Grain size distribution, Ca/Fe ratios and elemental composition of sediment core GS13-182-CC, Norwegian continental margin

• Main Authors: Becker, Lukas W M, Sejrup, Hans Petter, Hjelstuen, Berit O, Haflidason, Haflidi, Kjennbakken, Heidi, Werner, Johannes P
• Format: Dataset
• Language: English
• Published: PANGAEA 2020
• Subjects: CALYPSO; Calypso Corer; G. O. Sars (2003); GS13-182; GS13-182-01CC; IMR2013105; Storegga Slide; Norwegian shelf; Norwegian Sea; Storegga; North Atlantic; North Atlantic oscillation
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.925437; https://doi.org/10.1594/PANGAEA.925437

The North Atlantic Oscillation is the dominant atmospheric driver of North Atlantic climate variability with phases corresponding to droughts and cold spells in Europe. Here, we exploit a suggested anti-correlation of North Atlantic Oscillation-phase and north-eastern North Atlantic primary productivity by investigation of south-eastern Norwegian Sea sediment cores spanning the last 8000 years. Age model uncertainties between 2 and 13 years for the period 1992-1850 AD allows for proxy to observational data calibration. Our data suggest that Ca/Fe core-scanning results reflect sedimentary CaCO3-variability in the region. Cross-correlating the Ca/Fe record with nearby phytoplankton counts and dissolved O2 data, suggests that Ca/Fe can be used as a proxy for primary productivity variability in the region. Our data support an anti-correlation of primary productivity to the winter North Atlantic Oscillation index. Hence, we propose a sub-decadally resolved palaeo-North Atlantic Oscillation reconstruction based on an open-ocean record spanning the last 8000 years.