Planktonic foraminifera of IODP Site 306-U1314 ...

• Main Authors: Alonso-Garcia, Montserrat, Sierro, Francisco Javier, Flores, José-Abel
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2011
• Subjects: Composite Core; Exp306; Joides Resolution; Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; Arctic; Foraminifera*; Neogloboquadrina pachyderma; North Atlantic; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.775846; https://doi.pangaea.de/10.1594/PANGAEA.775846

Surface water conditions at the Integrated Ocean Drilling Program (IODP) Site U1314 (Southern Gardar Drift, 56° 21.8' N, 27° 53.3' W, 2820 m depth) were inferred using planktic foraminifer assemblages between Marine Isotope Stage (MIS) 19 and 11 (ca. 800-400 ka). Factor analysis of the planktic foraminifer assemblages suggests that the assemblage was controlled by three factors. The first factor (which explained 49% of the variance) is dominated by transitional and subpolar species and points to warm and salty surface water conditions (Atlantic water). The second factor (37%) is dominated by Neogloboquadrina pachyderma sin and has been associated with the presence of cold and low saline surface waters (Arctic water). Finally, the third factor (9%), linked to a significant presence of Turborotalita quinqueloba, reflects the closeness of the Arctic front (the boundary between Atlantic and Arctic water). The position of the Arctic and Polar fronts has been estimated across the glacial-interglacial cycles ... : Supplement to: Alonso-Garcia, Montserrat; Sierro, Francisco Javier; Flores, José-Abel (2011): Arctic front shifts in the subpolar North Atlantic during the Mid-Pleistocene (800–400 ka) and their implications for ocean circulation. Palaeogeography, Palaeoclimatology, Palaeoecology, 311(3-4), 268-280 ...