GDGTs in sediment core Haem13 from lake Hämelsee


This dataset provides glycerol dialkyl glycerol tetraethers (GDGTs) concentrations for the Lateglacial sediment sequence retrieved from Lake Hämelsee (Germany) in 2013. GDGTs concentrations (ng/g) are presented against both depth (m) and age (cal yr. BP). The GDGTs dataset was used to calculate the GDGT-0/crenarchaeol ratio, which was interpreted to represent lake water oxygenation, which, given the local settings, was likely driven by changes in windiness. Additionally, the GDGT dataset was used to calculate the degree of methylation of 5-methyl brGDGTs (MBT'5me), which can be used to reconstruct past temperature change through translation MBT'5me into mean temperature of the months above freezing. As such, the GDGT data provides information on LGIT climate dynamics at lake Hämelsee. Of the 167 samples used for lipid extraction (see, the alcohol/fatty acid fraction of 94 samples was further processed to analyse glycerol dialkyl glycerol tetraethers (GDGTs), which are membrane lipids of certain archaea and bacteria (Schouten et al., 2013). In short, a known amount of internal standard was added to each fraction, which was then redissolved in hexane:isopropanol 99:1 and passed over a 0.45 µm PTFE filter prior to injection on a Agilent 1260 Infinity ultra-high performance liquid chromatograph coupled to an Agilent 6130 single quadrupole mass spectrometer following the settings and elution protocol of Hopmans et al. (2016). A minimum peak area of 3000 and a signal-to-noise ratio of >3 was maintained as detection limit. Quantification of the GDGTs is based on the assumption that the mass spectrometer equally responds to the GDGTs and the internal standard. All analyses were performed in the laboratories of Utrecht University, the Netherlands.

0 = below detection limit

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Creator Engels, Stefan ORCID logo; Lane, Christine S ORCID logo; Hoek, Wim Z (ORCID: 0000-0001-7313-100X); Baneschi, Ilaria; Bouwman, Annerieke; Brogan, Eilis; Ramsey, Christopher Bronk ORCID logo; Collins, James A; de Bruijn, Renee; Haliuc, Aritina ORCID logo; Heiri, Oliver ORCID logo; Hubay, Katalin; Jones, Gwydion; Jones, Vivienne; Laug, Andreas ORCID logo; Merkt, Josef; Muschitiello, Francesco; Müller, Meike; Peters, Tom; Peterse, Francien ORCID logo; Pueschel, Ashley; Staff, Richard A (ORCID: 0000-0002-8634-014X); ter Schure, Anneke; van den Bos, Valerie; Wagner-Cremer, Frederike
Publisher PANGAEA
Publication Year 2024
Funding Reference European Cooperation in Science and Technology Crossref Funder ID COST action ES0907 ES0907 - INTegrating Ice core, MArine and TErrestrial records - 60,000 to 8000 years ago (INTIMATE)
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 1973 data points
Discipline Earth System Research
Spatial Coverage (9.317 LON, 52.767 LAT); Lake Haemelsee, Germany
Temporal Coverage Begin 2013-07-08T09:00:00Z
Temporal Coverage End 2013-07-12T17:00:00Z