Seemann, Fabian; Frauhammer, Carolin; Ebel, Lars; Lindemann, Justin; Weiner, Mikaela; Wolter, Juliane; Strauss, Jens (2025): Sedimentary n‑alkane biomarkers with carbon, nitrogen and δ¹³C profiling from the Baldwin Peninsula (Arctic Alaska) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.984991
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Published: 2025-09-16 • DOI registered: 2025-10-15
Abstract:
In March 2024, sediment cores were collected along two land–ocean transects on the Baldwin Peninsula, Alaska, encompassing permafrost uplands, thermokarst lakes, drained lake basins, and nearshore marine sites. Transect 0 (T0) includes a recently drained lake basin (drainage in 2022), whereas Transect 1 (T1) represents a semi-drained lake basin. These transects capture characteristic landscape dynamics of the region and their implications for organic matter transformation, with both transects hosting taliks. To assess organic carbon properties, n-alkane biomarkers were analyzed. Raw chromatographic data were processed with XCalibur (Thermo Fisher), and derived proxies were subsequently calculated.
Related to:
Seemann, Fabian; Frauhammer, Carolin; Ebel, Lars; Lindemann, Justin; Mollenhauer, Gesine; Eulenburg, Antje; Weiner, Mikaela; Meyer, Hanno; Strauss, Jens (2025): Biogeochemical and hydrochemical investigations on sediment cores from thermokarst terrain on the Baldwin Peninsula, northwestern Alaska [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.984854
Additional metadata:
SENSOR: Metadata for mass spectrometer ThermoFisher Scientific Delta-V-Advantage at current Version. Alfred Wegener Institut Helmholtz Centre for Polar and Marine Research, hdl:10013/sensor.1df540c8-1409-43bf-a237-9af0cd871fca
Project(s):
Permafrost Research (AWI_Perma)
Coverage:
Median Latitude: 66.831269 * Median Longitude: -162.515133 * South-bound Latitude: 66.785585 * West-bound Longitude: -162.527225 * North-bound Latitude: 66.907028 * East-bound Longitude: -162.490954
Date/Time Start: 2024-03-12T00:00:00 * Date/Time End: 2024-03-21T00:00:00
Minimum DEPTH, sediment/rock: 2.5 m * Maximum DEPTH, sediment/rock: 302.0 m
Event(s):
AK-Land_2024_NWAlaska_spring_BAL24_T0_DLB_001 * Latitude: 66.905016 * Longitude: -162.511771 * Date/Time: 2024-03-12T00:00:00 * Recovery: 2.14 m * Campaign: AK-Land_2024_NWAlaska_spring * Basis: AWI Arctic Land Expedition * Method/Device: SIPRE corer (SIPREC) * Comment: SIPRE corer (7.5 cm diameter)
AK-Land_2024_NWAlaska_spring_BAL24_T0_L_002 * Latitude: 66.903148 * Longitude: -162.506359 * Date/Time: 2024-03-13T00:00:00 * Recovery: 3.11 m * Campaign: AK-Land_2024_NWAlaska_spring * Basis: AWI Arctic Land Expedition * Method/Device: Vibra-corer * Comment: Vibra corer (7.5 cm diameter; 1.44 m compressed)
AK-Land_2024_NWAlaska_spring_BAL24_T0_M_001 * Latitude: 66.907028 * Longitude: -162.513997 * Date/Time: 2024-03-14T00:00:00 * Recovery: 0.55 m * Campaign: AK-Land_2024_NWAlaska_spring * Basis: AWI Arctic Land Expedition * Method/Device: Push corer (PUC) * Comment: Push corer (7 cm diameter)
Comment:
F.S. received funding from the German Federal Environmental Foundation (Deutsche Bundesstiftung Umwelt).
