Penultimate and last glacial oceanographic variations in the Bering Sea on millennial timescales ...

• Main Authors: Ovsepyan, Ekaterina, Ivanova, Elena V, Lembke-Jene, Lester, Max, Lars, Tiedemann, Ralf, Nürnberg, Dirk
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2017
• Subjects: Piston corer; SO201/2; Sonne; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Bering Sea; North Atlantic; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.873908; https://doi.pangaea.de/10.1594/PANGAEA.873908

We present high-resolution multi-proxy records from a marine sediment core (SO201-2-85KL) from the western Bering Sea to assess orbital- and millennial-scale paleoceanographic conditions during two last glacial intervals, including both terminations. Based on changes in foraminiferal assemblages, grain-size content and previously published TOC and d13C records, we reconstruct variations in sea-surface biological productivity, intermediate-water oxygenation and sea-ice conditions during the last 180 kyr. Our data demonstrate remarkable differences between the penultimate (MIS 6) and last (MIS 4-2) glacial. Relatively high sea surface bioproductivity and reduced sea-ice cover are reconstructed for the penultimate glacial interval, whereas low bioproductivity and expanded sea-ice cover appear to be typical for the last glacial. Millennial-scale changes in intermediate water ventilation are inferred from faunal records for the middle part of the penultimate glacial. High-amplitude environmental variability ... : Supplement to: Ovsepyan, Ekaterina; Ivanova, Elena V; Lembke-Jene, Lester; Max, Lars; Tiedemann, Ralf; Nürnberg, Dirk (2017): Penultimate and last glacial oceanographic variations in the Bering Sea on millennial timescales: Links to North Atlantic climate. Quaternary Science Reviews, 163, 135-151 ...