10.1594/PANGAEA.733972
Sikes, Elisabeth L
Elisabeth L
Sikes
0000-0003-2900-3283
Keigwin, Lloyd D
Lloyd D
Keigwin
Curry, William B
William B
Curry
Stable carbon and oxygen isotope record of Cibicidoides from DSDP/ODP holes
PANGAEA
1991
Drilling/drill rig
Leg68
Leg94
Leg108
Glomar Challenger
Joides Resolution
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
1979-09-06T00:00:00/1986-04-04T19:00:00
en
Supplementary Publication Series of Datasets
10.1029/90PA02499
3 datasets
application/zip
Creative Commons Attribution 3.0 Unported
High-resolution delta18O records from the equatorial Pacific (site 503B), equatorial Atlantic (site 665A), and North Atlantic (site 606A) based on the benthic foraminifera Cibicidoides wuellerstorfi show the 2.4 Ma onset of major northern hemispheric glaciation to be a package of three events occurring at 2.39, 2.35, and 2.31 Ma in which a periodicity of about 40 kyr is evident. The amplitude of the signals at the three sites indicates that these events were 1/2 to 2/3 the size of the latest Quaternary glaciation and also indicates cooling of northern source bottom water by 2.7°-4.1°C relative to southern source water during glaciations. Carbon isotopes indicate that southern source waters were less oxygenated than in the Quaternary and that there was reduced production of northern source water during glacial intervals. The dominant presence of southern source water in the eastern basin of the equatorial Atlantic, regardless of climatic cycles, throughout the late Pliocene indicates a greater influence of these waters relative to northern source waters in the late Pliocene ocean.
Supplement to: Sikes, Elisabeth L; Keigwin, Lloyd D; Curry, William B (1991): Pliocene paleoceanography: circulation and oceanographic changes associated with the 2.4 Ma glacial event. Paleoceanography, 6(2), 245-257
-95.63869999999997
-19.6678
2.9512
37.3382
North Pacific/FLANK
North Atlantic/FLANK
South Atlantic Ocean