You, Defang; Stein, Ruediger; Lohmann, Gerrit; Masoum, Ahmadreza; Fahl, Kirsten; Wu, Junjie; Jackson, Rebecca (2025): The highly branched isoprenoid and the open-water phytoplankton biomarker analysis of sediment core SL170 from Baffin Bay [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.982609
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Published: 2025-11-13 • DOI registered: 2025-11-13
Abstract:
This dataset presents biomarker records from sediment core SL170 (MSM09/02-0455/13; 68°58.15′ N, 59°23.58′ W; 1078 m water depth), recovered from eastern Baffin Bay during the MSM09/02 expedition of R/V Maria S. Merian. The highly branched isoprenoid (IP25) and the open-water phytoplankton biomarker (dinosterol) were analysed to reconstruct past sea ice algal productivity and primary production, respectively, covering the period from ~17,000 to 10,000 years BP. The PDIP25 index was further calculated to provide semi-quantitative estimates of past sea ice cover. Biomarker analyses were carried out at the Alfred Wegener Institute, Bremerhaven.
Supplement to:
You, Defang; Stein, Ruediger; Lohmann, Gerrit; Masoum, Ahmadreza; Fahl, Kirsten; Wu, Junjie; Jackson, Rebecca (2026): Surface freshening in the subpolar North Atlantic sustaining the weakened AMOC during the late Younger Dryas. Science Advances, 12(1), eadv6220, https://doi.org/10.1126/sciadv.adv6220
Funding:
German Research Foundation (DFG), grant/award no. 221211316: GRK/IRTG 1904: ArcTrain - Processes and impacts of climate change in the North Atlantic Ocean and the Canadian Arctic
Coverage:
Latitude: 68.969200 * Longitude: -59.393000
Date/Time Start: 2008-09-05T10:13:00 * Date/Time End: 2008-09-05T10:13:00
Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 6.765 m
Event(s):
MSM09/2_455-13 (GeoTü SL 170) * Latitude: 68.969200 * Longitude: -59.393000 * Date/Time: 2008-09-05T10:13:00 * Elevation: -1091.0 m * Location: Davis Strait * Campaign: MSM09/2 * Basis: Maria S. Merian * Method/Device: Gravity corer (GC) * Comment: rope length max. 1114m
Comment:
This dataset includes concentrations of IP25 and dinosterol from sediment core SL170 (Baffin Bay), covering the period from 17,000 to 10,000 years BP. IP25 concentrations reflect sea ice algal productivity, while dinosterol serves as an indicator of open-water phytoplankton productivity. Based on these biomarker concentrations, the PDIP25 index was calculated to provide semi-quantitative estimates of past sea ice cover. For intervals in which either the IP25 or the dinosterol levels are zero or very low, the PDIP25 values are indeterminable and are not displayed in the data set.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | You, Defang | Geocode | |
| 2 | AGE | Age | ka BP | You, Defang | Geocode | |
| 3 | 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, per unit mass total organic carbon | IP25/TOC | µg/g | You, Defang | Gas chromatography - Mass spectrometry (GC-MS) | |
| 4 | 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon | Dinosterol/TOC | µg/g | You, Defang | Gas chromatography - Mass spectrometry (GC-MS) | |
| 5 | Phytoplankton biomarker Dinosterol IP25 index | PDIP25 | You, Defang | Calculated |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
269 data points