Sea ice, phytoplankton and terrestrial biomarker fluxes/concentrations in sediment core 31-PC

Albin Eriksson, Junjie Wu, Matt O´Regan, Örjan Gustafsson

This dataset contains fluxes and concentrations of biomarkers related to sea ice (IP25), phytoplankton (dinosterol and brassicasterol) and terrestrial input (campesterol and B-sitosterol) from sediment core 31-PC and 31-MUC, sampled during SWERUS-2014-Leg 2 on the Southern Lomonosov Ridge.

The dataset has been used to further understand the Arctic sea ice distribution during periods of abrupt climate change and how that affects carbon mobilization processes. The data was generated through lipid extractions on subsamples from an 8 m long sediment core, spanning the past 27 kyrs.

MarineSediment coresSea iceBiomarkersCarbonArctic

Name

Version

Citation

Data description

The dataset consists of four csv files.

Quality-control-parameters.csv

Limit of detection and relative standard deviation of all the biomarkers during analysis with gas-chromatography mass-spectrometry.

• Biomarker
• Limit of detection (µg/µl)
• Relative standard deviation

Blank-concentrations.csv

Concentrations of the investigated biomarkers in the laboratory blank in µg/µl. If the sample is labelled "n.d" then the compound was not detected in the blank.

• Sample ID
• IP25 (µg/µl)
• Brassicasterol (µg/µl)
• Campesterol (µg/µl)
• B-Sitosterol (µg/µl)
• Dinosterol (µg/µl)

Biomarker-data.csv

Concentrations, accumulation rates, and indices of lipid biomarkers measured in the sediment core.

• Sample ID Unique identifier for each sediment sample
• Sample weight (g) Amount of dry sediment used for lipid extraction
• ka BP Calibrated thousand years before present for each sample
• IP25 (µg/µl) Concentration of IP25 in the extract, expressed as micrograms per microliter.
• IP25 (µg/gSediment) Concentration of IP25 normalized to sediment dry weight, expressed as micrograms per gram of sediment.
• IP25 (µg/gOC) Concentration of IP25 normalized to organic carbon content, expressed as micrograms per gram of organic carbon.
• IP25 (g/m2/year) Flux or accumulation rate of IP25, expressed as grams per square meter per year.
• Brassicasterol (µg/µl) Concentration of brassicasterol in the extract, expressed as micrograms per microliter.
• Brassicasterol (µg/gSediment) Concentration of brassicasterol normalized to sediment dry weight.
• Brassicasterol (µg/gOC) Concentration of brassicasterol normalized to organic carbon.
• Brassicasterol (g/m2/year) Flux or accumulation rate of brassicasterol.
• Dinosterol (µg/µl) Concentration of dinosterol in the extract, expressed as micrograms per microliter.
• Dinosterol (µg/gSediment) Concentration of dinosterol normalized to sediment dry weight.
• Dinosterol (µg/gOC) Concentration of dinosterol normalized to organic carbon.
• Dinosterol (g/m2/year) Flux or accumulation rate of dinosterol.
• Campesterol (µg/µl) Concentration of campesterol in the extract.
• Campesterol (µg/gSediment) Concentration of campesterol normalized to sediment dry weight.
• Campesterol (µg/gOC) Concentration of campesterol normalized to organic carbon.
• Campesterol (g/m2/year) Flux or accumulation rate of campesterol.
• B-sitosterol (µg/µl) Concentration of β-sitosterol in the extract.
• B-sitosterol (µg/gSediment) Concentration of β-sitosterol normalized to sediment dry weight.
• B-sitosterol (µg/gOC) Concentration of β-sitosterol normalized to organic carbon.
• B-sitosterol (g/m2/year) Flux or accumulation rate of β-sitosterol.
• C(brassicasterol) Concentration balance factor for dinosterol
• C(Dinosterol) Balance factor used in the calculation of the dinosterol-based PDIP25 index.
• PBIP25 Phytoplankton(brassicasterol)-IP25 index
• PDIP25 Phytoplankton(dinosterol)-IP25 index

Carbon-characteristics.csv

• Sample ID Unique identifier for each sediment sample
• OC (%) Total Organic Carbon in % (OC (%) from 31-MUC
• δ13C (‰) The stable carbon isotope composition of the bulk organic carbon (per mille) from 31-MUC
• Predepositional age (years) Pre-depositional ages of the organic carbon in the sediment core in years -Predepositional age (stdev) of the organic carbon in years.

Publisher

Bolin Centre Database

License

Open Data Commons Attribution License (ODC-By) v1.0

First name

Albin

Last name or organisation

Eriksson

Email address

albin.eriksson@aces.su.se

Address

Department of Environmental Science; Stockholm University

Postal code

SE-106 91

City

Stockholm

Country

Sweden

GCMD science keyword

Earth science > Oceans > Ocean chemistry > Biogeochemical cycles

GCMD location

Ocean > Arctic Ocean

Dataset language

English

Begin date

2026-04-24

DOI

Time