Foraminifer, diatom frustules, and total organic carbon of sediment cores EMB046_6-5GC, EMB046_10-4GC, and EMB046_20-3GC in the Norwegian Trench and the Skagerrak ...

• Main Authors: Polovodova Asteman, Irina, Risebrobakken, Bjørg, Moros, Matthias, Binczewska, Anna, Dobosz, Slawomir, Jansen, Eystein, Slawinska, Joanna, Bak, Malgorzata
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2017
• Subjects: Nordic Seas; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.874853; https://doi.pangaea.de/10.1594/PANGAEA.874853

To detect climatic linkages between the Baltic Sea, the Skagerrak and the Nordic Seas, we present multi‐proxy reconstructions covering the last 4500 years from three sediment cores taken in the Skagerrak and along the SW Norwegian margin. Foraminiferal assemblages at all three sites show a distinct change at c. 1700 years BP, associated with a transition from absence and rare occurrence of Brizalina skagerrakensis during c. 4500–2300 years BP to its subsequent abundance increase, suggesting a stronger influence of nutrient‐rich water‐masses during the last c. 1700 years. Increased nutrient availability, which probably stimulated higher primary productivity, is further supported by an increase in diatoms, total organic carbon and benthic foraminiferal species indicative of high productivity and carbon fluxes during the last c. 1700 years as compared to c. 4500–2300 years BP. The amplitude of the B. skagerrakensis signal is largest in the central Skagerrak and gradually becomes smaller towards the Norwegian ... : The reconstruction of the late Holocene palaeoproductivity changes in the Skagerrak and the Norwegian Trench provides data of multiple proxies: benthic foraminifera, planktonic foraminifera, diatoms and total organic carbon (TOC) analyzed in 3 sediment cores: EMB046/6-5GC, EMB046/10-4GC and EMB046/20-3GC.The data are given as nine files: 3 separate files (foraminifera, diatom and TOC) for each of the cores. Benthic foraminiferal data are presented as relative abundances (%) of Brizallina skagerrakensis and absolute abundances of palaeoproductivity species, low oxygen species, agglutinated taxa and total benthic foraminifera. Palaeoproductivity species include: Alabaminella weddelensis, Brizalina skagerrakensis, Bulimina marginata, Epistominella exigua, Epistominella vitrea, Nonionella iridea, Uvigerina mediterrannea and Uvigerina peregrina. Low oxygen species are grouped by summing together species Adercotryma glomerata, Ammodiscus spp., Bolivina spp., Buccella frigida, Globobulimina auriculata, ...