(Table 2) Radiocarbon ages on Arctic box and multicores ...

• Main Authors: Cronin, Thomas M, Gemery, L, Briggs, W M, Jakobsson, Martin, Polyak, Leonid, Brouwers, E M
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: Event label; Latitude of event; Longitude of event; Elevation of event; Method/Device of event; Core; Laboratory; DEPTH, sediment/rock; Age, dated; Calendar age; Calendar age, standard deviation; Box corer; MultiCorer; Age, 14C AMS; Age, 14C milieu/reservoir corrected -440 yr; PI-94-AR; ARK-VIII/3; Polar Sea; Polarstern; International Polar Year 2007-2008 IPY; Arctic; Arctic Ocean; Mendeleyev; Morris Jesup Rise; Yermak Plateau; Iceland; International Polar Year; IPY; Sea ice; Yermak plateau
• Online Access: https://dx.doi.org/10.1594/pangaea.808564; https://doi.pangaea.de/10.1594/PANGAEA.808564

Paleo-sea-ice history in the Arctic Ocean was reconstructed using the sea-ice dwelling ostracode Acetabulastoma arcticum from late Quaternary sediments from the Mendeleyev, Lomonosov, and Gakkel Ridges, the Morris Jesup Rise and the Yermak Plateau. Results suggest intermittently high levels of perennial sea ice in the central Arctic Ocean during Marine Isotope Stage (MIS) 3 (25-45 ka), minimal sea ice during the last deglacial (16-11 ka) and early Holocene thermal maximum (11-5 ka) and increasing sea ice during the mid-to-late Holocene (5-0 ka). Sediment core records from the Iceland and Rockall Plateaus show that perennial sea ice existed in these regions only during glacial intervals MIS 2, 4, and 6. These results show that sea ice exhibits complex temporal and spatial variability during different climatic regimes and that the development of modern perennial sea ice may be a relatively recent phenomenon. ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...