Biogeochemical parameters of thawed sediments underneath a Yedoma and Alas thermokarst lake in Eastern Siberia, version 2 ...

• Main Authors: Jongejans, Loeka Laura, Liebner, Susanne, Knoblauch, Christian, Mangelsdorf, Kai, Strauss, Jens
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Arctic; Biomarkers; Central Yakutia; greenhouse gas production; talik; thawed permafrost; thermokarst lake; Yedoma deposits; Event label; Core; Sample ID; Depth, top/min; Depth, bottom/max; DEPTH, sediment/rock; Carbon, total; Carbon, organic, total; Nitrogen, total; n-Alkane, total per unit sediment mass; n-Alkane, average chain length; Carbon Preference Index, n-Alkanes; Sum branched glycerol dialkyl glycerol tetraether, per unit sediment mass; Archaeol per unit sediment mass; Isoprenoid acyclic glycerol dialkyl glycerol tetraether per unit sediment mass; pH, soil; pH, porewater; Truck mounted rotary drill; Carbon and nitrogen and sulfur CNS element analyzer, Elementar, Vario MAX; Element analyser calculated by TC-TIC; Gas chromatograph-mass spectrometer; Calculated; Liquid chromatography-mass spectrometry LC-MS; WTW MultiLab 540; RU-Land_2015_CentralYakutia_Yuke; AWI Arctic Land Expedition; Carbon in Permafrost / Kohlenstoff im Permafrost KoPF; Cluster of Excellence Climate, Climatic Change, and Society CLICCS; Rapid Permafrost Thaw in a Warming Arctic and Impacts on the Soil Organic Carbon Pool PETA-CARB; Peta; Talik; permafrost; Thermokarst; Yakutia; Siberia
• Online Access: https://dx.doi.org/10.1594/pangaea.941155; https://doi.pangaea.de/10.1594/PANGAEA.941155

This dataset describes two 17 m long sediment cores taken from beneath two thermokarst lakes in the Yukechi Alas, Central Yakutia, Russia. The first core was taken from below an Alas thermokarst lake (YU-L7; 61.76397°N, 130.46442°E) and the second core below and Yedoma lake (YU-L15; 61.76086°N, 130.47466°E).The dataset presents biogeochemical and biomarker parameters of sediment cores YU-L7 and YU-L15. Biogeochemical analyses include total carbon (TC) content, total organic carbon (TOC) content, total nitrogen (TN) content. Biomarker parameters include the n-alkane concentration, average chain length (ACL), carbon preference index (CPI), brGDGT concentration, archaeol concentration and the isoGDGT-0 concentration.The n-alkanes were measured in the aliphatic fraction by gas chromatography-mass spectromety using a Trace GC Ultra coupled to a DSQ MS.The branched and isoprenoid glycerol dialkyl glycerol tetraethers, as well as the dialkyl glycerol diether lipid (archaeol) were measured in the NSO fraction using ...