Description: This dataset comprises raw downcore plant wax data (compound-specific concentration, δ2H, and δ13C of n-alkanes and fatty acids) from the Rotsee sediment core ROT21. A lake located in Central Switzerland, 47°04′10″N, 8°18′48″E, 419 m a.s.l.), spanning the Late Glacial to Holocene (~12.9–0 ka cal BP). It supports hydroclimate and vegetation reconstructions in Santos et al. (2025, Geophysical Research Letters, in submission), focusing on δ²H values and relative abundances of n-alkanes to derive precipitation δ²Hprc after vegetation corrections.
Global identifier:
Doi(
"10.1594/PANGAEA.987812",
)
DataMeasurements(
DataMeasurements {
domain: Unspecified,
station: None,
measured_variables: [
"AGE",
"C14:0-fatty acid methyl esters",
"C15:0-fatty acid methyl esters",
"C16:0-fatty acid methyl esters",
"C16:0-fatty acid methyl esters, δ13C",
"C16:0-fatty acid methyl esters, δ13C, standard deviation",
"C16:0-fatty acid methyl esters, δD",
"C16:0-fatty acid methyl esters, δD, standard deviation",
"C17:0-fatty acid methyl esters",
"C18:0-fatty acid methyl esters",
"C18:0-fatty acid methyl esters, δ13C",
"C18:0-fatty acid methyl esters, δ13C, standard deviation",
"C18:0-fatty acid methyl esters, δD",
"C18:0-fatty acid methyl esters, δD, standard deviation",
"C20:0-fatty acid methyl esters",
"C20:0-fatty acid methyl esters, δ13C",
"C20:0-fatty acid methyl esters, δ13C, standard deviation",
"C20:0-fatty acid methyl esters, δD",
"C20:0-fatty acid methyl esters, δD, standard deviation",
"C21:0-fatty acid methyl esters",
"C22:0-fatty acid methyl esters",
"C22:0-fatty acid methyl esters, δ13C",
"C22:0-fatty acid methyl esters, δ13C, standard deviation",
"C22:0-fatty acid methyl esters, δD",
"C22:0-fatty acid methyl esters, δD, standard deviation",
"C23:0-fatty acid methyl esters",
"C24:0-fatty acid methyl esters",
"C24:0-fatty acid methyl esters, δ13C",
"C24:0-fatty acid methyl esters, δ13C, standard deviation",
"C24:0-fatty acid methyl esters, δD",
"C24:0-fatty acid methyl esters, δD, standard deviation",
"C25:0-fatty acid methyl esters",
"C26:0-fatty acid methyl esters",
"C26:0-fatty acid methyl esters, δ13C",
"C26:0-fatty acid methyl esters, δ13C, standard deviation",
"C26:0-fatty acid methyl esters, δD",
"C26:0-fatty acid methyl esters, δD, standard deviation",
"C27:0-fatty acid methyl esters",
"C28:0-fatty acid methyl esters",
"C28:0-fatty acid methyl esters, δ13C",
"C28:0-fatty acid methyl esters, δ13C, standard deviation",
"C28:0-fatty acid methyl esters, δD",
"C28:0-fatty acid methyl esters, δD, standard deviation",
"C29:0-fatty acid methyl esters",
"C30:0-fatty acid methyl esters",
"C30:0-fatty acid methyl esters, δ13C",
"C30:0-fatty acid methyl esters, δ13C, standard deviation",
"C30:0-fatty acid methyl esters, δD",
"C30:0-fatty acid methyl esters, δD, standard deviation",
"C31:0-fatty acid methyl esters",
"C32:0-fatty acid methyl esters",
"C32:0-fatty acid methyl esters, δ13C",
"C32:0-fatty acid methyl esters, δ13C, standard deviation",
"Counts",
"DEPTH, sediment/rock",
"Sample code/label",
"n-Alkane C17",
"n-Alkane C20",
"n-Alkane C21",
"n-Alkane C21, δ13C",
"n-Alkane C21, δ13C, standard deviation",
"n-Alkane C22",
"n-Alkane C23",
"n-Alkane C23, δ13C",
"n-Alkane C23, δ13C, standard deviation",
"n-Alkane C23, δD",
"n-Alkane C24",
