/* DATA DESCRIPTION:
Citation:	Lin, Tsai-Wen; Grotheer, Hendrik; Hefter, Jens; Mollenhauer, Gesine (2026): Compound specific radiocarbon data from sediment core PS51/159-10, western Laptev Sea, Arctic Ocean [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.996477
Abstract:	Subsample 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.
Keyword(s):	Arctic Ocean; Biomarker; Compound-specific radiocarbon analysis; CSRA; fatty acids; Laptev Sea; Last deglaciation; Marine Sediment Core; n-alkane; n-alkanoic acids; Radiocarbon dating; terrestrial biomarkers
Supplement to:	Lin, Tsai-Wen; Adolphi, Florian; Grotheer, Hendrik; Hefter, Jens; Tesi, Tommaso; Lachner, Johannes; Winkler, Stella; Wu, Junjie; Queiroz Alves, Eduardo; Mollenhauer, Gesine (preprint): Precisely dated records of pre-aged terrestrial organic matter release to the western Laptev Sea during the last deglaciation. Climate of the Past, https://doi.org/10.5194/egusphere-2026-4726
References:	Douglas, Peter M J; Pagani, Mark; Eglinton, Timothy Ian; Brenner, Mark; Hodell, David A; Curtis, Jason H; Ma, Keith F; Breckenridge, Andy (2014): Pre-aged plant waxes in tropical lake sediments and their influence on the chronology of molecular paleoclimate proxy records. Geochimica et Cosmochimica Acta, 141, 346-364, https://doi.org/10.1016/j.gca.2014.06.030
	Lin, Tsai-Wen; Tesi, Tommaso; Hefter, Jens; Grotheer, Hendrik; Wollenburg, Jutta Erika; Adolphi, Florian; Bauch, Henning A; Nogarotto, Alessio; Müller, Juliane; Mollenhauer, Gesine (2025): Environmental controls of rapid terrestrial organic matter mobilization to the western Laptev Sea since the Last Deglaciation. Climate of the Past, 21(4), 753-772, https://doi.org/10.5194/cp-21-753-2025
	Mollenhauer, Gesine; Grotheer, Hendrik; Gentz, Torben; Bonk, Elizabeth; Hefter, Jens (2021): Standard operation procedures and performance of the MICADAS radiocarbon laboratory at Alfred Wegener Institute (AWI), Germany. Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms, 496, 45-51, https://doi.org/10.1016/j.nimb.2021.03.016
	Sun, Shuwen; Meyer, Vera D; Dolman, Andrew M; Winterfeld, Maria; Hefter, Jens; Dummann, Wolf; McIntyre, Cameron; Montluçon, Daniel; Haghipour, Negar; Wacker, Lukas; Gentz, Torben; van der Voort, Tessa Sophia; Eglinton, Timothy Ian; Mollenhauer, Gesine (2020): 14C Blank Assessment in Small-Scale Compound-Specific Radiocarbon Analysis of Lipid Biomarkers and Lignin Phenols. Radiocarbon, 62(1), 207-218, https://doi.org/10.1017/RDC.2019.108
	Wacker, Lukas; Christl, Marcus (2011): Data reduction for small radiocarbon samples–error propagation using the model of constant contamination. In: Ion Beam Physics, ETH Zurich, Annual Report 2011, Laboratory of Ion Beam Physics, ETH Zurich, Zurich, 36-37
	Winterfeld, Maria; Mollenhauer, Gesine; Dummann, Wolf; Köhler, Peter; Lembke-Jene, Lester; Meyer, Vera D; Hefter, Jens; McIntyre, Cameron; Wacker, Lukas; Kokfelt, Ulla; Tiedemann, Ralf (2018): Deglacial mobilization of pre-aged terrestrial carbon from degrading permafrost. Nature Communications, 9(1), https://doi.org/10.1038/s41467-018-06080-w