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Seemann, Fabian | |||
| 2 | Core | Core | Seemann, Fabian | |||
| 3 | Transect | Transect | Seemann, Fabian | |||
| 4 | Sample position | Samp pos | Seemann, Fabian | |||
| 5 | DEPTH, sediment/rock | Depth sed | m | Seemann, Fabian | Geocode – mean sample depth | |
| 6 | Depth, sediment/rock, top/minimum | Depth sed top | m | Seemann, Fabian | layer top | |
| 7 | Depth, sediment/rock, bottom/maximum | Depth sed bot | m | Seemann, Fabian | layer bottom | |
| 8 | Carbon, total | TC | % | Seemann, Fabian | Carbon Analyzer, Elementar, soli TOC cube | |
| 9 | Carbon, organic, total | TOC | % | Seemann, Fabian | Carbon Analyzer, Elementar, soli TOC cube | |
| 10 | Nitrogen, total | TN | % | Seemann, Fabian | Nitrogen Analyzer, Elementar, rapid MAX N exceed | |
| 11 | Carbon/Nitrogen ratio | C/N | Seemann, Fabian | |||
| 12 | δ13C, organic carbon | δ13C Corg | ‰ PDB | Seemann, Fabian | Mass spectrometer, ThermoFischer, Delta-V | ISOLAB Potsdam (Sensor (2022)) |
| 13 | 5alpha-androstane, per unit sediment mass | 5a-Androstane/sed | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 14 | 5alpha-androstane, per unit mass total organic carbon | 5a-Androstane/TOC | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 15 | n-Heneicosane, per unit sediment mass | C21/sed | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 16 | n-Heneicosane, per unit mass total organic carbon | C21/TOC | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 17 | n-Docosane, per unit sediment mass | C22/sed | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 18 | n-Docosane, per unit mass total organic carbon | C22/TOC | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 19 | n-Tricosane, per unit sediment mass | C23/sed | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 20 | n-Tricosane, per unit mass total organic carbon | C23/TOC | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 21 | n-Tetracosane, per unit sediment mass | C24/sed | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 22 | n-Tetracosane, per unit mass total organic carbon | C24/TOC | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 23 | n-Pentacosane, per unit sediment mass | C25/sed | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 24 | n-Pentacosane, per unit mass total organic carbon | C25/TOC | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 25 | n-Hexacosane, per unit sediment mass | C26/sed | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 26 | n-Hexacosane, per unit mass total organic carbon | C26/TOC | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 27 | n-Heptacosane, per unit sediment mass | C27/sed | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 28 | n-Heptacosane, per unit mass total organic carbon | C27/TOC | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 29 | n-Octacosane, per unit sediment mass | C28/sed | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 30 | n-Octacosane, per unit mass total organic carbon | C28/TOC | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 31 | n-Nonacosane, per unit sediment mass | C29/sed | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 32 | n-Nonacosane, per unit mass total organic carbon | C29/TOC | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 33 | n-Triacontane, per unit sediment mass | C30/sed | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 34 | n-Triacontane, per unit mass total organic carbon | C30/TOC | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 35 | n-Hentriacontane, per unit sediment mass | C31/sed | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 36 | n-Hentriacontane, per unit mass total organic carbon | C31/TOC | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 37 | n-Dotriacontane, per unit sediment mass | C32/sed | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 38 | n-Dotriacontane, per unit mass total organic carbon | C32/TOC | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 39 | n-Tritriacontane, per unit sediment mass | C33/sed | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 40 | n-Tricontane, per unit mass total organic carbon | C33/TOC | µg/g | Seemann, Fabian | Gas chromatography mass spectrometry (GC-MS), Thermo Fisher Scientific, Gas Chromatograph, TRACE 1310; coupled with Single Quadrupole Mass Spectrometer, ISQ 7000 | |
| 41 | Average chain length, n-Alkanes, C23-C33 | ACL 23-33 | Seemann, Fabian | (δi23-33*Ci23-33)/δCi23-33) | ||
| 42 | Carbon Preference Index, n-Alkanes (C23-C33) | CPI 23-33 | Seemann, Fabian | ((δodd nC23-nC31)+(δodd nC25-nC33))/(2*(δeven nC24-32)) | ||
| 43 | Odd-over-even predominance, sum odd numbered/sum even numbered n-alkanes ratio | OEP n-alk | Seemann, Fabian | (nC27+nC29+nC31+nC33)/(nC26+nC28+nC30+nC32) | ||
| 44 | Aquatic n-alkane proxy (C23+C33)/(C23+C25+C29+C31) | Paq | Seemann, Fabian | |||
| 45 | Index of waxy n-alkanes to total hydrocarbons (C27+C29+C31)/(C23+C25+C29+C31) | Pwax | Seemann, Fabian | |||
| 46 | n-Alkanes, (C31+C33)/(C27+C31+C33) ratio | (C31+C33)/(C27+C31+C33) | Seemann, Fabian | |||
| 47 | Comment | Comment | Seemann, Fabian |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1365 data points