(Table 1) Age determination of sediment core KC073 ...

• Main Authors: Allen, Claire Susannah, Pike, Jennifer, Pudsey, Carol J, Leventer, Amy
• Format: Dataset
• Language: English
• Published: PANGAEA 2005
• Subjects: Laboratory code/label; DEPTH, sediment/rock; Depth, top/min; Depth, bottom/max; Age, dated; Age, dated standard deviation; Carbon; Calendar age, maximum/old; Calendar age, minimum/young; Calendar age; Calendar age, standard deviation; Kasten corer; Age, 14C AMS; Age, 14C calibrated, CALIB 4.4 Stuiver et al., 2003; Antarc*; Antarctic; NADW; North Atlantic Deep Water; North Atlantic; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.837085; https://doi.pangaea.de/10.1594/PANGAEA.837085

We present a high-resolution paleoceanographic record of deglaciation based on diatom assemblages from a core located just south of the Polar Front in the southwest Atlantic. Core KC073 is from a sediment drift at the mouth of the Falkland Trough and contains sediments from the Last Glacial Maximum (LGM) to present, dated using radiocarbon dates on bulk organic matter and radiolarian stratigraphy. The site lies along the path of the Antarctic Circumpolar Current (ACC) and immediately downstream of where North Atlantic Deep Water (NADW) is entrained into the ACC. Significant variations in ocean conditions are reflected in high-amplitude changes in diatom concentrations and assemblage composition. The diatom assemblage at the LGM indicates that winter sea ice extent was at least 5° farther north than present until at least 19.0 ka (calendar years) and summer sea ice may have occasionally extended over the site, but for the most part it lay to the south. During deglaciation, Chaetoceros resting spores (CRS) ... : Age corrected using the regional 14C correction age of 1300 years B.P. and calibrated using CALIB 4.4. ...