Organic geochemistry of sediment core PG2208 ...

• Main Authors: Biskaborn, Boris K, Nazarova, Larisa B, Kröger, Tim, Pestryakova, Luidmila A, Syrykh, Luidmila S, Pfalz, Gregor, Herzschuh, Ulrike, Diekmann, Bernhard
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: diatoms; Lake sediment core; lake sediment proxies; Siberia; Siberian Arctic; DEPTH, sediment/rock; Nitrogen, total; Carbon, total; Carbon, organic, total; δ13C, organic carbon; Water content, sediment; Composite Core; Carbon and nitrogen and sulfur CNS isotope element analyzer, Elementar, Vario EL III; Carbon and nitrogen and sulfur CNS isotope element analyzer, Elementar, Elementar Vario MAX Cube; Mass spectrometer Finnigan Delta-S; RU-Land_2013_Yakutia; AWI Arctic Land Expedition; Paleo Modelling PalMod; Polar Terrestrial Environmental Systems @ AWI AWI_Envi; Arctic; Freed
• Online Access: https://dx.doi.org/10.1594/pangaea.942070; https://doi.pangaea.de/10.1594/PANGAEA.942070

To gain information on organic matter variability we analyzed 204 samples for total carbon (TC) and nitrogen (N), 190 samples for total organic carbon (TOC), 45 samples for stable carbon isotopes (δ13C), and determined the water content in 417 samples. We used an Elementar Vario EL III to estimate TC and N from two repeated measurements of each freeze-dried and milled sample. The measurement accuracy is 0.05% for TC and 0.1% for TN. We used a Vario MAX C analyser to determine TOC. Measurement accuracy was 0.1%. We analyzed δ13C from carbonate-freed samples using a Finnigan Delta-S mass spectrometer. Results are presented as δ13C values relative to the PDB reference standard (‰) with an error of ±0.15%. ...