Henrieka Detlef, Matt O'Regan, Christian Stranne, Mads Mørk Jensen, Marianne Glasius, Thomas M. Cronin, Martin Jakobsson, Christof Pearce
This dataset includes sea-ice related biomarkers and the amount of total organic carbon from 15 surface sediment samples and two gravity cores collected during the Ryder 2019 Expedition with Swedish icebreaker Oden. The data were collected to reconstruct the Holocene variability in the southern Lincoln Sea sea-ice conditions.
The sea-ice related biomarkers include IP25 (short for Ice proxy with 25 carbon atoms) and brassicasterol. IP25 is produced by certain haptophyte algae living in brine channels at the bottom of seasonal sea-ice, while brassicasterol is a biomarker characteristic of marine phytoplankton productivity.
From the IP25 and brassicasterol data the PBIP25 index has been calculated, which is a semi-quantitative measure of past sea ice conditions. The surface samples cover the northern end of Nares Strait, Petermann Fjord, the southern Lincoln Sea, and Sherard Osborn Fjord. The two gravity cores (Ryder19-12-GC1, Ryder19-14-GC1) are from the southern Lincoln Sea and cover the Holocene period.
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Citation
Henrieka Detlef, Matt O'Regan, Christian Stranne, Mads Mørk Jensen, Marianne Glasius, Thomas M. Cronin, Martin Jakobsson, Christof Pearce (2023) Sea-ice biomarkers and total organic carbon from sediment of Holocene age collected in the southern Lincoln Sea in 2019. Dataset version 1. Bolin Centre Database. https://doi.org/10.17043/oden-ryder-2019-sediment-detlef-lincoln-sea-1
References
Detlef H, O'Regan M, Stranne C, Mørk Jensen M, Glasius M, Cronin TM, Jakobsson M, Pearce C (2023) Seasonal sea-ice in the Arctic’s last ice area during the Early Holocene. Commun Earth Environ 4:86. https://doi.org/10.1038/s43247-023-00720-w
Data description
The data are provided as three semicolon-separated values (.csv) files. Each gravity core (Ryder19-12-GC1, Ryder19-14-GC1) and the surface sample dataset has its own .csv file. Character set: Western Europe (ISO-8859-15/EURO). File content:
Surface samples (biomarker-surface-samples.csv)
The surface samples dataset is made up of 16 columns and 16 rows (including titles).
The metadata for each datapoint (first 8 columns) include the cruise name, the site number, the core name (MC = multi core), the core section (in case of MC’s section refers to the respective MC-tube), the top and bottom depth of the sample in centimeters, the mid-depth of the sample in centimeters, and the respective sample ID. The next two columns are the latitude and longitude of the respective core from which the samples was taken.
The remaining six columns contain the data, including the amount of total organic carbon (TOC) in weight % (wt.%), IP25 in nanograms per gram sediment (ng/g sed) and micrograms per gram TOC (µg/g TOC), brassicasterol in micrograms per gram sediment (µg/g sed) and micrograms per gram TOC (µg/g TOC), and PBIP25. PBIP25 has been calculated as described in the associated publication.
Core Ryder19-12-GC1 (biomarker-ryder19-12-GC1.csv)
The dataset for Ryder19-12-GC1 is made up of 17 columns and 49 rows (including titles).
The metadata for each datapoint (first 8 columns) include the cruise name, the site number, the core name (MC = multi core), the core section (in case of MC’s section refers to the respective MC-tube), the top and bottom depth of the sample in centimeters, the mid-depth of the sample in centimeters, and the respective sample ID.
The next three columns contain the age of each sample, including a mid- lower and upper age, given in calibrated years before present (cal yrs BP). For more information on the construction of the age model, please refer to the associated publication.
The remaining six columns contain the data, including the amount of total organic carbon (TOC) in weight % (wt.%), IP25 in nanograms per gram sediment (ng/g sed) and micrograms per gram TOC (µg/g TOC), brassicasterol in micrograms per gram sediment (µg/g sed) and micrograms per gram TOC (µg/g TOC), and PBIP25. PBIP25 has been calculated as described in the associated publication.
Core Ryder19-14-GC1 (biomarker-ryder19-14-GC1.csv)
The dataset for Ryder19-14-GC1 is made up of 17 columns and 32 rows (including titles).
The metadata for each datapoint (first 8 columns) include the cruise name, the site number, the core name (MC = multi core), the core section (in case of MC’s section refers to the respective MC-tube), the top and bottom depth of the sample in centimeters, the mid-depth of the sample in centimeters, and the respective sample ID.
The next three columns contain the age of each sample, including a mid- lower and upper age, given in calibrated years before present (cal yrs BP). For more information on the construction of the age model, please refer to the associated publication.
The remaining six columns contain the data, including the amount of total organic carbon (TOC) in weight % (wt.%), IP25 in nanograms per gram sediment (ng/g sed) and micrograms per gram TOC (µg/g TOC), brassicasterol in micrograms per gram sediment (µg/g sed) and micrograms per gram TOC (µg/g TOC), and PBIP25. PBIP25 has been calculated as described in the associated publication.
Comments
This dataset is related to the following datasets:
The bulk density and XRF Ca/Ti ratios from Ryder19-12-GC1 and Ryder19-14-GC1 were used for lithological correlation and age modelling of the two cores. Please see the associated publication for details. Coordinates for the gravity core sites can also be found in the two related datasets.
Data were collected during the Ryder 2019 expedition on board the Swedish icebreaker (I/B) Oden, which was organized by the Swedish Polar Research Secretariat.