This suggests that the glacial temperature stratification of western equatorial Atlantic surface waters was significantly reduced relative to the Holocene. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.