(Table 2) Radiocarbon ages of eastern equatorial Pacific sediment cores ...

• Main Authors: Koutavas, Athanasios, Lynch-Stieglitz, Jean
• Format: Dataset
• Language: English
• Published: PANGAEA 2003
• Subjects: Elevation of event; Latitude of event; Longitude of event; Event label; DEPTH, sediment/rock; Age, dated; Age, difference error; Calendar age; Calendar age, maximum/old; Calendar age, minimum/young; Laboratory code/label; Piston corer; Age, 14C AMS; Age, 14C calibrated, CALIB 4.3 Stuiver et al., 1998; RC08; RC11; RC13; V19; V21; Robert Conrad; Vema; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.841354; https://doi.pangaea.de/10.1594/PANGAEA.841354

We use planktonic oxygen isotope (d18O) records spanning the last 30,000 years (kyr) to constrain the magnitude and spatial pattern of glacial cooling in the upwelling environment of the eastern equatorial Pacific (EEP). Fourteen new downcore d18O records were obtained from surface-dwelling planktonic foraminifera Globigerinoides sacculifer and Globigerinoides ruber in eight cores from the upwelling tongue of the EEP. All sites have sedimentation rates exceeding 5 cm/kyr and, with one exception, lie above the modern depth of the foraminiferal lysocline. Sites directly underlying the cool band of upwelling immediately south of the equator record mean late Holocene (LH)-Last Glacial Maximum (LGM) d18O amplitudes ranging between 1.0 and 1.3 per mil. We estimate that mean sea surface temperatures (SST) in this region during the LGM were on average 1.5 ± 0.5°C lower than the LH. Larger d18O amplitudes are observed in sites north of the equator, indicating a spatial pattern of reduced meridional SST gradient ... : Data of RC11-238 previously published in Faul et al. (2000). All measurements were made on monospecific foraminiferal samples comprised of N. dutertrei shells, except the 400 cm sample from core V21-30 where a mix of N. dutertrei and O. universa was used. ...