Penultimate and last glacial oceanographic variations in the Bering Sea on millennial timescales ...
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, gr...
| Main Authors: | , , , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
PANGAEA
2017
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.873908 https://doi.pangaea.de/10.1594/PANGAEA.873908 |
| Summary: | 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 ... |
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