Foraminifer and IRD counts from ODP Site 162-983 ...

• Main Authors: Barker, Stephen, Knorr, Gregor, Conn, Stephen, Lordsmith, Sian, Newman, Dhobasheni, Thornalley, David J R
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: IRD; %NPS; ODP 983; pachyderma; Event label; Sample code/label; DEPTH, sediment/rock; Density, dry bulk; AGE; Sedimentation rate; Accumulation rate, mass; Size fraction > 0.063 mm, sand; Size fraction < 0.063 mm, mud, silt+clay; Split; Total counts; Foraminifera, planktic, whole test; Neogloboquadrina pachyderma sinistral; Ice rafted debris; Accumulation rate, ice rafted debris by number; Composite Core; Drilling/drill rig; Mass spectrometer VG Prism Series II; Calculated; Counting >150 µm fraction; Leg162; Joides Resolution; Ocean Drilling Program ODP; Neogloboquadrina pachyderma; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.904398; https://doi.pangaea.de/10.1594/PANGAEA.904398

Throughout the last glacial cycle millennial timescale variations in atmospheric CO2 occurred in parallel with perturbations in deep ocean circulation, which were themselves reflected by observable changes in surface conditions across the North Atlantic region. Here we use continuous proxy records to argue that an equivalent relationship has held throughout the last 800kyr i.e. since before the first occurrence of Heinrich events sensu stricto. Our results highlight the importance of internal climate dynamics in amplifying external (insolation) forcing on the climate system to produce the large amplitude of glacial terminations (deglaciations) during the mid to late Pleistocene. We show that terminations are characterized by an interval of intense ice rafting followed by a subsequent and abrupt shift to anomalously warm surface conditions (with respect to the more gradually evolving background state), which we interpret to reflect an abrupt recovery of deep ocean circulation in the Atlantic. According to our ... : Supplement to: Barker, Stephen; Knorr, Gregor; Conn, Stephen; Lordsmith, Sian; Newman, Dhobasheni; Thornalley, David J R (2019): Early Interglacial Legacy of Deglacial Climate Instability. Paleoceanography and Paleoclimatology, 34(8), 1455-1475 ...