You Defang defang.you@geow.uni-heidelberg.de 0000-0001-8835-3254 University of Heidelberg Stein Ruediger ru_st@uni-bremen.de https://www.awi.de/en/about-us/organisation/staff/single-view/ruediger-stein.html 0000-0002-4453-9564 University of Bremen Uni Bremen http://www.uni-bremen.de/en.html https://ror.org/04ers2y35 Lohmann Gerrit gerrit.lohmann@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/gerrit-lohmann.html 0000-0003-2089-733X Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven AWI https://www.awi.de/ https://ror.org/032e6b942 Masoum Ahmadreza ahmadreza.masoum@awi.de Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven AWI https://www.awi.de/ https://ror.org/032e6b942 Fahl Kirsten kirsten.fahl@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/kirsten-fahl.html 0000-0001-9317-4656 Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven AWI https://www.awi.de/ https://ror.org/032e6b942 Wu Junjie junjie.wu@awi.de 0000-0001-7618-6989 Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven AWI https://www.awi.de/ https://ror.org/032e6b942 Jackson Rebecca rjackson@marum.de 0000-0002-0861-3173 MARUM - Center for Marine Environmental Sciences, University Bremen MARUM http://www.marum.de/ https://ror.org/04ers2y35 2025 The highly branched isoprenoid and the open-water phytoplankton biomarker analysis of sediment core SL170 from Baffin Bay dataset https://doi.org/10.1594/PANGAEA.982609 2025-11-13T09:30:44 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. You Defang defang.you@geow.uni-heidelberg.de 0000-0001-8835-3254 Stein Ruediger ru_st@uni-bremen.de https://www.awi.de/en/about-us/organisation/staff/single-view/ruediger-stein.html 0000-0002-4453-9564 Lohmann Gerrit gerrit.lohmann@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/gerrit-lohmann.html 0000-0003-2089-733X Masoum Ahmadreza ahmadreza.masoum@awi.de Fahl Kirsten kirsten.fahl@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/kirsten-fahl.html 0000-0001-9317-4656 Wu Junjie junjie.wu@awi.de 0000-0001-7618-6989 Jackson Rebecca rjackson@marum.de 0000-0002-0861-3173 2026 Surface freshening in the subpolar North Atlantic sustaining the weakened AMOC during the late Younger Dryas journal article Science Advances 12(1) https://doi.org/10.1126/sciadv.adv6220 eadv6220 -59.393 -59.393 68.9692 68.9692 -59.393 68.9692 2008-09-05T10:13:00 2008-09-05T10:13:00 0.005 6.765 German Research Foundation DFG http://www.dfg.de/en/ https://doi.org/10.13039/501100001659 221211316 GRK/IRTG 1904: ArcTrain - Processes and impacts of climate change in the North Atlantic Ocean and the Canadian Arctic https://gepris.dfg.de/gepris/projekt/221211316 MSM09/2_455-13 GeoTü SL 170 68.9692 -59.393 Davis Strait -1091.0 2008-09-05T10:13:00 MSM09/2 MSM09/2 St. John's, Canada 2008-08-21T00:00:00 2008-08-21 St. John's, Canada 2008-09-15T00:00:00 2008-09-15 Maria S. Merian https://en.wikipedia.org/wiki/RV_Maria_S._Merian DBBT 9274197 Kucera, Michal Kucera, Michal doi:10.2312/cr_msm09 20080167 hdl:10013/epic.44783.d008 hdl:10013/epic.44804.d027 Maria S. Merian https://en.wikipedia.org/wiki/RV_Maria_S._Merian DBBT 9274197 Gravity corer GC rope length max. 1114m 269 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ 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. DEPTH, sediment/rock Depth sed m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock Length L http://dbpedia.org/resource/Length You Defang defang.you@geow.uni-heidelberg.de 0000-0001-8835-3254 Depth sed [m] AGE Age ka BP http://en.wikipedia.org/wiki/Kyr age http://purl.obolibrary.org/obo/PATO_0000011 Time T http://dbpedia.org/resource/Time You Defang defang.you@geow.uni-heidelberg.de 0000-0001-8835-3254 Age [ka BP] 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, per unit mass total organic carbon IP25/TOC µg/g 2,6,10,14-tetramethyl-7-(3-methylpent-4-enyl)pentadecane total organic carbon TOC Gas chromatography - Mass spectrometry (GC-MS) Chromatographs & spectrometers gas chromatographs http://vocab.nerc.ac.uk/collection/L05/current/LAB02/ You Defang defang.you@geow.uni-heidelberg.de 0000-0001-8835-3254 IP25/TOC [µg/g] 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon Dinosterol/TOC µg/g total organic carbon TOC Gas chromatography - Mass spectrometry (GC-MS) Chromatographs & spectrometers gas chromatographs http://vocab.nerc.ac.uk/collection/L05/current/LAB02/ You Defang defang.you@geow.uni-heidelberg.de 0000-0001-8835-3254 Dinosterol/TOC [µg/g] Phytoplankton biomarker Dinosterol IP25 index PDIP25 Calculated You Defang defang.you@geow.uni-heidelberg.de 0000-0001-8835-3254 PDIP25 CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels citable Baffin Bay Biomarkers Primary production Sea ice author110994 author118 author20401 author517 author59364 author75121 author94694 award441 basis650 campaign3391514 campaign33925 curlevel30 event2697785 funder20472 geocode1 geocode1599 geocode1600 geocode1601 geocode2205 geocode8128 inst20712 inst21283 inst277 inst32 journal16776 license21 method11107 method279 method50 param9193 param99630 param99635 pi94694 ref133441 term1073131 term1073135 term2299481 term23768 term38263 term38303 term39143 term41056 term43863 term43975 term47389 term47694 term48797 term49267 term68027 term77756