"n-Alkane C25",
"n-Alkane C25, δ13C",
"n-Alkane C25, δ13C, standard deviation",
"n-Alkane C25, δD",
"n-Alkane C25, δD, standard deviation",
"n-Alkane C26",
"n-Alkane C27",
"n-Alkane C27, δ13C",
"n-Alkane C27, δ13C, standard deviation",
"n-Alkane C27, δD",
"n-Alkane C27, δD, standard deviation",
"n-Alkane C28",
"n-Alkane C29",
"n-Alkane C29, δ13C",
"n-Alkane C29, δ13C, standard deviation",
"n-Alkane C29, δD",
"n-Alkane C29, δD, standard deviation",
"n-Alkane C30",
"n-Alkane C31",
"n-Alkane C31, δ13C",
"n-Alkane C31, δ13C, standard deviation",
"n-Alkane C31, δD",
"n-Alkane C31, δD, standard deviation",
"n-Alkane C32",
"n-Alkane C33",
"n-Alkane C34",
],
methods: [
"Gas chromatography - Isotope ratio mass spectrometer (GC-IRMS)",
],
},
)
Comment: This dataset contains compound-specific hydrogen (δ2H) and carbon (δ13C) isotope compositions and concentrations of long-chain n-alkanes and fatty acids (n-alkanoic acids) from the ROT21 sediment record of Rotsee, Central Switzerland (47°04′10″N, 8°18′48″E, 419 m a.s.l.). Sediment cores were retrieved in October 2021 using a UWITEC gravity corer, and the dataset spans the past ~13,000 years based on 19 radiocarbon dates (terrestrial and aquatic macrofossils) integrated with 210Pb and 137Cs profiles (see De Jonge et al., 2025). Laboratory analyses were conducted between February 2023 and November 2024 at the University of Basel. Sediment samples (~2–5 g) were sub-sampled, freeze-dried, spiked with internal standards (n-C19-alkanoic acid, n-C36-alkane, 2-octadecanone, and n-C21-alkanol), and extracted with dichloromethane/methanol (9:1, v/v) using an Accelerated Solvent Extractor (Dionex ASE 350, Thermo Fisher Scientific). Following saponification, neutral fractions were separated via silica gel chromatography, and fatty acids were converted to fatty acid methyl esters (FAMEs). Both n-alkanes and FAMEs were further purified to isolate saturated compounds using AgNO3-impregnated silica gel columns, then analyzed and quantified by gas chromatography with flame ionization detection (GC-FID). Peak areas were normalized to recovery standards to account for potential losses during sample handling, and compounds were identified by comparison with external standards. Compound-specific δ2H and δ13C values were determined by gas chromatography-isotope ratio mass spectrometry (GC-IRMS) and normalized to the VSMOW-SLAP (δ2H) and VPDB (δ13C) scales. Analytical precision was ±3-5 ‰ for δ2H and ±0.2–0.3 ‰ for δ13C. The dataset was generated to reconstruct Holocene hydroclimate and vegetation dynamics in Central Europe using plant wax δ2H records. Full methodological details are provided in the associated manuscript (Santos et al., in submission).
Origins: /Wissenschaft/PANGAEA
Tags: Vegetation ? Seen ? Biomarker ? Methylester ? Schweiz ? Mitteleuropa ? Daten ? Niederschlag ? CSIA ? Holocene ? Lake sediment core ? Rotsee ? Younger Dryas ? d13C ? d2H ? fatty acids ? leaf waxes ? n-alkanes ? plant waxes ?
Region: Rotsee, Switzerland
Bounding boxes: 9.3133333° .. 9.3133333° x 48.0694444° .. 48.0694444°
License: cc-by/4.0
Data access requires registration: click here for further informationLanguage: Englisch/English
Modified: 2025-12-01
Time ranges: 2021-10-03 - 2021-10-05
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