Berg, Sonja; Kusch, Stephanie; Jivcov, Sandra (2024): Compound-specific 14C isotope composition in marine and terrestrial sedimentary archives from sub-Antarctic South Georgia [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.967398 (DOI registration in progress), In: Berg, S et al. (2024): Alkyl lipid distribution, elemental composition and compound-specific 14C isotope composition in marine and terrestrial sedimentary archives from sub-Antarctic South Georgia [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.967394
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
The dataset comprises radiocarbon (14C) data that was obtained on sediment samples from sub-Antarctic South Georgia. The sediments were collected from a range of different sites, including lakes, peat deposits, a marine inlet and a fjord during RV Polarstern expedition PS81 in 2013. Prior to the geochemical analyses reported here, the sediments were freeze-dried and ground. More details on the study sites, sampling and data evaluation can be found in Berg et al. (submitted manuscript).
Sediment and plant samples for Radiocarbon (14C) analysis were pre-treated and analyzed as described by Rethemeyer et al. (2019). For the analysis of 14C in bulk organic carbon (bulk OC) and plant fossils were washed with 1% HCl (1 hr, 60°C followed by ca. 10 hr at room temperature) to remove carbonates. The acid insoluble fraction was then graphitized and analyzed for 14C at the CologneAMS facility (Cologne, Germany).
For compound-specific 14C analysis individual alkanoic acids, alkanes and alkanols were isolated by preparative capillary GC using a gas chromatograph (7680 Agilent Technologies, USA) equipped with a CIS 4 injection system (Gerstel, Germany), coupled with a preparative fraction collector (PFC; Gerstel, Germany). The purity and quantity of individual compounds was monitored by GC-FID (Agilent 7890B equipped with an on-column injector, Agilent Technologies, USA). Samples with a purity of >98% were processed further. For samples from core Co1305 compound-specific 14C analysis was performed on a MICADAS AMS system equipped with a gas ionization source (ETH Zurich, Switzerland, Wacker et al., 2010) on purified CO2 produced by combustion in vacuum-sealed quartz tubes. Compound ages were corrected for processing blanks and carbon added during derivatization using mass balance (Berg et al., 2020). For core Co1308 compound-specific 14C analysis was conducted on the original isolated compounds with a High Voltage 6 MV Tandetron coupled to an EA-GIS periphery at the CologneAMS facility (Stolz et al., 2019).
Compound-specific F14C values were corrected for processing blanks and the addition of one carbon atom during derivatization using mass balance (Berg et al. 2020 and Scheidt et al., 2021). AMS results are reported as fraction modern (F14C) and conventional radiocarbon ages (yrs BP) as outlined in Stuiver & Polach (1977)
Related to:
Berg, Sonja; et al. (accepted): Alkyl lipid distributions and compound-specific 14C isotope compositions in diverse sedimentary archives in sub-Antarctic South Georgia: Deconvolving (past and present) marine and terrestrial sources and revealing localized export dynamics in response to environmental change.
Source:
Berg, Sonja; Jivcov, Sandra; Kusch, Stephanie; Kuhn, Gerhard; Wacker, Lukas; Rethemeyer, Janet (2020): Compound‐specific radiocarbon analysis of (Sub‐)Antarctic coastal marine sediments ‐ potential and challenges for chronologies. Paleoceanography and Paleoclimatology, accepted, https://doi.org/10.1029/2020PA003890
Berg, Sonja; Kuhn, Gerhard; Rethemeyer, Janet (2020): Radiocarbon data determined on sediments from coastal marine inlets and fjords in South Georgia and Rauer Group, East Antarctica. PANGAEA, https://doi.org/10.1594/PANGAEA.920081
Berg, Sonja; White, Duanne A; Jivcov, Sandra; Melles, Martin; Leng, Melanie J; Rethemeyer, Janet; Allen, Claire Susannah; Perren, Bianca; Bennike, Ole; Viehberg, Finn Andreas (2019): Holocene glacier fluctuations and environmental changes in subantarctic South Georgia inferred from a sediment record from a coastal inlet. Quaternary Research, 91(1), 132-148, https://doi.org/10.1017/qua.2018.85
References:
Rethemeyer, Janet; Gierga, M; Heinze, S; Stolz, Alexander; Wotte, A; Wischhöfer, P; Berg, Sonja; Melchert, J O; Dewald, A (2019): Current Sample Preparation and Analytical Capabilities of the Radiocarbon Laboratory at CologneAMS. Radiocarbon, 61(5), 1449-1460, https://doi.org/10.1017/RDC.2019.16
