10.1594/PANGAEA.996477Lin, Tsai-WenTsai-WenLin0000-0002-2244-3705Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenUniversity of BremenGrotheer, HendrikHendrikGrotheer0000-0003-0207-3767Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenMARUM - Center for Marine Environmental Sciences, University BremenHefter, JensJensHefter0000-0002-5823-1966Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenMollenhauer, GesineGesineMollenhauer0000-0001-5138-564XAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenMARUM - Center for Marine Environmental Sciences, University BremenPANGAEA2026Arctic OceanBiomarkerCompound-specific radiocarbon analysisCSRAfatty acidsLaptev SeaLast deglaciationMarine Sediment Coren-alkanen-alkanoic acidsRadiocarbon datingterrestrial biomarkersDEPTH, sediment/rockDepth, sediment/rock, top/minimumDepth, sediment/rock, bottom/maximumCompoundsCarbonFraction modern carbon, compound specificFraction modern carbon, compound specific, standard deviationSample code/labelKasten corerMini Carbon Dating System (MICADAS)ARK-XIV/1bPolarstern1998-08-18T01:41:00/1998-08-18T01:52:00Dataset10.5194/egusphere-2026-472610.1016/j.gca.2014.06.03010.5194/cp-21-753-202510.1016/j.nimb.2021.03.01610.1017/RDC.2019.10810.1038/s41467-018-06080-w70 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalSubsample slices thick between 1 and 4 cm were taken from sediment core PS51/159-10 for compound-specific radiocarbon analysis (CSRA) for terrestrial biomarkers. The subsample intervals were selected based on downcore variations in biomarker contents (Lin et al., 2025), to correspond to periods of rapid and little terrestrial organic matter mobilizations during the early last deglaciation and the Holocene. Target compounds include mid-chain (n-C23, n-C25) n-alkanes, high molecular weight (HMW, or long-chain) (n-C29, n-C31) n-alkanes, and HMW (n-C28:0) fatty acid. Lipid extractions and purifications for CSRA followed the procedure described in Winterfeld et al. (2018). Radiocarbon measurements on isolated compounds were conducted on samples containing a minimum of 40 µg C using a Mini Carbon Dating System (MICADAS), following the method described in Mollenhauer et al. (2021). CSRA values were reported as F14C, which were corrected for carbon introduced during methylation (Douglas et al., 2014) and processing blanks (Wacker and Christl, 2011). Processing blanks were assessed by analyzing modern and fossil laboratory standards processed alongside the samples, following Sun et al. (2020). The estimated background introduced during processing contained 5.5 ± 0.5 μg C with F14C = 0.7632 ± 0.0394 for n-C28:0 fatty acid measurements, and 2.4 ± 0.2 μg C with F14C = 0.3671 ± 0.0296 for n-alkane measurements.116.0316666666776.766666666667Laptev SeaHelmholtz Association of German Research Centreshttps://doi.org/10.13039/501100001656PIE-0018German-Italian partnership project between AWI and CNR-ISP on Chronologies for Polar Paleoclimate Archives (PAIGE)Helmholtz Association of German Research Centreshttps://doi.org/10.13039/501100001656VH-NG 1501