Radiolarian-based paleotemperatures of ODP Site 177-1089 in the Atlantic Sector of the Southern Ocean ...

• Main Authors: Cortese, Giuseppe, Abelmann, Andrea
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2002
• Subjects: Composite Core; MultiCorer; Giant box corer; Water sample; Plankton net; MiniCorer; Multiple opening/closing net; Gravity corer Kiel type; Leg177; M23/1; ANT-IV/3; ANT-IV/4; ANT-VIII/3; ANT-VIII/6; ANT-IX/2; ANT-IX/4; ANT-X/5; ANT-XI/2; ANT-XI/4; Joides Resolution; Meteor 1986; Polarstern; Ocean Drilling Program ODP; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.706557; https://doi.pangaea.de/10.1594/PANGAEA.706557

Two cores, Site 1089 (ODP Leg 177) and PS2821-1, recovered from the same location (40°56'S; 9°54'E) at the Subtropical Front (STF) in the Atlantic Sector of the Southern Ocean, provide a high-resolution climatic record, with an average temporal resolution of less than 600 yr. A multi-proxy approach was used to produce an age model for Core PS2821-1, and to correlate the two cores. Both cores document the last climatic cycle, from Marine Isotopic Stage 6 (MIS 6, ca. 160 kyr BP, ka) to present. Summer sea-surface temperatures (SSSTs) have been estimated, with a standard error of ca. +/-1.16°C, for the down core record by using Q-mode factor analysis (Imbrie and Kipp method). The paleotemperatures show a 7°C warming at Termination II (last interglacial, transition from MIS 6 to MIS 5). This transition from glacial to interglacial paleotemperatures (with maximum temperatures ca. 3°C warmer than present at the core location) occurs earlier than the corresponding shift in delta18O values for benthic foraminifera ... : Supplement to: Cortese, Giuseppe; Abelmann, Andrea (2002): Radiolarian-based paleotemperatures during the last 160 kyrs at ODP Site 1089 (Southern Ocean, Atlantic Sector). Palaeogeography, Palaeoclimatology, Palaeoecology, 182(3-4), 259-286 ...