Scheidt, Stephanie; Berg, Sonja; Hambach, Ulrich; Klasen, Nicole; Pötter, Stephan; Stolz, Alexander; Veres, Daniel; Zeeden, Christian; Brill, Dominik; Brückner, Helmut; Kusch, Stephanie; Laag, Christian; Lehmkuhl, Frank; Melles, Martin; Monnens, Florian; Oppermann, Lukas; Rethemeyer, Janet; Nett, Janina J (2021): Chronological Assessment of the Balta Alba Kurgan Loess-Paleosol Section (Romania) – A Comparative Study on Different Dating Methods for a Robust and Precise Age Model. Frontiers in Earth Science, 8, 598448, https://doi.org/10.3389/feart.2020.598448
Stolz, Alexander; Dewald, A; Heinze, S; Altenkirch, R; Hackenberg, G; Herb, S; Müller-Gatermann, C; Schiffer, M; Zitzer, G; Wotte, A; Rethemeyer, Janet; Dunai, Tibor J (2019): Improvements in the measurement of small 14CO2 samples at CologneAMS. Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms, 439, 70-75, https://doi.org/10.1016/j.nimb.2018.12.008
Stuiver, Minze; Polach, Henry A (1977): Discussion: Reporting of 14C Data. Radiocarbon, 19(3), 355-363, https://doi.org/10.1017/S0033822200003672
Project(s):
Funding:
German Research Foundation (DFG), grant/award no. 463250038: Integrating terrestrial and marine sediment records from East Antarctica to explore late Pleistocene and Holocene ice sheet instability
German Research Foundation (DFG), grant/award no. 5472008: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
Coverage:
Median Latitude: -54.194378 * Median Longitude: -36.570182 * South-bound Latitude: -54.215333 * West-bound Longitude: -36.591150 * North-bound Latitude: -54.188500 * East-bound Longitude: -36.538000
Date/Time Start: 2013-04-01T00:00:00 * Date/Time End: 2013-04-11T00:00:00
Minimum Elevation: -198.1 m * Maximum Elevation: 24.0 m
Event(s):
Co1305 * Latitude: -54.192900 * Longitude: -36.591100 * Date/Time: 2013-04-01T00:00:00 * Elevation: -19.6 m * Recovery: 11.04 m * Campaign: ANT-XXIX/4 (PS81) * Basis: Polarstern * Method/Device: Piston corer, UWITEC (PCUWI)
Co1306 * Latitude: -54.188500 * Longitude: -36.578610 * Elevation: 2.0 m * Campaign: ANT-XXIX/4 (PS81) * Basis: Polarstern * Method/Device: Russian peat corer and gravity corer
Co1308 * Latitude: -54.192000 * Longitude: -36.544750 * Elevation: 24.0 m * Campaign: ANT-XXIX/4 (PS81) * Basis: Polarstern * Method/Device: Russian peat corer and gravity corer
Comment:
Dated material:
bulk organic carbon (bulk OC): acid insoluble fraction of organic carbon (AIO)
plant makrofossil (plant): acid insoluble fraction of organic carbon (AIO)
alkanol with x carbon atoms (Cx:0 alkanol): Compound-specific 14C age of alkanol with x carbon atoms
alkanoic acid with x carbon atoms (Cx:0 alkanoic acid): Compound-specific 14C age of alkanoic acid with x carbon atoms
alkane with x carbon atoms (Cx:0 alkane): Compound-specific 14C age of alkane with x carbon atoms
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Berg, Sonja | |||
| 2 | Cruise/expedition | Expedition | Berg, Sonja | Campaign | ||
| 3 | Area/locality | Area | Berg, Sonja | Region | ||
| 4 | Site | Site | Berg, Sonja | |||
| 5 | LATITUDE | Latitude | Berg, Sonja | Geocode | ||
| 6 | LONGITUDE | Longitude | Berg, Sonja | Geocode | ||
| 7 | ELEVATION | Elevation | m a.s.l. | Berg, Sonja | Geocode | |
| 8 | Depth, bathymetric | Bathy depth | m | Berg, Sonja | ||
| 9 | DATE/TIME | Date/Time | Berg, Sonja | Geocode | ||
| 10 | Core | Core | Berg, Sonja | |||
| 11 | DEPTH, sediment/rock | Depth sed | m | Berg, Sonja | Geocode | |
| 12 | Depth, top/min | Depth top | m | Berg, Sonja | ||
| 13 | Depth, bottom/max | Depth bot | m | Berg, Sonja | ||
| 14 | Depth, top/min | Depth top | m | Berg, Sonja | correlated depth | |
| 15 | Depth, bottom/max | Depth bot | m | Berg, Sonja | correlated depth | |
| 16 | Sample ID | Sample ID | Berg, Sonja | |||
| 17 | Age, dated material | Dated material | Berg, Sonja | see comment | ||
| 18 | Fraction modern carbon | F14C | Berg, Sonja | MICADAS Accelerator Mass Spectrometer | ||
| 19 | Fraction modern carbon, error | F14C e | ± | Berg, Sonja | MICADAS Accelerator Mass Spectrometer | 1σ |
| 20 | Age, dated | Age dated | ka BP | Berg, Sonja | Age, 14C AMS | |
| 21 | Age, dated standard deviation | Age dated std dev | ± | Berg, Sonja | Age, 14C AMS | 1σ |
| 22 | Age, comment | Comm | Berg, Sonja | |||
| 23 | Sample mass | Samp m | µg | Berg, Sonja | µg C for compound-specific 14C analysis | |
| 24 | Reference/source | Reference | Berg, Sonja | |||
| 25 | Uniform resource locator/link to reference | URL ref | Berg, Sonja | |||
| 26 | Reference of data | Ref data | Berg, Sonja |
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:
1368 data points