Funding:	Helmholtz Association of German Research Centres (HGF) (URI: https://www.helmholtz.de), grant/award no. PIE-0018: German-Italian partnership project between AWI and CNR-ISP on Chronologies for Polar Paleoclimate Archives (PAIGE)
	Helmholtz Association of German Research Centres (HGF) (URI: https://www.helmholtz.de), grant/award no. VH-NG 1501
Coverage:	LATITUDE: 76.766667 * LONGITUDE: 116.031667
	DATE/TIME START: 1998-08-18T01:41:00 * DATE/TIME END: 1998-08-18T01:52:00
	MINIMUM DEPTH, sediment/rock: 0.125 m * MAXIMUM DEPTH, sediment/rock: 4.015 m
Event(s):	PS51/159-10 (URI: https://store.pangaea.de/Images/Cores/PS-stationcard/PS51_159-stationcard.pdf) * LATITUDE: 76.766667 * LONGITUDE: 116.031667 * DATE/TIME START: 1998-08-18T01:41:00 * DATE/TIME END: 1998-08-18T01:52:00 * ELEVATION: -60.0 m * PENETRATION: 5.1 m * RECOVERY: 4.02 m * LOCATION: Laptev Sea * CAMPAIGN: ARK-XIV/1b (PS51 Transdrift-V) * BASIS: Polarstern (URI: https://doi.org/10.17815/jlsrf-3-163) * METHOD/DEVICE: Kasten corer (KAL) * COMMENT: 5 core sections: 0.04-1.03, 1.04-2.03, 2.04-3.02, 3.03-4.02, 4.03-4.2 m
Parameter(s):	DEPTH, sediment/rock [m] (Depth sed) * GEOCODE * PI: Lin, Tsai-Wen (https://orcid.org/0000-0002-2244-3705, tsai-wen.lin@awi.de)
	Depth, sediment/rock, top/minimum [m] (Depth sed top) * PI: Lin, Tsai-Wen (https://orcid.org/0000-0002-2244-3705, tsai-wen.lin@awi.de)
	Depth, sediment/rock, bottom/maximum [m] (Depth sed bot) * PI: Lin, Tsai-Wen (https://orcid.org/0000-0002-2244-3705, tsai-wen.lin@awi.de)
	Compounds (Comp) * PI: Lin, Tsai-Wen (https://orcid.org/0000-0002-2244-3705, tsai-wen.lin@awi.de)
	Carbon [µg] (C) * PI: Lin, Tsai-Wen (https://orcid.org/0000-0002-2244-3705, tsai-wen.lin@awi.de) * COMMENT: sample size
	Fraction modern carbon, compound specific (F14C compound) * PI: Lin, Tsai-Wen (https://orcid.org/0000-0002-2244-3705, tsai-wen.lin@awi.de) * METHOD/DEVICE: Mini Carbon Dating System (MICADAS)
	Fraction modern carbon, compound specific, standard deviation [±] (F14C compound std dev) * PI: Lin, Tsai-Wen (https://orcid.org/0000-0002-2244-3705, tsai-wen.lin@awi.de)
	Sample code/label (Sample label) * PI: Lin, Tsai-Wen (https://orcid.org/0000-0002-2244-3705, tsai-wen.lin@awi.de)
License:	Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/)
Status:	Curation Level: Enhanced curation (URI: https://wiki.pangaea.de/wiki/Curation_levels)
Size:	70 data points
*/
Depth sed [m]	Depth sed top [m]	Depth sed bot [m]	Comp	C [µg]	F14C compound	F14C compound std dev [±]	Sample label
0.125	0.120	0.130	n-C28:0	40	0.2213	0.0126	12980.2.1
0.825	0.820	0.830	n-C28:0	78	0.0575	0.0072	12981.2.1
1.400	1.395	1.405	n-C28:0	119	0.0303	0.0048	12982.2.1
1.900	1.895	1.905	n-C28:0	59	0.0310	0.0097	12983.2.1
2.800	2.795	2.805	n-C28:0	50	0.0011	0.0120	12984.2.1
4.015	4.010	4.020	n-C28:0	100	0.0730	0.0059	12985.2.1
1.400	1.395	1.405	n-C23	54	0.0103	0.0023	12982.4.1
1.400	1.395	1.405	n-C25	69	0.0212	0.0020	12982.5.1
1.400	1.395	1.405	n-C29	96	0.0247	0.0017	12982.6.1
1.400	1.395	1.405	n-C31	50	0.0135	0.0025	12982.7.1