n-Fatty acid composition per total organic carbon in a rapidly eroding permafrost cliff ...

• Main Authors: Haugk, Charlotte, Jongejans, Loeka Laura, Mangelsdorf, Kai, Fuchs, Matthias, Ogneva, Olga, Palmtag, Juri, Mollenhauer, Gesine, Mann, Paul James, Overduin, Pier Paul, Grosse, Guido, Sanders, Tina, Tuerena, Robyn E, Schirrmeister, Lutz, Wetterich, Sebastian, Kizyakov, Alexander, Strauss, Jens
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Biomarker; Carbon; erosion; n-alkane; n-fatty acids; Siberia; Yedoma; Event label; Sample ID; Height above river level; 3-hydroxyl-fatty acid C60, per unit mass total organic carbon; n-fatty acid C80, per unit mass total organic carbon; 3-hydroxyl-fatty acid C70, per unit mass total organic carbon; n-fatty acid C90, per unit mass total organic carbon; 3-hydroxyl-fatty acid C80, per unit mass total organic carbon; iso-fatty acid C100, per unit mass total organic carbon; n-fatty acid C100, per unit mass total organic carbon; iso-fatty acid C110, per unit mass total organic carbon; anteiso-fatty acid C110, per unit mass total organic carbon; n-fatty acid C110, per unit mass total organic carbon; anteiso-fatty acid C120, per unit mass total organic carbon; n-fatty acid C120, per unit mass total organic carbon; iso-fatty acid C130, per unit mass total organic carbon; anteiso-fatty acid C130, per unit mass total organic carbon; n-fatty acid C130, per unit mass total organic carbon; iso-fatty acid C140, per unit mass total organic carbon; n-fatty acid C140, per unit mass total organic carbon; 10-methyl-fatty acid C140, per unit mass total organic carbon; iso-fatty acid C150, per unit mass total organic carbon; anteiso-fatty acid C150, per unit mass total organic carbon; n-fatty acid C150, per unit mass total organic carbon; iso-fatty acid C160, per unit mass total organic carbon; fatty acid C161w7cis, per unit mass total organic carbon; fatty acid C161w7trans, per unit mass total organic carbon; fatty acid C161w5, per unit mass total organic carbon; n-fatty acid C160, per unit mass total organic carbon; iso-fatty acid C171, per unit mass total organic carbon; 10-methyl-fatty acid C160, per unit mass total organic carbon; 12-methyl-fatty acid C160, per unit mass total organic carbon; anteiso-fatty acid C171, per unit mass total organic carbon; methyl-fatty acid C160, per unit mass total organic carbon; iso-fatty acid C170, per unit mass total organic carbon; anteiso-fatty acid C170, per unit mass total organic carbon; n-fatty acid C171, per unit mass total organic carbon; cyclo-fatty acid C17, per unit mass total organic carbon; n-fatty acid C170, per unit mass total organic carbon; 10-methyl-fatty acid C170, per unit mass total organic carbon; methyl-fatty acid C170, per unit mass total organic carbon; Phytanoic acid, per unit mass total organic carbon; iso-fatty acid C180, per unit mass total organic carbon; Arctic; lena river; permafrost
• Online Access: https://dx.doi.org/10.1594/pangaea.940136; https://doi.pangaea.de/10.1594/PANGAEA.940136

Organic carbon (OC) stored in Arctic permafrost represents one of Earth’s largest and most vulnerable terrestrial carbon pools. Amplified climate warming across the Arctic results in widespread permafrost thaw. Permafrost deposits exposed at river cliffs and coasts are particularly susceptible to thawing processes. Accelerating erosion of terrestrial permafrost along shorelines leads to increased transfer of organic matter (OM) to nearshore waters. However, the amount of terrestrial permafrost carbon and nitrogen as well as the OM quality in these deposits are still poorly quantified. Here, we characterise the sources and the quality of OM supplied to the Lena River at a rapidly eroding permafrost river shoreline cliff in the eastern part of the delta (Sobo-Sise Island). Our multi-proxy approach captures bulk elemental, molecular geochemical and carbon isotopic analyses of late Pleistocene Yedoma permafrost and Holocene cover deposits, discontinuously spanning the last ~52 ka. We show that the ancient ...