Age model and physical properties of sediment from the Arctic Siberian margin, core SWERUS-L2-31PC

Francesco Muschitiello, Matt O'Regan, Örjan Gustafsson, Jannik Martens

Age model and sedimentological data for a marine sediment core collected on the Lomonosov Ridge adjoining the East Siberian shelf, Arctic Ocean. The dataset includes porosity, magnetic susceptibility and organic carbon content measured at 1 cm intervals.

A 30,000 year age-depth model for the core is also provided. This is required to convert sediment depth to age. The age model is needed to generate meaningful time series on environmental changes in this region of the Arctic using other analytical approaches, and will therefore underpin future work on this sediment core.

The core was collected during the SWERUS-C3 expedition to the Arctic Ocean with the Swedish icebreaker Oden in 2014.

Citation

Francesco Muschitiello, Matt O'Regan, Örjan Gustafsson, Jannik Martens (2020) Age model and physical properties of sediment from the Arctic Siberian margin, core SWERUS-L2-31PC. Dataset version 1. Bolin Centre Database. https://doi.org/10.17043/oden-swerus-2014-sediment-l2-31pc-physprop-1

References

Muschitiello F, O'Regan M, Martens J, West G, Gustafsson Ö, Jakobsson M. (2019). A new 30,000 year chronology for rapidly deposited sediments on the Lomonosov Ridge using bulk radiocarbon dating and probabilistic stratigraphic alignment. Geochronology Discuss. https://doi.org/10.5194/gchron-2019-16

Data description

The dataset includes:

1. Age model of core SWERUS-L2-31PC on the Greenland Ice Core Chronology 2005 (GICC05) timescale.
2. Physical properties measured at 1 cm intervals with a GeoTek Multi-Sensor Core Logger: Porosity (%), Bulk Density (g/cm³) and Magnetic Susceptibility (MS1, SI × 10⁻⁵)
3. Organic carbon content (Corg, % wt) of the sediment.

The dataset is included in one spreadsheet (xlsx) file with three data tables. The same data are also included in three comma-separated values (csv) files. File content:

Age model

• Depth (m)
• Weighted mean age (GICC05 years b2k)
• Median age (GICC05 years b2k)
• Upper 99% credible interval (GICC05 years b2k)
• Lower 99% credible interval (GICC05 years b2k)

Physical properties

• Core
• Section
• Interval (cm)
• Depth (m)
• Weighted mean age (GICC05 years b2k)
• Porosity (% vol)
• Bulk Density (g/cm³)
• MS1 (SI × 10⁻⁵)

Organic carbon

• Depth (m)
• Weighted mean age (GICC05 years b2k)
• Corg (%)

Code for missing values: NA

Comments

The core was collected from 79.91° N, 143.23° E in 1120 m water depth. The age model is on the GICC05 timescale (Rasmussen et al. 2006. A new Greenland ice core chronology for the last glacial termination. J. Geophys. Res., 111, D06102). Note that credibility intervals do not include maximum counting uncertainty associated with the ice-core chronology, but only consider the uncertainty associated with the alignment between the 31-PC porosity data and GISP2 δ¹⁸O data.

[javascript protected email address] is affiliated with the Department of Geography, University of Cambridge, Cambridge CB2 3EN, UK.