Mid-Pleistocene (800-400 ka) records of benthic and planktic foraminfer δ¹⁸O and δ¹³C, planktic foraminifer based SST, and IRD of IODP Site 306-U1314 ...

• Main Authors: Alonso-Garcia, Montserrat, Sierro, Francisco Javier, Kucera, Michal, Flores, José-Abel, Cacho, Isabel, Andersen, Nils
• 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; Greenland; Nils; Greenland Sea; Ice Sheet; Iceland; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.820282; https://doi.pangaea.de/10.1594/PANGAEA.820282

Stable carbon and oxygen isotopes from benthic and planktic foraminifers, planktic foraminifer assemblages and ice rafted debris from the North Atlantic Site U1314 (Integrated Ocean Drilling Program Expedition 306) were examined to investigate orbital and millennial-scale climate variability in the North Atlantic and its impact on global circulation focusing on the development of glacial periods during the mid-Pleistocene (ca 800-400 ka). Glacial initiations were characterized by a rapid cooling (6-10 °C in less than 7 kyr) in the mean annual sea surface temperature (SST), increasing benthic d18O values and high benthic d13C values. The continuous increase in benthic d18O suggests a continuous ice sheet growth whereas the positive benthic d13C values indicate that the flow of the Iceland Scotland Overflow water (ISOW) was vigorous. Strong deep water formation in the Norwegian Greenland Sea promoted a high transfer of freshwater from the ocean to the continents. However, low SSTs at Site U1314 suggest a ... : Supplement to: Alonso-Garcia, Montserrat; Sierro, Francisco Javier; Kucera, Michal; Flores, José-Abel; Cacho, Isabel; Andersen, Nils (2011): Ocean circulation, ice sheet growth and interhemispheric coupling of millennial climate variability during the mid-Pleistocene (ca 800–400ka). Quaternary Science Reviews, 30(23-24), 3234-3247 ...