Laminated sediment cores in the Bering Sea ...

• Main Authors: Kühn, Hartmut, Lembke-Jene, Lester, Lohmann, Gerrit, Gersonde, Rainer, Esper, Oliver, Arz, Helge Wolfgang, Kuhn, Gerhard, Tiedemann, Ralf
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2016
• Subjects: Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Bering Sea; Lester; Pacific; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.857851; https://doi.pangaea.de/10.1594/PANGAEA.857851

During the last glacial termination, the upper North Pacific Ocean underwent dramatic and rapid changes in oxygenation that lead to the transient intensification of oxygen minimum zones (OMZs), recorded by the widespread occurrence of laminated sediments on circum-Pacific continental margins. We present a new laminated sediment record from the mid-depth (1100 m) northern Bering Sea margin that provides insight into these deglacial OMZ maxima with exceptional, decadal-scale detail. Combined ultrahigh-resolution micro-X-ray-fluorescence (micro-XRF) data and sediment facies analysis of laminae reveal an alternation between predominantly terrigenous and diatom-dominated opal sedimentation. The diatomaceous laminae are interpreted to represent spring/summer productivity events related to the retreating sea ice margin.We identified five laminated sections in the deglacial part of our site. Lamina counts were carried out on these sections and correlated with the Bølling–Allerød and Preboreal phases in the North ... : Supplement to: Kühn, Hartmut; Lembke-Jene, Lester; Lohmann, Gerrit; Gersonde, Rainer; Esper, Oliver; Arz, Helge Wolfgang; Kuhn, Gerhard; Tiedemann, Ralf (submitted): Tidal forcing and ocean-atmosphere dynamics influence on productivity variations in the deglacial Bering Sea. Geophysical Research Letters ...