Foraminiferal isotope ratios from IODP Site U1313

Large-amplitude millennial-scale climate oscillations have been identified in late Pleistocene climate archives from around the world. These oscillations appear to be of larger amplitude during times of enlarged ice sheets. This observation suggests the existence of a relationship between large-amplitude millennial variations in climate and extreme glacial conditions and therefore that the emergence of millennial-scale climate variability may be linked to the Pliocene intensification of northern hemisphere glaciation (iNHG). Here we test this hypothesis using new late Pliocene high-resolution (ab. 400 year) records of ice-rafted debris deposition and stable isotopes in planktic foraminiferal calcite (Globigerinoides ruber) generated from Integrated Ocean Drilling Program Site U1313 in the subpolar North Atlantic (a reoccupation of the classic Deep Sea Drilling Project Site 607). Our records span marine oxygen isotope stages (MIS) 103-95 (ab. 2600 to 2400 ka), the first interval during iNHG (ab. 3.5 to 2.5 Ma) in which large-amplitude glacial-interglacial cycles and inferred sea level changes occur. Our records reveal small-amplitude variability at periodicities of ab. 1.8 to 6.2 kyr that prevails regardless of (inter)glacial state with no significant amplification during the glacials MIS 100, 98, and 96. These findings imply that the threshold for the amplification of such variability to the proportions seen in the marine archive of the last glacial was not crossed during the late Pliocene and, in view of all available data, likely not until the Mid-Pleistocene Transition.

Data and Resources

This dataset has no data

Cite this as

Bolton, Clara T, Wilson, Paul A, Bailey, Ian, Friedrich, Oliver, Beer, Christopher J, Becker, Julia, Baranwal, Soma, Schiebel, Ralf (2011). Dataset: Foraminiferal isotope ratios from IODP Site U1313. https://doi.org/10.1594/PANGAEA.761444

DOI retrieved: 2011

Additional Info

Field Value
Imported on November 30, 2024
Last update November 30, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.761444
Author Bolton, Clara T
Given Name Clara T
Family Name Bolton
More Authors
Wilson, Paul A
Bailey, Ian
Friedrich, Oliver
Beer, Christopher J
Becker, Julia
Baranwal, Soma
Schiebel, Ralf
Source Creation 2011
Publication Year 2011
Resource Type application/zip - filename: Bolton_2011
Subject Areas
Name: Lithosphere

Name: Oceans

Name: Paleontology

Related Identifiers
Title: Millennial-scale climate variability in the subpolar North Atlantic Ocean during the late Pliocene
Identifier: https://doi.org/10.1029/2010PA001951
Type: DOI
Relation: IsSupplementTo
Year: 2010
Source: Paleoceanography
Authors: Bolton Clara T , Wilson Paul A , Bailey Ian , Friedrich Oliver , Beer Christopher J , Becker Julia , Baranwal Soma , Schiebel Ralf .