Figure 2. Barium excess of sediment core PS1506-1 ...

• Main Authors: Shimmield, Graham, Derrick, S, Mackensen, Andreas, Grobe, Hannes, Pudsey, Carol J
• Format: Dataset
• Language: English
• Published: PANGAEA 2009
• Subjects: DEPTH, sediment/rock; Barium excess; Gravity corer Kiel type; X-ray fluorescence XRF; ANT-V/4; Polarstern; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Antarc*; Antarctic; Scotia Sea; Southern Ocean; Weddell Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.730146; https://doi.pangaea.de/10.1594/PANGAEA.730146

Over the last decade many regional palaeoceanographic studies have found evidence for enhanced primary productivity during glacial episodes, particularly in the equatorial Pacific and off northwest Africa. These studies have given rise to the "glacial productivity hypothesis" which has suggested that enhanced oceanic biomass during glacial times supported an efficient removal of organic carbon from the euphotic zone, contributing to lower atmospheric CO2 levels recorded in ice cores. Recently, studies from the Southern Ocean have shown that south of the Antarctic Polar Front glacial palaeoproductivity was lower than during interglacial times. Here we present further evidence for enhanced interglacial productivity in the Southern Ocean using a transect of cores collected from the Scotia Sea and Weddell Sea. Biogenic silica, organic carbon and barium are presented as proxy indicators of past productivity. In order to establish such palaeoproductivity records for this region, where an absence of foraminifera ... : Data are retrodigitized from graf. ...